ZyXEL Communications ES-1552 manual

www .zyxel.com ES-1552 52-port W eb-managed Ethernet Switch User ’ s Guide V ersion 1.12 5/2007 Edition 2[...]

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About This User's Guide ES-1552 User’s Guide 3 About This User's Guide Intended Audience This manual is intended for people who want to configure the switch using the web configurator . Y ou should have at leas t a basic knowledge of TCP/IP networking concepts and topology . Related Document ation • Quick Start Guide The Quick S tart [...]

Document Conventions ES-1552 User’s Guide 4 Document Conventions W arnings and Notes These are how warnings and notes are shown in this User ’ s Guide. 1 W arnings tell you about things that could harm you or your device. " Notes tell you other important informati on (for example, other things you may need to configure or helpful tip s) or[...]

Document Conventions ES-1552 User’s Guide 5 Icons Used in Figures Figures in this User ’ s Guide may use the followi ng generic icons. The switch icon is not an exact representation of your device. switch Computer Notebook computer Server DSLAM Firewall T ele phone Switch Router[...]

Safety Warnings ES-1552 User’s Guide 6 Safety Warnings 1 For your safety , be sure to read and follow all warni ng notices and instructions. • Do NOT use this product near water , for example, in a wet basement or near a swimming pool. • Do NOT expose your device to dampness, dust or corrosive liquids. • Do NOT store thin gs on the device. [...]

Safety Warnings ES-1552 User’s Guide 7[...]

Safety Warnings ES-1552 User’s Guide 8[...]

Contents Overview ES-1552 User’s Guide 9 Contents Overview Introduction and Hardware Overview ..................................................... ............................. 25 Getting to Know Y our Switch .............. ............. ................ ............. ................ ............. ............. . .. 27 Hardware Installation and[...]

Contents Overview ES-1552 User’s Guide 10[...]

Table of Contents ES-1552 User’s Guide 11 Table of Contents About This User's Guide ..................................................................................... ..................... 3 Document Conventions.................................................................. ......................................... .4 Safety Warnings .[...]

Table of Contents ES-1552 User’s Guide 12 3.3.1 Power Connector ......... ................ ............. ................. ............ ............. ................ ....... 38 3.4 LEDs .................. ............. ............. ............. ................ ............. ............. ............. .. .............. 38 Part II: Basic &[...]

Table of Contents ES-1552 User’s Guide 13 Chapter 8 VLAN ........................................................................... ................................................ ............. 63 8.1 Introduction to IEEE 802.1Q T agged VLANs ........... ................................ ............. .......... 63 8.1.1 Forwarding T agged and U[...]

Table of Contents ES-1552 User’s Guide 14 13.1 Configuring L2 Management .......... .... ......... ............. ................ ............. ............. .......... 83 13.1.1 Add a S tatic MAC Address Entry .... ... ................ ............. ............. ............. ............. 84 13.2 Viewing the L2 Address T able .. ...... .... ..[...]

Table of Contents ES-1552 User’s Guide 15 18.3 SNMP User ............ ............. ............. ................ ............. ............. ................ ............. .. .......1 10 18.3.1 SNMP User: Create .. .................... ............. ............. ............ ................. ............ ......1 10 18.3.2 SNMP User: Modify ..[...]

Table of Contents ES-1552 User’s Guide 16 Part IV : Appendices and Inde x ........................................................... 147 Appendix A Product S pecifications ................................................. ...................................... 149 Appendix B IP Addresses and Subnetting ...........................................[...]

List of Figures ES-1552 User’s Guide 17 List of Figures Figure 1 Backbone Application ....... ............. ................ ................ ............. ................ ............... ....... ....... 27 Figure 2 Bridging Application ..... ............. ............. ............. ................ ............. ............. ......... .......[...]

List of Figure s ES-1552 User’s Guide 18 Figure 39 DSCP Based QoS ... ............. ................ ............. ................ ............. ................ ........... ............ 76 Figure 40 T oS Based QoS .... ...... ............. ............. ............. ............. ................ ............. ........... ............ ... 77 F[...]

List of Figures ES-1552 User’s Guide 19 Figure 82 RMON Event Log: Overview . ............. ................ ................ ............. ................ ............. .... .... 132 Figure 83 RMON Event Log: Event . ............. ................ ............. ................ ............. ................ ....... ...... . 132 Figure 84 Dynami[...]

List of Figure s ES-1552 User’s Guide 20[...]

List of Tables ES-1552 User’s Guide 21 List of Tables T able 1 Panel Connect ions ......... ............. ................ ............. ................. ............ ................. ... ................ 35 T able 2 LEDs ........... ................ ............. ............. ................ ............. ............. ................ .. ..[...]

List of Tables ES-1552 User’s Guide 22 T able 39 SNMP Trap s ........... ................ ............. ............. ................ ............. ................ ........ ............... . 106 T able 40 SNMP EngineID ........ ................ ............. ............. ................ ............. ................ ........ ........ ..... 1[...]

List of Tables ES-1552 User’s Guide 23 T able 82 Subnet 4 .............. ............. ................ ............. ................ ............. ............. .......... ............... ..... 158 T able 83 Eight Subnets ......... ................ ............. ................ ............. ................ ............. ....... .............[...]

List of Tables ES-1552 User’s Guide 24[...]

25 P ART I Introduction and Hardware Overview Getting to Know Y our Switch (27) Hardware Installation and Connectio n (31) Hardware Overview (35)[...]

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ES-1552 User’s Guide 27 C HAPTER 1 Getting to Know Your Switch This chapter introduces the main feat ures and applications of the switch. 1.1 Introduction The ES-1552 is an Et hernet switch with 48 10/100Mbps port s , two RJ-45 Gigabit ports for stacking and two mini-GBIC slots for fiber connections. W ith its built-in web configurator , managing[...]

Chapter 1 Getting to Know Your Switch ES-1552 User’s Guide 28 1.1.2 Bridging Example In this example application the switch connects dif ferent company departments ( RD and Sales ) to the corpora te backbone. It can al levi ate bandwidth contention and eliminate server and network bottlenecks. All users that need high bandwidth can connect to hi [...]

Chapter 1 Getting to Kn ow Your Switch ES-1552 User’s Guide 29 Figure 3 High Performance Switched Workgroup Ap plication 1.1.4 IEEE 802.1Q VLAN Application Examples A VLAN (V irtual Local Area Network) allows a physical network to be partitioned into multiple logical networks. Stations on a logical network belong to on e group. A station can belo[...]

Chapter 1 Getting to Know Your Switch ES-1552 User’s Guide 30[...]

ES-1552 User’s Guide 31 C HAPTER 2 Hardware Installation and Connection This chapter shows you how to in stall and connect the switch. 2.1 Freest anding Inst allation 1 Make sure the switch is clean and dry . 2 Set the switch on a smooth, level surface st rong enough to support the weight of the switch and the connected cables. Make sure there is[...]

Chapter 2 Hardware Installation and Connection ES-1552 User’s Guide 32 " Do NOT block the ventilation holes. Leave space between devices when stacking. For proper ventilation, allow at least 4 inches (10 cm) of clearan ce at the front and 3.4 inches (8 cm) at the b ack of t he switch. This is especially important for enclosed rack installati[...]

Chapter 2 Hard ware Installation and Connection ES-1552 User’s Guide 33 Figure 6 Attaching the Mounting Brackets 2 Using a #2 Philips screwdriver , install the M3 flat head screws through the mounting bracket holes into the switch. 3 Repeat steps 1 and 2 to install the second mounting br acket on the other side of the switch. 4 Y ou may now mount[...]

Chapter 2 Hardware Installation and Connection ES-1552 User’s Guide 34[...]

ES-1552 User’s Guide 35 C HAPTER 3 Hardware Overview This chapter describes the front panel a nd rear pa nel of the switch and shows you how to make the hardware conn ections. 3.1 Panel Connections and the RESET Button The figure below shows the fro nt panel of the switch. Figure 8 Front Panel The following table describes the ports on the panels[...]

Chapter 3 Hard ware Overvie w ES-1552 User’s Guide 36 There are two Gigabit Ethernet ports. The speed of the Gigabit Ethernet ports can be 10 M bps, 100Mbps or 1000Mbps an d the duplex mode can be half duplex (at 100 Mbps) or full duplex . An auto-negoti ating port can detect and adjust to the optimum Ethernet speed (100/ 1000Mpbs) and duplex mod[...]

Chapter 3 Hardware Overview ES-1552 User’s Guide 37 3 The switch automatically detects the installed transceiver . Check the LEDs to verify that it is functioning properly . Figure 10 Installed T ransc eiver 3.1.2.2 T ransceiver Removal Use the following steps to remove a mini GBIC transceiver (SFP module). 1 Open the transceiver ’ s latch (lat[...]

Chapter 3 Hard ware Overvie w ES-1552 User’s Guide 38 " When you use the RESET button all of your configuration settings will be lost. Use the default IP address (192.168.1.1) and user name (admin) and password (1234) to log back into the switch. It may t ake up to 2 minutes for the switch to restart when you rel oad the default configuratio[...]

Chapter 3 Hardware Overview ES-1552 User’s Guide 39 100/1000 Green On The link to a 1000 Mbps Ethernet network is up. Amber On The link to a 100 Mbps Ethernet n etwork is up. Off The link to a 10 Mbps Ethernet network is up. Or the link to an Ethernet network is down. ACT Green On The link to an Ethernet network i s up. Blinking The Ethernet port[...]

Chapter 3 Hard ware Overvie w ES-1552 User’s Guide 40[...]

41 P ART II Basic & Advanced Settings The W eb Configurator (43) System (49) Port Settings (55) (59) VLAN (63) T runking (67) Mirroring (69) QoS (71) Port Rate Limit and S torm Control (79) Layer 2 (L2) Management (83) Cable Diagnostics (87) Auto Denial of Service (DoS) (89) Auto V oIP (93)[...]

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ES-1552 User’s Guide 43 C HAPTER 4 The Web Configurator This section introduces the con figuration and functions of the web config urator . 4.1 Introduction The web configu rator is an HTML-based ma nage ment interface that allows easy switch setup and management via Interne t browser . Use In ternet Explorer 6.0 and later or Netscape Navigator 7[...]

Chapter 4 The Web Configurator ES-1552 User’s Guide 44 Figure 14 Web Configura t or: Login 4 Click OK to view the first w eb configurator screen. 4.3 The St atus Screen The System screen is the first screen that displa ys when you access the web configurator . The following figure shows the navigating compon ents of the web configurator screen. F[...]

Chapter 4 The Web Configurator ES-1552 User’s Guide 45 4.3.1 The LED Panel Use the LED panel to view the status of the individual ports. The LED pa nel in the web configurator upda tes automa tically every 5 seconds. Figure 16 LED Panel The following table describes the labels in this screen. 4.3.2 The Navigation Panel Navigate to individual feat[...]

Chapter 4 The Web Configurator ES-1552 User’s Guide 46 4.3.3 Change Y our Password After you log in for the first time, it is reco mmended y ou change the default administrator password. Click System , Password to display the next screen. QoS Use these screens to configure queuing with associa ted queue weights for the switch. Rate Use these scre[...]

Chapter 4 The Web Configurator ES-1552 User’s Guide 47 Figure 17 Change Administr ator Login Password 4.4 Saving Y our Configuration When you are done mo difying the settings in a screen, click Apply to save your changes back to the switch. 4.5 Switch Lockout Y ou could block yourself (and all others) from using the web configurator if you: 1 Rem[...]

Chapter 4 The Web Configurator ES-1552 User’s Guide 48 Figure 18 Web Configu r ator: Logout Link 4.8 Help The web configur ator ’ s online help ha s descriptions of indi vidual screens and some supplementary information. Click the Help link from a web configurator screen to view an online help description of that screen.[...]

ES-1552 User’s Guide 49 C HAPTER 5 System This chapter describes the system screens. 5.1 System Screen The home screen of the web configurator displa ys general system information and allows you to perform system maintenance. Click System > S tatus in the navigation panel to view device specific information such as system name, firmware versio[...]

Chapter 5 System ES-1552 User’s Guide 50 5.1.1 Configure IP Address Use the Configure IP Addr ess sc reen to set up the IP addr ess manually . The following screen appears when you click the existing IP address in the System > S tatus screen. Figure 20 Configure IP Address The following table describes the labels in this screen. 5.1.2 Layer 2 [...]

Chapter 5 System ES-1552 User’s Guide 51 Select the Enable L2 T able Aging checkbox and enter the amount of time in seconds (up to 1048575) that the switch remembers MAC addres s entries. Select “0” to disable L2 table aging. Click Apply to save your configuration changes. 5.1.3 Backup Settings Backing up your switc h configuration s allows y[...]

Chapter 5 System ES-1552 User’s Guide 52 5.2 System: Change Password Use the Change Password screen to change the administrator user name and password for the switch. Click System > Password to view the screen as shown. Figure 24 System: Password The following table describes the labels in this screen. 5.3 Firmware Upgrade Make sure you have d[...]

Chapter 5 System ES-1552 User’s Guide 53 Figure 25 Firmware Upg rade T ype the path and file name of the firmware f ile you wish to upload to the switch in the File Path text box or click Br owse to locate it. After you have specified the file, click Upgrade . After the firmware upgrade process is complete, see the System > S tatus screen to v[...]

Chapter 5 System ES-1552 User’s Guide 54[...]

ES-1552 User’s Guide 55 C HAPTER 6 Port Settings This chapter describes how to view and co nfigure the port settings on the switch. 6.1 Port S t atus Use this screen to view switch port settings. Click System > Port in the navigation panel to display the Port S tatus screen. Figure 27 Port S tatus[...]

Chapter 6 Port Settings ES-1552 User’s Guide 56 The following table describes the labels in this screen. 6.2 Port Configuration Use this screen to configure individual po rt settings.Cli ck a port number in the Port S tatus screen to access this screen. Figure 28 Port Configuration The following table describes the labels in this screen. T able 8[...]

Chapter 6 Port Settings ES-1552 User’s Guide 57 Flow Control A concentration of traffic on a port decreases port bandwidth and overflows buffer memory causing packet discards and frame losses. Flow Control is used to regulate transmission of signals to match the bandwidth of the receiving port. The switch uses IEEE802.3x flow control in full dupl[...]

Chapter 6 Port Settings ES-1552 User’s Guide 58[...]

ES-1552 User’s Guide 59 C HAPTER 7 System and Port Statistics This chapter describes the overview and individual port stat istics screens. 7.1 Overview The statistics screen of th e web configurator disp lays a port statistical summary with links to each port showing statistical details. 7.2 St atistics Summary Click St a t i s t i c s in the nav[...]

Chapter 7 System and Port Stat istics ES-1552 User’s Guide 60 7.3 Port S t atistics Click a number in the Port column in the S tatistics screen to display individual port statistics. Use this screen to check status and detailed performance data about an individual port on the switch. Figure 30 S tatus: Port Deta ils The following table describes [...]

Chapter 7 S ystem and Port Statistics ES-1552 User’s Guide 61 NonUnicastPkts This field shows the numb er of no nunicast packets transmitted. Discards This field show s the number discarde d (dropped) packets. Errors This field shows the number of packets for which transmission failed because of excessive collision. QLength This field shows the n[...]

Chapter 7 System and Port Stat istics ES-1552 User’s Guide 62 512-1023 ByteP kts This field shows the number of packet s (including bad packets) received that were between 512 and 1023 octets in length. 1024-1518 ByteP kts This field shows the number of packet s (including bad packets) received that were between 10 24 and 1522 octets in length. T[...]

ES-1552 User’s Guide 63 C HAPTER 8 VLAN This chapter shows you h o w to configure IEEE 802.1 Q tagged VLANs. 8.1 Introduction to IEEE 802.1Q T agged VLANs A tagged VLAN uses an explicit tag (VLAN ID) in the MAC header to identify the VLAN membership of a frame across bridges - they are not confined to the switch on which they were created. The VL[...]

Chapter 8 VLAN ES-1552 User’s Guide 64 8.2 St atic VLAN Use a IEEE 802.1Q VLAN to deci de whether an incoming frame on a port should be • sent to a VLAN group as normal d epending on its VLAN tag. • sent to a group whether it has a VLAN tag or not. Y ou can also tag all outgoing frames (that we re previously untagged) from a port with the spe[...]

Chapter 8 VLAN ES-1552 User’s Guide 65 8.2.2 Create IEEE 80 2.1Q VLAN Screen See Section 8.1 on page 6 3 for more informa tion on VLANs. Click VLAN in the navigation panel to display th e IEEE 802.1Q VLAN screen as shown next. Figure 32 VLAN: Create VLAN The following table describes the labels in this screen. 8.2.3 Edit IEEE 802.1Q VLAN Screen S[...]

Chapter 8 VLAN ES-1552 User’s Guide 66 Figure 33 VLAN: Edit VLAN The following table describes the labels in this screen. T able 14 VLAN: Edit VLAN LABEL DESCRIPTION VLAN ID Select which VLAN you want to configure. Click Remo ve This VLAN to remove this VLAN from the switch. Note: VLAN 1 cannot be removed. Display All VLAN Click this button to go[...]

ES-1552 User’s Guide 67 C HAPTER 9 Trunking This chapter shows you how to logically aggreg ate physical links to form one logical, high er- bandwidth link. 9.1 T runking Overview T runking is the grou ping of physical ports into one logical hig her-capacity link. Y ou ma y want to trunk ports if for exampl e, it is cheaper to use multiple lower-s[...]

Chapter 9 Trunking ES-1552 User’s Guide 68 Figure 34 T runk Setting The following table describes the labels in this screen. T able 15 T runking: Configuration LABEL DESCRIPTION Distribution Criterion T runking us es a distribution algori thm to balance tra ffic between trunk members. Select the traffic distribution algorithm be tween trunk memb [...]

ES-1552 User’s Guide 69 C HAPTER 10 Mirroring This chapter discusses port mirroring. 10.1 Port Mirroring Settings Port mirroring allows you to copy traffic flow to a monito r port (the port you copy the traf fic to) in order that you can examine the traffi c from the mirrored port without interference. Click Mirr or in the navigation panel to dis[...]

Chapter 10 Mirr oring ES-1552 User’s Guide 70[...]

ES-1552 User’s Guide 71 C HAPTER 11 QoS This chapter introduces the quality of servi ce (QoS) parameters yo u can configure on the switch. 1 1.1 QoS Overview QoS is used to help solve perfo rma nce degradation when there is network cong estion. Us e the QoS Setting screen to configure queuing algo rithms for outgoing traffic. Queuing algorithms a[...]

Chapter 11 QoS ES-1552 User’s Guide 72 1 1.2 QoS Enhancement Y ou can configure the switch to prioritize traffi c even if the incoming packets are not ma rked with IEEE 802.1p priority tags or change the existing priority tags ba sed on the criteria you select. The switch allows you to choose one of the following methods for assigning priority to[...]

Chapter 11 QoS ES-1552 User’s Guide 73 The following table describes the labels in this screen. 1 1.3.1 Change Number of Queues Use the Change Number of Queues screen to edit the number of queues on the switch. Click Change in the QoS Setting screen to view the following screen. Figure 37 Change Number of Queues Select the number of queues from t[...]

Chapter 11 QoS ES-1552 User’s Guide 74 1 1.4 Advanced QoS Settings The following sections describe additional methods for setting pr iority for incoming packets on the ports. The switch allows you to choose one of th e following methods: " Advanced QoS methods only affect the in ternal priority queue mapping for the switch. The switch does n[...]

Chapter 11 QoS ES-1552 User’s Guide 75 The following table describes the labels in this screen. 1 1.4.2 DSCP Based QoS The switch allows you to create a mapping table between Differen tiated Services Code Points (DSCPs) tags and IEEE 802.1p prio rity tags. 1 1.4.3 Differentiated Services Code Point (DSCP) Overview Differentiated Services (Dif fSe[...]

Chapter 11 QoS ES-1552 User’s Guide 76 Figure 39 DSCP Based QoS The following table describes the labels in this screen. 1 1.4.5 T oS Based QoS Y ou can configure the switch to assign a IEEE 80 2.1p priority to pack ets coming into the switch with T ype of Service (T oS) priority assigned to them. Select T oS Based QoS in the QoS Enhancement Sett[...]

Chapter 11 QoS ES-1552 User’s Guide 77 Figure 40 T oS Based QoS The following table describes the labels in this screen. 1 1.4.6 IP Address Based QoS Y ou can configure the switch to assign a higher priority to packets coming into the switch from specific IP addresses. Select IP Address Based QoS in the QoS Enhancemen t Setting screen to view the[...]

Chapter 11 QoS ES-1552 User’s Guide 78 Figure 41 IP Address Based QoS The following table describes the labels in this screen. T able 21 IP Addres s Based QoS LABEL DESCRIPTION Mode Select IP Addres s Based QoS to give higher or lower priority to packets coming into the switch from a specified source IP address. Add Entry Enter the IP address an [...]

ES-1552 User’s Guide 79 C HAPTER 12 Port Rate Limit and Storm Control This chapter shows you how you can manage ba ndwidth on each port a nd set up broadcast storm control settings using the Port Rate and S torm Control screens. 12.1 Port Rate Screen Rate control means defining a maximum allowable bandwid th for incoming and/or out-going traffic [...]

Chapter 12 Po rt Rate Li mit and Stor m Control ES-1552 User’s Guide 80 The following table describes the re lated labels in this screen. 12.1.1 Rate Limit Screen Click a port number in the Port Rate screen to bring up the screen as shown next. Figure 43 Rate Limit Configuration The following table describes the re lated labels in this screen. T [...]

Chapter 12 Port Rate Li mit and Storm Control ES-1552 User’s Guide 81 12.1.2 Broadcast St orm Control Setup Broadcast storm control limits the nu mber of broadcast, multicast and unknown unicast (also referred to as Destinatio n Lookup Failure or DLF) packets the swit ch receives per second on the ports. When the ma ximum number of allo wable bro[...]

Chapter 12 Po rt Rate Li mit and Stor m Control ES-1552 User’s Guide 82 Figure 44 Broadcast S torm Co ntrol The following table describes the labels in this screen. T able 24 Broadcas t S torm Co ntrol LABEL DESCRIPTION Port Select the port numbe r for which you want to configure storm control settings or select Apply settings to all ports to con[...]

ES-1552 User’s Guide 83 C HAPTER 13 Layer 2 (L2) Management Use these screens to add, delete and view entries in the Layer 2 (L2) address table. 13.1 Configuring L2 Management Layer 2 (L2) management refers to management based on the Media Access Co ntrol (MAC) address of networking devices. A static Me dia Access Control (MAC) address is an addr[...]

Chapter 13 Layer 2 (L 2) Management ES-1552 User’s Guide 84 13.1.1 Add a S tatic MAC Address Entry Click Add in the L2 Address Management screen to display the configuration screen as shown. Figure 46 Add a S tatic MAC Entry The following table describes the labels in this screen. 13.2 V iewing the L2 Address T able Use the L2 Address T able scre[...]

Chapter 13 Layer 2 (L2 ) Management ES-1552 User’s Guide 85 Figure 47 Display L2 Address T able The following table describes the labels in this screen. T able 27 Display L2 Address T able LABEL DESCRIPTION Reload Address T able Click this to update all the fields in the L2 Address table. Item This is the i ndex number of the MAC address entry . [...]

Chapter 13 Layer 2 (L 2) Management ES-1552 User’s Guide 86[...]

ES-1552 User’s Guide 87 C HAPTER 14 Cable Diagnostics This chapter explains the Cable Diagnostics screen. 14.1 Diagnostics Overview The cable diagn ostics functi on works with systems using CA T -5 twisted-pair cables. The switch can perform basic cable diagnost ics. Click Cable Diagnostic in the navigation panel to view the screen as shown. Figu[...]

Chapter 14 Cable Diagnostics ES-1552 User’s Guide 88[...]

ES-1552 User’s Guide 89 C HAPTER 15 Auto Denial of Service (DoS) This chapter shows you how to configure auto matic Denial of Service prevention on the switch. 15.1 About Denial of Service Att acks Denial of Service (DoS) attacks try to disable a device or netw ork so users no long er have access to network resources. The switch has f eatures whi[...]

Chapter 15 Auto Deni al of Service (DoS) ES-1552 User’s Guide 90 15.2 Global Auto DoS Att ack Prevention Use the Global Auto DoS Attack Prevention screen to configure DoS attack prevention settings for the switch. Click Auto DoS in the navigation panel to op en the following screen . Figure 49 Global Auto DoS Atta ck Prevention The following tabl[...]

Chapter 15 Auto Denial of Service (DoS) ES-1552 User’s Guide 91 Figure 50 Advanced Auto DoS Att ack Prevention The following table describes the labels in this screen. T able 31 Advanced Auto DoS Attack Prevention LABEL DESCRIPTION Global Click this link to view th e Global Auto DoS Attack Preven tion screen. Port Select the port you w ant to con[...]

Chapter 15 Auto Deni al of Service (DoS) ES-1552 User’s Guide 92[...]

ES-1552 User’s Guide 93 C HAPTER 16 Auto VoIP This chapter shows you h o w to give higher prio rity to V oice over Internet Protocol (V oIP) packets over other data packets as they pass through the switch. 16.1 About Auto V oIP V oice over Internet Protocol (V oIP) allows t e lephone calls to be made over a data network like the Internet. W ith t[...]

Chapter 16 Auto VoIP ES-1552 User’s Guide 94 Figure 51 Auto V oIP Settings The following table describes the labels in this screen. T able 32 Auto V oIP Settings LABEL DESCRIPTION Profiles Select Disable if you don’t want to give hi gher priority to V oIP traffic or select IP Phone to give the highest priority to SIP , MGCP and SCCP packets p a[...]

95 P ART III Management and T roubleshooting Event Logging (97) SNMP (105) RMON-Lite (1 19) Dynamic ARP (135) T roubleshooting (139)[...]

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ES-1552 User’s Guide 97 C HAPTER 17 Event Logging This chapter shows you different ways to inspect logs and how to configure an external log server . 17.1 Event Logging Overview Y ou can configure the switch to save specifi c events in four different log tar gets: RAM - This log is saved into the switch’ s vola tile memory . The logs are cleare[...]

Chapter 17 Event Logging ES-1552 User’s Guide 98 The following table describes the labels in this screen. 17.3 Logging: Add Server Use this screen to configure a new syslog entry . Click Add Server in the Logging scre en to view the screen as shown. Figure 53 Logging: Add Server The following table describes the labels in this screen. T able 33 L[...]

Chapter 17 Even t Logging ES-1552 User’s Guide 99 17.4 V iewing RAM and Flash Logs Use these screens to view or expo rt RAM or Flash logs. Click the RAM or Flash link in the Logging screen to view the following screen ( Logs - RAM is shown he re). Y ou can also click RAM Logs or Flash Logs in the navigation panel to view the Logs - RAM or Logs - [...]

Chapter 17 Event Logging ES-1552 User’s Guide 100 17.5 Searching RAM and Flash Logs Use these screens to search RAM or Flash lo gs based on leve l and category . Click the Search link in the Logs - RAM or Logs - Fl ash scre en to view the screen as shown. Level This field displays the severity level of the log event. Th e possible severity le vel[...]

Chapter 17 Even t Logging ES-1552 User’s Guide 101 Figure 55 Searching: RAM/Flash Logs[...]

Chapter 17 Event Logging ES-1552 User’s Guide 102 The following table describes the labels in this screen. 17.5.1 Search Result s The Search Results - RAM/Flash screen displays the results of your log query . Click Submit in the Logs - Search sc reen to view the logs which match your search criteria. Figure 56 Logs: Search Result s The following [...]

Chapter 17 Even t Logging ES-1552 User’s Guide 103 Category This fiel d displays what categ ory the log entry fits. The categories are based on software and hardware features of the switch. For example the categ ory AUTODOS records events which deal with the Auto D enial of Service features you set up and the category SYSTEM record s events which[...]

Chapter 17 Event Logging ES-1552 User’s Guide 104[...]

ES-1552 User’s Guide 105 C HAPTER 18 SNMP This chapter describes how to user Simple Netw ork Management Protocol (SNMP) to manage and monitor the switch. 18.1 About SNMP Simple Network Management Protocol (SNMP) is an application layer protocol us ed to manage and monitor TCP/IP-based devices. SNMP is used to exchange management information betwe[...]

Chapter 18 SNMP ES-1552 User’s Guide 106 SNMP itself is a simple request/response prot ocol based on the manager/agent model. The manager issues a request and the agent retu rns responses using the following protocol operations: 18.1.1 Supported MIBs MIBs let administrators collect statisti cs and monitor status and pe rformance. The switch suppo[...]

Chapter 18 SNMP ES-1552 User’s Guide 107 In addition, SNMP managers can also be re quired to authenticate with agents before conducting SNMP management sessions. " SNMP v3 is enabled when you create SNMP groups and users. Once SNMP v3 is enabled, you must configure unique SNMP co mmunities for SNMP v1 and/or SNMP v2c access. 18.1.4 SNMP Engi[...]

Chapter 18 SNMP ES-1552 User’s Guide 108 Figure 59 SNMP Group The following table describes the labels in this screen. 18.2.1 SNMP Group: Create Use the SNMP Group: Create scre en to add an SNMP group. Click on the Create New Group link in the SNMP Gr oup screen. The screen displays as shown. Figure 60 SNMP Group: Create T able 41 SNMP Group LABE[...]

Chapter 18 SNMP ES-1552 User’s Guide 109 The following table describes the labels in this screen. 18.2.2 SNMP Group: Modify Click on the Group ID number or select a Group ID from the Group ID drop down list box in the SNMP Group screen to modify the settin gs of an existing group. Figure 61 SNMP Group: Modify The following table describes the lab[...]

Chapter 18 SNMP ES-1552 User’s Guide 11 0 18.3 SNMP User An SNMP user is an SNMP manager . SNMP ma nagers must use the proper SNMP user and group credentials to gain access to and manage agents s uch as the switch. Use the SNMP User screen to create SNMP users and associate them to SNMP groups. Click SNMP > User to view the screen as shown. Fi[...]

Chapter 18 SNMP ES-1552 User’s Guide 111 Figure 63 SNMP User: Create The following table describes the labels in this screen. 18.3.2 SNMP User: Modify Click on the User ID number or select a User ID from the User ID drop down list box in the SNMP User screen to modify the settings of an existing user . Figure 64 SNMP User: Modify T able 45 SNMP U[...]

Chapter 18 SNMP ES-1552 User’s Guide 11 2 The following table describes the labels in this screen. 18.4 SNMP Community SNMP communities act like passwords and are used to define the security parameters of SNMP clients in an SNMP v1 and SNMP v2c environments. The default SNMP community is “public” for both SNMP v1 and SNMP v2 c before SNMP v3 [...]

Chapter 18 SNMP ES-1552 User’s Guide 11 3 18.4.1 SNMP Community: Create Click on the Cr e ate New Community link in the SNMP Community screen to add an SNMP community . The screen displays as shown. Figure 66 SNMP Community: Create The following table describes the labels in this screen. Community St r i n g This field indicates the SNMP communit[...]

Chapter 18 SNMP ES-1552 User’s Guide 11 4 18.4.2 SNMP Community: Modify Click on the Community ID number or select a Community ID from the Community ID drop down list box in the SNMP Community screen to modify the settings of an existing community . Figure 67 SNMP Community: Modify The following table describes the labels in this screen. 18.5 SNM[...]

Chapter 18 SNMP ES-1552 User’s Guide 11 5 Figure 68 SNMP Notification The following table describes the labels in this screen. 18.6 SNMP T rap S t ation SNMP traps are used to send out SNMP notifications of ur gent or normal events in the system to external management stations. Use the SNMP T rap S tation screen to enable the sending of SNMP trap[...]

Chapter 18 SNMP ES-1552 User’s Guide 11 6 Figure 69 SNMP T rap S tation The following table describes the labels in this screen. 18.6.1 SNMP T rap St ation: Create Click on the Create New T rap S tation link in the SNMP T rap S tation screen to add an SNMP T rap Station. The screen displays as shown. Figure 70 SNMP T rap S tation: Crea te T able [...]

Chapter 18 SNMP ES-1552 User’s Guide 11 7 The following table describes the labels in this screen. 18.6.2 SNMP T rap St ation: Modify Click on the T rap S tation ID number or select a Tr a p S t a t i o n I D from the T rap S tation ID drop down list box in the SNMP T rap S tatio n screen to modify the settings of an existing trap station. Figure[...]

Chapter 18 SNMP ES-1552 User’s Guide 11 8[...]

ES-1552 User’s Guide 11 9 C HAPTER 19 RMON-Lite This chapter explains how to configure the RMON-Lite screens. 19.1 RMON-Lite Overview The Remote Network Monitoring Management Information Base (RMON MIB) defines objects for managing remote network monitoring devices. The remote network monitoring devices, referred to as monitors or probes , are us[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 120 Figure 72 RMON S t atistics: Overview The following table describes the labels in this screen. T able 54 RMON Statistic s: Overview LABEL DESCRIPTION RMON MIB Ta b l e : Use this drop down list box to select the MIB table you want to view . Click Apply to refresh the screen to the selected MIB table v[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 121 19.3 RMON-Lite S tatistics: Port Use this screen to enable statistics gat hering a nd view the statistics for individual ports. Click on a port number in the RMON S tatistics: Overview s creen to view the screen as shown. Figure 73 RMON S tatistics: Port The following table describes the labels in thi[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 122 19.4 RMON-Lite History MIB RMON-Lite History MIB configuration is divid ed into two parts: [2] History Control an d [2] History S tatistics . • Use the [2] History Control screens to view and define the statistical sampling of data from activity in your network. S tatistical sam pling is controlled [...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 123 Figure 74 RMON History Control: Overview . The following table describes the labels in this screen. 19.4.2 RMON History Control: Modify Use the RMON History Control: Modify screen to define the statistical sampling of data from activity in your network. Click an index number in the RMON History Contro[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 124 Figure 75 RMON History Control: Modify The following table describes the labels in this screen. 19.4.3 RMON History St atistics: Overview Use the RMON History S tatistics: Overview screen to view the results of statistical sampling on the ports. Select [2] History S tatistics from the RMON MIB T able:[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 125 Figure 76 RMON History S tatistics: Overview . The following table describes the labels in this screen. 19.4.4 RMON History St atistics: Control Use the RMON History S tatistics: Contr ol screen to view the de tails of each polling sample collected for the history control index entries you configured.[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 126 Figure 77 RMON History S tatistics: Control The following table describes the labels in this screen. T able 59 RMON History Statistics: Control LABEL DESCRIPTION RMON MIB Ta b l e : Use this drop down list box to select the MIB table you want to view . Click Apply to refresh the screen to the selected[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 127 19.5 RMON Alarm: Overview Use the RMON Alarm: Overview screen to view configured alarms that oc cur when the sampled data exceeds the specified thr eshold. T o open this screen select [3] Alarm in the RMON MIB T able: drop down list box in the RMON-Lite screen. Figure 78 RMON Alarm: Overview . The fol[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 128 19.5.1 RMON Alarm: Create New Alarm Use the RMON Alarm: Create New Alarm screen to configure RMON ala rms. Click Create new Alarm view the screen as shown. Y ou can also click an al arm index entry in the RMON Al arm: Overview screen to edit an existing alarm configuration. " The RMON Alarm: Modi[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 129 The following table describes the labels in this screen. 19.6 RMON Event: Overview Use the RMON Event: Overview screen to view and delete ev ent entries configured on the switch. Select [9] Event from the RMON MIB T able: drop down listbox in the RMON -Lite screen to view the screen as shown. Figure 8[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 130 The following table describes the labels in this screen. 19.6.1 RMON Event: Create New Event Use the RMON Event: Create and the RMON Event: Modify screens to configure RMON events. Click Create new Event in the RMON Event: Overview screen to view the screen as shown. Y ou can also click an ev ent inde[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 131 Figure 81 RMON Event: Create New Event The following table describes the labels in this screen. 19.7 RMON Event Log: Overview Use the RMON Event Log: Overview screen to vi ew the event log entries gene rated on the switch. All the entries in this table are gene rat e d by the RMON-Lite probe when the [...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 132 Select [9] Event Log in the RMON MIB T able: drop down list box in any RMON Lite screen to view the screen as shown. Figure 82 RMON Event Log: Ov erview . The following table describes the labels in this screen. 19.7.1 RMON Event Log: Event Use the RMON Event Log: Event screen to view the deta ils of [...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 133 The following table describes the labels in this screen. T able 65 RMON Ev ent Log: Eve nt LABEL DESCRIPTION RMON MIB Ta b l e : Use this drop down list box to select the MIB table you want to view . Click Apply to refresh the screen to the selected MIB table view . Refresh Click this to update all th[...]

Chapter 19 RMON-Lite ES-1552 User’s Guide 134[...]

ES-1552 User’s Guide 135 C HAPTER 20 Dynamic ARP This chapter describes how to activate dynamic Address Resolution Protocol (ARP) learning and how to enter static ARP table entries. 20.1 ARP T able Overview Address Resolution Protocol (ARP) is a prot ocol for mapping an Internet Protocol address (IP address) to a physical machine address, al so k[...]

Chapter 20 Dynam ic ARP ES-1552 User’s Guide 136 Figure 84 Dynamic ARP The following table describes the labels in this screen. T able 66 ARP Table LABEL DESCRIPTION Enable Dynamic ARP Select or deselect this to activate or deactivate Dynamic ARP on the switch. Note: Y ou must activate dynamic ARP first if you want to add static ARP table entries[...]

Chapter 20 Dynamic ARP ES-1552 User’s Guide 137 20.3 V iewing ARP T able Entries Click Dynamic ARP > ARP Entries in the navigation panel to open the following screen. Use this screen to view and add entries to the ARP table. Figure 85 Viewing ARP T able Entries The following table describes the labels in this screen. 20.4 Adding ARP T able Ent[...]

Chapter 20 Dynam ic ARP ES-1552 User’s Guide 138 The following table describes the labels in this screen. T able 68 ARP Table LABEL DESCRIPTION MAC Address (XX-XX-XX- XX-XX-XX) Enter the MAC address in 6 pair hexadecimal format of the n etwork device you want to be allowed to communicate vi a the switch. An example entry of a MAC address is “0a[...]

ES-1552 User’s Guide 139 C HAPTER 21 Troubleshooting This chapter covers potential problems and possible remedies. 21.1 Problems St arting Up the Switch 21.2 Problems Accessing the Switch 21.2.1 Pop-up Windows, Ja vaScript s and Java Permissions In order to use the web configurator you need to allow: • W eb browser pop-u p windows from your dev[...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 140 " Internet Explorer 6 screens are used here. Screens for other Internet Explorer versions may vary . 21.2.1.1 Internet Explorer Pop -up Blockers Y ou may have to disable pop-up blocki ng to log into your device. Either disable pop-up blocking (enabl ed by default in W indows XP SP (Service[...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 141 Figure 88 Internet Options 3 Click Apply to save this setting. 21.2.1.1.2 Enable pop-up Blockers with Exceptions Alternatively , if you only want to allow pop-up window s from your device, see the following steps. 1 In Internet Explorer , select To o l s , Internet Options and then the Privacy [...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 142 Figure 89 Internet Options 3 T ype the IP address of your device (the web page that you do not want to have blocked) with the prefix “http://”. For example, http://192.168.1.1. 4 Click Add to move the IP address to the list of Allowed sites . Figure 90 Pop-up Blocker Settings 5 Click Close [...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 143 6 Click Apply to save this setting. 21.2.1.2 JavaScript s If pages of the web configura tor do not display properly in Internet Explorer, check that JavaScripts are allowed. 1 In Internet Explorer , click T ools , Internet Options and then the Security tab. Figure 91 Internet Options 2 Click th[...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 144 Figure 92 Security Setting s - Java S cripting 21.2.1.3 Java Permissions 1 From Internet Explorer , click To o l s , I nternet Options and then the Security tab. 2 Click the Custom Level... button. 3 Scroll down to Microsoft VM . 4 Under Java permissions make sure that a safety leve l is select[...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 145 21.2.1.3.1 JA V A (Sun) 1 From Internet Explorer , click To o l s , I nternet Options and then the Advance d tab. 2 make sure that Use Java 2 for <applet> u nder Ja va (Sun) is selected. 3 Click OK to clos e the window . Figure 94 Java (S un)[...]

Chapter 21 Trou bleshooting ES-1552 User’s Guide 146[...]

147 P ART IV Appendices and Index This part contains th e following chapters. • Product Specification s (149) • IP Addresses and Subnetting (151) • Legal Information (161) • Customer Support (165) • Index (169)[...]

148[...]

ES-1552 User’s Guide 149 A PPENDIX A Product S pecifications This section describes the general software features of the switch. T able 71 Firmwa re Featur es FEATURE DESCRIPTION VLAN A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multi ple logical netw orks. Devices on a l ogical network belong to one group.[...]

Appendix A Product Specifications ES-1552 User’s Guide 150 The following tables list th e product specifications. Dynamic ARP Dynamic ARP allows you to fi lter incoming traffic based on the MAC to IP address mapping. The switch can be configured to only allo w trusted devices to communic ate via its ports. RMON-Lite Remote Ne twork Monitoring Man[...]

Appendix A Product Specifications ES-1552 User’s Guide 151 T able 73 Management Specifications System Control Alarm/S tatus surveillance LED indication for power status Performance monitoring Line speed Four RMON groups (history , statistics, alarms, and events) Throughput monitoring Port mirroring and aggreg ation Firmware upgrade an d download [...]

Appendix A Product Specifications ES-1552 User’s Guide 152[...]

ES-1552 User’s Guide 153 A PPENDIX B IP Addresses and Subnetting This appendix introduces IP addresses and subnet masks. IP addresses identify ind ividual devices on a network. Every networking device (includin g computers, servers, routers, printe rs, etc.) ne eds an IP address to communicate across the network. These networking devices a re als[...]

Appendix B IP Addre sses and Subnetting ES-1552 User’s Guide 154 Figure 95 Network Num ber and H ost ID How much of the IP address is the network number and how much is the host ID varies according to the s ubnet mask. Subnet Masks A subnet mask is used to dete rmine which bits are part of th e network number , and which bits are part of the host[...]

Appendix B IP Addresses and Subnetting ES-1552 User’s Guide 155 Subnet masks are expressed in dotted decimal no tation just like IP addresses. The follow ing examples show the binary and decimal not ation for 8-bit, 16-bit, 24-bit an d 29-bit subnet masks. Network Size The size of the network number determines the maximum number of possible hosts[...]

Appendix B IP Addre sses and Subnetting ES-1552 User’s Guide 156 Subnetting Y ou can use subnetting to divide one network into multiple sub-networks. In the following example a network administrator creates two sub-networks to isolate a group of servers from the rest of the c ompany network for security reasons. In this example, the company netwo[...]

Appendix B IP Addresses and Subnetting ES-1552 User’s Guide 157 Figure 97 Subnetting Example: After Subnetting In a 25-bit subnet the host ID has 7 bits , so each sub-network has a maximum of 2 7 – 2 or 126 possible hosts (a host ID of all zeroes is the subnet’ s address itself, all ones is the subnet’ s broadcast address). 192.168.1.0 with[...]

Appendix B IP Addre sses and Subnetting ES-1552 User’s Guide 158 Example: Eight Subnet s Similarly , use a 27-bit mask to create eight subnets (000, 00 1, 010, 01 1, 100, 101, 1 10 and 111 ) . The following table shows IP address last octet values for each subnet. T able 80 Subnet 2 IP/SUBNET MASK NETWORK NUMBER LAST OCTET BI T VA L U E IP Addres[...]

Appendix B IP Addresses and Subnetting ES-1552 User’s Guide 159 Subnet Planning The following table is a summary for su bnet planning on a network with a 24-bit network number . The following table is a summary for su bnet planning on a network with a 16-bit network number . 5 128 129 158 159 6 160 161 190 191 7 192 193 222 223 8 224 225 254 255 [...]

Appendix B IP Addre sses and Subnetting ES-1552 User’s Guide 160 Configuring IP Addresses Where you obtain your netwo rk number depends on your particular situation. If the ISP or your network administrator assigns yo u a bloc k of registered IP addresses, follow their instructions in selecting the IP addresses and the subnet mask. If the ISP did[...]

ES-1552 User’s Guide 161 A PPENDIX C Legal Information Copyright Copyright © 2007 by ZyXEL Communications Corporation. The contents of this publication may not be reprod uced in any part or as a whole, transcribed, stored in a retrieval system, tran slated into any language, or transmitted in any form or by any means, el ectronic, mechanical , m[...]

Appendix C Legal Info rmation ES-1552 User’s Guide 162 FCC W arning This device has been tested and foun d to comply with the limits for a Class A digital switch, pursuant to Part 15 of the FCC Rules. Thes e limits are designed to provide reasonable protection against harmful interference in a co mmercial environment. Thi s device generates, uses[...]

Appendix C Legal Infor mation ES-1552 User’s Guide 163 condition. Any replacement will consist of a ne w or re-manufactured f unctionally equivalent product of equal or higher value, and will be so lely at the discretion of ZyXEL. This warranty shall not apply if the product has been modified, misused, tamp ered with, damaged by an act of God, or[...]

Appendix C Legal Info rmation ES-1552 User’s Guide 164[...]

ES-1552 User’s Guide 165 A PPENDIX D Customer Support Please have the following information r eady when you contact customer support. Required Information • Product model and serial number . • W arranty Information. • Date that you received your de vice. • Brief description of the problem and the steps you took to solv e it. Corporate Hea[...]

Appendix D Custo mer Support ES-1552 User’s Guide 166 Denmark • Support E-mail: support@zyxel.dk • Sales E-mail: sales@zyxel.dk • T elephone: +45-39-55-07-00 • Fax: +45-39-55-07-07 • W eb Site: www .zyxel.dk • Re g u l a r M a i l : ZyXEL Communications A/ S, Columb usvej, 2860 Soeborg, Denmark Finland • Support E-mail: support@zyxe[...]

Appendix D Customer Support ES-1552 User’s Guide 167 • T elephone: +7-3272-590-698 • Fax: +7-327 2-590-689 • W eb Site: www .zyxel.kz • Re g u l a r Ma i l : ZyXEL Kazakhstan, 43, Dostyk ave.,Office 414, Dost yk Business Centre, 050010, Almaty , Republic of Kazakhstan North America • Support E-mail: support@zyxel.com • Sales E-mail: s[...]

Appendix D Custo mer Support ES-1552 User’s Guide 168 • W eb Site: www .zyxel.es • Re g u l ar M a il : ZyXEL Communications, Art e, 21 5ª planta, 28033 Madrid, Spain Sweden • Support E-mail: support@zyxel.se • Sales E-mail: sales@zyxel.se • T elephone: +46-31-744-7700 • Fax: +46-31-744-7701 • W eb Site: www .zyxel.se • Re g u l [...]

Index ES-1552 User’s Guide 169 Index A adding VLANs 65 Address Resolution Logic (ARL) table 50 Address Resolution Protocol (ARP) 135 allowing pop-up windows 139 alternative subnet mask notation 155 applications backbone 27 bridging 28 IEEE 802.1Q VLAN 29 switched workgroup 28 ARL (Address Resolution Logic) table 50 ARP how it works 135 viewing 13[...]

Index ES-1552 User’s Guide 170 Flash logs 97 flow control 57 back pressure 57 IEEE802.3x 57 forwarding based on MAC 84 front panel 35 G general features 150 getting help 48 H hardware installation 31 mounting 32 hardware overview 35 help, web configu rator 48 I IANA 160 ingress mirror 69 installation freest anding 31 precautions 32 rack-mounting [...]

Index ES-1552 User’s Guide 171 network management 151 network management system (NMS) 105 O open, cable fault 87 P passwor d 46 pop-up Windows, allowing 139 port details 60 port mirro ring 69 , 150 port security 89 overview 89 port settings 55 , 56 port statistics 59 ports mirroring 69 speed/duplex 56 power connector 38 power supply specifica tio[...]

Index ES-1552 User’s Guide 172 static MAC forwarding 83 , 84 status 44 LED 38 port details 53 , 60 VLAN 64 , 66 subnet 153 subnet mask 154 subnetting 156 switch lockout 47 switch reset 47 switching 150 syntax conventions 4 system control 151 system status 49 T tagged VLAN 63 trademarks 161 transceiver installation 36 removal 37 traps, SNMP 106 tr[...]