Enterasys ENTERASYS ATX manuale d’uso

A TX User ’ s Guide[...]

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i Notice Enterasys reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Enterasys to determine whether any such changes have been made. The hardwar e, firmware, or softwar e described in this manual is subject to change without notice. IN[...]

ii AppleT alk, Apple, Macintosh, and T okenT alk are r egistered trademarks; and Apple Remote Access and EtherT alk ar e trademarks of Apple Computer , Inc. SmartBoost is a trademark of American Power Conversion ST is a register ed trademark and C++ is a trademark of A T&T Banyan and VINES are r egistered trademarks of Banyan Systems, Inc. cisc[...]

iii ANNEX, ANNEX-II, ANNEX-IIe, ANNEX-3, ANNEX-802.5, MICRO-ANNEX-XL, and MICRO- ANNEX-ELS are trademarks of Xylogics, Inc. MAXserver and Xyplex are trademarks of Xyplex, Inc. Restricted Rights Notice (Applicable to licenses to the United States Government only .) 1. Use, duplication, or disclosure by the Government is subject to r estrictions as s[...]

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v Contents Chapter 1 Intr oduction Using the A TX Switch User ’s Guide .......................................................................... 1-2 Related Manuals ............................................................................................................ 1-2 Software Conventions ................................................[...]

Contents vi V iewing I/F Summary Information .................................................................. 2-23 Interface Performance Statistics/Bar Graphs ........................................... 2-25 V iewing Interface Detail .............................................................................. 2-26 Making Sense of Detail Statist[...]

1-1 Chapter 1 Intr oduction How to use this guide; related guides; softw are conv entions; getting help; A TX Switch firmware version inf or mation W elcome to the NetSight Element Manager for the A TX User ’s Guide . W e have designed this guide to serve as a simple refer ence for using NetSight Element Manager for the A TX Switch. The A TX Swi[...]

Introduction 1-2 Using the A TX Switch User’ s Guide Using the A TX Switch User’ s Guide Each chapter in this guide describes one major functionality or a collection of several smaller functionalities of the A TX Switch. This guide contains information about software functions which ar e accessed directly fr om the device icon; for information [...]

Software Con v entions 1-3 Introduction NetSight Element Manager User ’ s Guide NetSight Element Manager T ools Guide Network T r oubleshooting Guide Microsoft Corporation’s Microsoft Windows User ’ s Guide For more information about the capabilities of the A TX Switch, consult the appropriate har dware documentation. Software Con ventions Ne[...]

Introduction 1-4 Softw are Conv entions Figure 1-1. Sample W indow Showing Group Boxes Device Name Displays the user-defined name of the device. The device name can be changed via the System Group window; see the Generic SNMP User ’ s Guide for details. IP Address Displays the A TX Switch’s IP (Internet Protocol) Addr ess; this will be the IP [...]

Getting Help 1-5 Introduction The command buttons, for example , call up a menu listing the windows, screens, or commands available for that topic. Any menu topic followed by ... (three dots) — for example Statistics... — calls up a window or screen associated with that topic. Getting Help This section describes two differ ent methods of gettin[...]

Introduction 1-6 Getting Help FTP: ftp.ct r on.com (134.141.197.25) Login anonymous Password your email address By BBS: (603) 335-3358 Modem Setting 8N1: 8 data bits, 1 stop bit, No parity Send your questions, comments, and suggestions r ega r ding NetSight documentation to NetSight T echnical Communications via the following e-mail add r ess: Nets[...]

2-1 Chapter 2 The A TX Switc h Chassis Vie w Inf or mation displa y ed in the Chassis View windo w; the Chassis Manager window; Hub management functions The A TX Switch Chassis V iew window is the main scr een that immediately informs you of the current condition of individual ports on boar ds inserted in the A TX Switch chassis via a graphical dis[...]

The A TX Switch Chassis View 2-2 Viewing Chassis Inf ormation 2. Select Manage—>Node from the primar y window men u bar , or select the Manage Node toolbar button. or 1. In any map , list, or tree vie w , click the right mouse button once to select the A TX Switch you wish to manage . 2. On the resulting menu, clic k to select Manage . 3. Vie [...]

Viewing Chassis Inf ormation 2-3 The A TX Switch Chassis View Fr ont P anel Inf ormation The areas below the main module display ar ea provides the following device information: IP The Internet Protocol addr ess assigned to the A TX appears in the title bar of the Chassis V iew window; this field will display the IP address you have used to create[...]

The A TX Switch Chassis View 2-4 Viewing Chassis Inf ormation Boot Prom The revision of BOOT PROM installed in the A TX. Firmware The revision of device firmwar e stored in the A TX’s FLASH PROMs. Menu Structure By clicking on various areas of the A TX Switch Chassis V iew display , you can access menus with device-, module-, and port-level opti[...]

Viewing Chassis Inf ormation 2-5 The A TX Switch Chassis View The Device Men u From the Device Menu at the Chassis V iew window menu bar , you can access the following selections: • Device T ype... , which displays a window containing a description of the device being modeled. • System Group... , which allows you to manage the A TX Switch via S[...]

The A TX Switch Chassis View 2-6 Viewing Chassis Inf ormation For more information on the port display options available via this menu, see Selecting a Port Status V iew , page 2-8 . The Utilities Menu The Utilities menu provides access to the MIBT ree utility , which provides dir ect access to the A TX’s MIB information, and to the RMON utility [...]

Viewing Chassis Inf ormation 2-7 The A TX Switch Chassis View The Module Menu There is one module menu selection: • Module T ype... , which brings up a window containing a description of a module inserted in the A TX Switch; see V iewing Hardware T ypes , page 2-10 . The PPE P ort Menu The port r epresenting the A TX’s Packet Pr ocessing Engine[...]

The A TX Switch Chassis View 2-8 Viewing Chassis Inf ormation Selecting a P ort Status View T o change the status view of your ports: 1. Click on P or t Status on the menu bar at the top of the Chassis Vie w window; a menu will appear . 2. Drag down (and to the right, if necessar y) to select the status inf ormation you want to displa y . The por t[...]

Viewing Chassis Inf ormation 2-9 The A TX Switch Chassis View • ON if the port is currently forwar ding packets. • OFF if the port is not currently forwar ding packets. Load If you choose Load , the interface text boxes will display the percentage of network load processed by each port during the last polling interval. This percentage r eflect[...]

The A TX Switch Chassis View 2-10 Viewing Chassis Inf ormation The Chassis Manager Window Like most networking devices, Enterasys and Cabletron A TX Switch management modules draw their functionality from a collection of pr oprietary MIBs and IETF RFCs. In addition, many Enterasys and Cabletron intelligent devices – like the A TX Switch – organ[...]

Viewing Chassis Inf ormation 2-11 The A TX Switch Chassis View Choosing the Device T ype option on the Device menu brings up a window that tells you this is an A TX Switch. Figure 2-5. Device T ype W indow From the Module Menus in the Chassis V iew window , you can view a description of the module type. T o view the module type: 1. Click on the mod[...]

The A TX Switch Chassis View 2-12 Managing the Hub Figure 2-7. Sample Interface Description T ext Boxes Managing the Hub In addition to the performance and configuration information described in the preceding sections, the Chassis V iew also provides you with the tools you need to configure your A TX Chassis and keep it operating pr operly . Hub [...]

Managing the Hub 2-13 The A TX Switch Chassis View Figure 2-8. IPX Routing window Configuring IPX Routing on a port 1. Click on the IPX selection box to enab le IPX routing on the por t. 2. Enter the (he xadecimal) Nov ell network number of the Nov ell network connected to this por t in the IPX Netw ork field. The network number is a 4-byte LAN a[...]

The A TX Switch Chassis View 2-14 Managing the Hub 2(ethernet2) Ethernet2 frames are the same as 802.3 frames, except they use the third field (the length field in 802.3) to stor e a value repr esenting the type of transport packet that is encapsulated within the Ethernet packet. 3(ieee802.2) 802.2 is the default for non-Ethernet links. 802.2 fra[...]

Managing the Hub 2-15 The A TX Switch Chassis View Configuring the IP Address T able The IP Address Info section of this window displays the IP Addr esses and the subnet masks for each of the device’s interfaces that are configured for IP Routing. Y ou can enter the IP Addr ess and IP Mask for the current interface fr om this window . The IP Ad[...]

The A TX Switch Chassis View 2-16 Managing the Hub • Bootp Rela y — when enabled specifies that this por t will rela y BOOTP pack ets. BootP requests and replies are encapsulated in UDP datag rams. • IP Multicast — when enabled specifies that the internet Multicast Routing Protocol is to be used ov er this por t. Multicast Routing enab le[...]

Managing the Hub 2-17 The A TX Switch Chassis View T o set br oadcast protection: 1. In the Thresh Number field enter the maximum n umber of multicast pack ets that can be transmitted through the por t during each time inter v al. The def ault number of multicast pac kets that can be receiv ed in the specified time interval is 600,000 . 2. In the[...]

The A TX Switch Chassis View 2-18 Managing the Hub Figure 2-1 1. Bridge Configuration window Setting the Bridge Mode Depending on the modules installed in your A TX chassis the A TX ports can support up to three modes of bridging: T ransparent, Source Routing, and Sour ce Route T ranspar ent. • T ransparent — When the bridge port is set to T r[...]

Managing the Hub 2-19 The A TX Switch Chassis View T ransmitting BPDUs Y ou can configur e whether or not this port will transmit BPDUs (Bridge Protocol Data Units). BPDUs are used in the Spanning T ree process. Bridges communicate Spanning T r ee Algorithm information via BPDUs. W ith BPDUs, all network bridges collectively determine the current [...]

The A TX Switch Chassis View 2-20 Managing the Hub the Spanning T r ee Protocol and has it enabled on this port. Manual — Enable The port will always accept and propagate STE packets, regar dless of its port state. Manual — Disable The port will not accept or send STE packets; any STE packets received will be discar ded. Setting the Spanning T [...]

Managing the Hub 2-21 The A TX Switch Chassis View Y ou can set the translation for the following pr otocols from this window: IPX Framing By selecting the option Enable IPX T ranslation you can specify whether , when bridging Novell IPX frames, they are to be translated to Ethernet-like frame format. When you initially select this option, the IPX [...]

The A TX Switch Chassis View 2-22 Managing the Hub ARP Source Route This selection will specify what will occur when bridging ARP packets that are also source r outing explorer frames. The sour ce routing information can either be stripped or forwarded. Choose one of the following options for this field: pass-Rif (1) The ARP frame is bridged as is[...]

Managing the Hub 2-23 The A TX Switch Chassis View Using the Find Sour ce Address Feature Y ou can select the Find Sour ce Address option to discover which switching interface a specified source MAC addr ess is communicating through. When you select the Find Source Addr ess option, a search is made of the 802.1d Bridge Filtering Database to discov[...]

The A TX Switch Chassis View 2-24 Managing the Hub 2. Drag down to I/F Summary and release. The I/F Summary window , Figure 2-14 , will appear . Figure 2-14. I/F Summary W indow The I/F Summary window provides a variety of descriptive information about each interface on your device, as well as statistics which display each interface’s performance[...]

Managing the Hub 2-25 The A TX Switch Chassis View Interface P erformance Statistics/Bar Graphs The statistical values (and, where available, the accompanying bar graphs) to the right of the interface description fields provide a quick summary of interface performance. Y ou can select the statistical value you want to display and the units in whic[...]

The A TX Switch Chassis View 2-26 Managing the Hub Out Packets Packets transmitted, at the request of a higher level protocol, by the device interface to a subnetwork addr ess (both unicast and non-unicast). Out Discards Outbound packets that were discar ded by the device interface even though no errors wer e detected that would prevent them fr om [...]

Managing the Hub 2-27 The A TX Switch Chassis View Figure 2-15. Interface Detail W indow Three informational fields appear in the upper portion of the window: Description Displays the interface description for the currently selected interface: Ethernet. Address Displays the MAC (physical) address of the selected interface. T ype Displays the inter[...]

The A TX Switch Chassis View 2-28 Managing the Hub Discarded Displays the number of packets which were discar ded even though they contained no errors that would pr event transmission. Good packets are typically discarded to fr ee up buffer space when the network becomes very busy; if this is occurring routinely , it usually means that network traf[...]

Managing the Hub 2-29 The A TX Switch Chassis View T o calculate the per centage of inbound packets that were discar ded: Received Discards /Packets Received T o calculate the per centage of outbound packets that were discar ded: Transmit Discards /Packets Transmitted Enabling and Disab ling P orts From the Port menus on the A TX Chassis V iew wind[...]

The A TX Switch Chassis View 2-30 Managing the Hub[...]

3-1 Chapter 3 Using A TX T runking The T runking T able window; enab ling and disab ling trunking T runking, an extension of the 802.1D Spanning T ree protocol, allows you to increase aggr egate bandwidth when two or more switches ar e connected. A single 10BASE-T connection between switches yields 10 or 100 Mbps of bandwidth, depending on the spee[...]

Using A TX T runking 3-2 The P or t T r unking Windo w Figure 3-1. The T runking T able W indow The P or t T runking Window The Port T runking window featur es the trunking table (in the upper portion of the window), which displays the following information about each interface for which trunking is enabled: Index Displays the port’s strunkIfInde[...]

The P or t T r unking Windo w 3-3 Using A TX T runking • helddown — trunking is enabled, but the trunk connection has been r ejected. Indicates that an error has been detected and the link is being held out of service until the error condition clears. After a short time-out period, another attempt will be automatically initiated to establish a [...]

Using A TX T runking 3-4 The P or t T r unking Windo w • (9) self-connect — this port is connected to another port on the same device. This port cannot be used until the condition clears. • (10) port-moved — a differ ent port has been connected at the far end. The trunking pr otocol will restart. • (1 1) multiple-lan-types — several LAN[...]

The P or t T r unking Windo w 3-5 Using A TX T runking 802.1D Spanning T r ee takes about 30 seconds to resolve which A TX ports in a trunk gr oup are to become forwar ding ports. As ports within a trunk group become forwarding ports, traf fic within the trunk gr oup will be momentarily halted to guarantee the first-in, first-out ordering of Eth[...]

Using A TX T runking 3-6 The P or t T r unking Windo w[...]

4-1 Chapter 4 Using A TX P or t Filtering P or t filter tab le inf ormation; adding filters; viewing statistics The A TX lets you create custom filters to scr een data packets, and discard or forward traf fic based on the specified filter criteria. Y ou may have several r easons for creating filters — for example, to monitor traf fic patt[...]

Using A TX P or t Filter ing 4-2 • Port filters use the physical index number of a bridge port to determine whether traffic is to be scr eened at the port. These filters are useful for screening packets fr om being forwar ded onto a port’s attached segment. When you use Port filters in combination with Bridge Address T able entries, you can[...]

P or t Filters T able Inf or mation 4-3 Using A TX P or t Filter ing P or t Filter s T ab le Inf ormation The scrolling window at the top displays the filters defined for each port and provides the following information about them: Id (Identifier) An identifier assigned to each filter entry in the Port Filters table. This identifier is used t[...]

Using A TX P or t Filter ing 4-4 Editing the P or t Filters T able Destination Indicates the starting address of a filter based on a range of destination MAC addresses. Offset Indicates the hexadecimal offset of a data field filter designed to scr een packets based on a portion of the data field. Operator The Boolean operator in effect for this[...]

Editing the P or t Filters T able 4-5 Using A TX P or t Filter ing Adding a Ne w Filter The A TX allows you to create up to 100 Port filters (total for all connected ports). T o add a new filter to the A TX or modify a pr eviously configured Port Filter: 1. In the Po r t field, type in the interf ace number of the por t to which this filter wi[...]

Using A TX P or t Filter ing 4-6 Editing the P or t Filters T able flow as an aid in determining your network design or usage policies bef ore actually reconfiguring the network. • NO (the def ault) indicates that you w ant to create an actual filter . 4. Y ou can use Boolean AND/OR oper ators to logically link a series of filters together f [...]

Editing the P or t Filters T able 4-7 Using A TX P or t Filter ing 2.) Click to de-activ ate (gr ay-out) the Not In Range chec k bo x if you w ant to filter on source address values within the specified r ange. This is the def ault. c. Click in the Mask: te xt bo x and type in an address mask value that y ou want to apply to the source address ra[...]

Using A TX P or t Filter ing 4-8 Editing the P or t Filters T able 7. Y ou can use a data field v alue as a filter criteria by using the Field Offset parameters . A data field value allo ws you to e xamine a pac ket (at a location specified by a data Field Offset) f or up to 64 b ytes of data that will act as the filtering cr iteria. T o speci[...]

Editing the P or t Filters T able 4-9 Using A TX P or t Filter ing 4.) Select FRAME if you w ant the field offset v alue relative to the end of the Ether net frame type (regardless of whether or not the frame type is SNAP encapsulated). F or example , f or IP pack ets, a field offset of 0 indicates the star t of the IP header . e. If you w ant to[...]

Using A TX P or t Filter ing 4-10 Viewing Filter Statistics b . Click in the Threshold: text bo x, and enter the number of pack ets matching this filter that must be detected within the giv en inter val f or the trap to be generated. 10. Once you ha v e finished specifying the parameters f or the filter , clic k on Add . The filter and its para[...]

5-1 Chapter 5 W orkgr oup Configuration W orkgroups explained; adding and deleting w orkgroups from this window The virtual workgroups featur e of the A TX allows you to restrict multicast or broadcast traf fic from being pr opagated through every bridge port on your device. This optimizes bandwidth by limiting the subnet broadcast traf fic — [...]

W orkgroup Configuration 5-2 - If the A TX determines that the port does not belong to any workgroup configured for the received packet’s type, the packet will again be sent out through all other ports on the bridge that ar e in a Spanning T r ee Forwarding state. - If the A TX determines that the port is a member of a single workgroup configu[...]

5-3 W orkgroup Configuration If the workgroups ar e configured for an IPX network: 1. If the destination IPX network of the packet is zero, then all IPX workgroups for the r eceiving port are combined. 2. If the destination IPX network of the packet matches the IPX network defined for a workgroup, the br oadcast will be sent to port members of t[...]

W orkgroup Configuration 5-4 Configuring a Workgroup Y ou can both view existing workgr oups and configure new workgr oups from this window . The W orkgroup T able at the top of the window lists each existing workgroup along with its configuration information. The lower section of this window allows you to set-up the parameters of your workgrou[...]

Configuring a Workgroup 5-5 W orkgroup Configuration • IP Address — you must enter a network IP address f or the member por ts’ subnetwork. If the subnet identifier of the received pac ket’ s destination IP address matches the set workgroup IP address (when compared to any set IP Mask), the pac ket will only be f orw arded to the other m[...]

W orkgroup Configuration 5-6 Configuring a Workgroup[...]

6-1 Chapter 6 A TX P or t Mirr oring Using P or t MIrroring; configur ing por t mirror ing locally; configur ing por t mirror ing remotely The Port Mirroring utility allows you to captur e network traffic appearing on one or more of the A TX’s ports, and to r eproduce that traf fic on a designated “diagnostic” port for monitoring purposes[...]

A TX P or t Mirror ing 6-2 The P or t Mirroring Window Oversized packets might be produced when mirr ored traf fic is sent from an 802.5 interface to an 802.3 interface (i.e., an 802.5 frame, when mirror ed to an 802.3 interface, must have its MAC address r eversed and a length field must be added; the translation process may incr ease the frame [...]

The P or t Mirroring Window 6-3 A TX P or t Mirror ing Figure 6-1. The A TX Port Mirroring W indow The Port Mirroring window featur es a port selection area (at the right side of the window), with selection buttons for each of the A TX’s managed ports. The left side of this window features fields which allow you to select the mirr or type (local[...]

A TX P or t Mirror ing 6-4 The P or t Mirroring Window If the port(s) being mirrored and the diagnostics port are both local 1. In the mirrored por ts selection area, click on the selection button(s) f or each por t that you wish to mirror . 2. In the Mirr or T ype field, clic k on the menu b utton to display the P or t T ype selection menu. Selec[...]

The P or t Mirroring Window 6-5 A TX P or t Mirror ing 5. Using the P or t Filtering window , establish any mirror filters that y ou wish to apply to the mirrored traffic. See Chapter 3, Using A TX P ort Filtering , for details on setting up your mirror filters . 6. Click on Set to apply your por t mirroring configuration. Y our configuration [...]

A TX P or t Mirror ing 6-6 The P or t Mirroring Window[...]

7-1 Chapter 7 IPX Routing T ab les IPX Statistics defined The IPX Routing T ables window displays statistics containing information about IPX Routing on your A TX. The A TX’s ports can be configured to r oute IPX (Internetwork Packet Exchange) packets, see the IPX Routing section in Chapter 2 , for more information. IPX is Novell’s pr oprieta[...]

IPX Routing T ables 7-2 IPX Statistics Figure 7-1. IPX Routing T ables window IPX Statistics The window consists of three separate tables: IPX Interface, IPX Route, and IPX SAP . Each section contains a differ ent table of IPX routing information. IPX Interface This section displays the A TX’s IPX routing attributes on a per interface basis. Each[...]

IPX Statistics 7-3 IPX Routing T ables Framing Displays the link-level framing to be used for this interface: • ethernet 802.3 — the default for ethernet links. This framing will use an 802.3 length followed by the IPX header and data. • ethernet 2 —the same framing as 802.3, except the third field (the length field in 802.3) is used to s[...]

IPX Routing T ables 7-4 IPX Statistics Po r t # Displays the interface index of the port on your A TX through which the next hop of the route should be r eached. Hop Count Displays the secondary routing metric for this r oute, which is the number of routers that must be traversed to r each the destination. Next Hop Displays the IPX node address of [...]

IPX Statistics 7-5 IPX Routing T ables NodeID Displays the IPX node address of the server . When you ar e running Netware 2.x this corresponds with a physical MAC addr ess and is displayed in canonical bit order . If you ar e using Netware 3.x the node addr ess is typically 000000000001. Socket Displays the socket number to which service requests s[...]

IPX Routing T ables 7-6 IPX Statistics[...]

Inde x-1 Index A Admin 2-8 Admin/Link 2-8 Age 7-4 all 5-4 ARP Source Route 2-22 ARP T ranslate 2-21 B Boolean operator 4-4, 4-6 Boot Prom, r evision 2-4 Bridge 2-8 Bridge Configuration 2-17 Bridge Number 2-19 Bridge status mode 2-8 Broadcast Pr otection 2-16 buffer space 2-28 C Cancel button 1-4 Clear button 3-4 color codes 2-9 color-coded port di[...]

Inde x Inde x-2 L Last Change 3-4 Last Error 3-3 Link Count 3-4 Link Ordinal Displays the position 3-4 link-level framing 7-3 Load 2-26 Local 6-4 Local Switching 2-17 Location 1-4 Logical Status 2-24 M MAC address 1-4, 2-3 menu structur e 2-4 MIB components 2-10 MIM type 2-11 Mirror Entry 4-3 Mirror Exit 4-3 Mirror filter 4-3 mirror filters 6-1 M[...]

Inde x-3 Inde x T technical support 1-5 Thresh Number 2-17 Thresh T ime 2-17 T ick Count 7-4 to change the status view of your ports 2-8 T ranslation 2-20 T ranslation button 2-20 T ransmit BPDUs 2-19 T ransmit Queue Size 2-28 T r oubleshooting 2-28 T runcate Oversized Packets 6-4, 6-5 T runking 3-1 trunking table 3-2 type of service 7-4 U Unicast [...]

Inde x Inde x-4[...]