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Cisco Systems BC-281 manual

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Table of contents for the manual

  • Page 1

    BC-281 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Configuring Data-Link Switching Plus This chapter describes ho w to conf igure data-link sw itching plus (D LSw+), Cisco’ s implementation of the DLSw standard for Systems Network Architect ure (SN A) and NetBIOS de vices. Refer to the DLSw+ Design and Implem entation [...]

  • Page 2

    Configuring Data-Link Switching Plus Technology Overview BC-282 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 DLSw Standard The DLSw standard, documented in RFC 1795 , defi nes the switch-to-switch protocol between DLSw routers. The standard also def ine s a mechanism to terminate data-l ink control connections locally and[...]

  • Page 3

    Configuring Data-L ink Switching Plus Technology Overview BC-283 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 UDP Unicast DLSw V ersion 2 uses UDP unicast in response to an IP multicast. When ad dress resolution packets (CANUREA CH_EX, NETBIOS_NQ _ex, NETBIOS_ANQ, and D A T AFRAME) are sent to mu ltiple destinations (IP [...]

  • Page 4

    Configuring Data-Link Switching Plus Technology Overview BC-284 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 • UDP unicast support • Load balancing • Support for LLC1 circuits • Support for multi ple bridge groups • Support for RIF P assthrough • SN A type of service feature support • Local ackno w ledgment [...]

  • Page 5

    Configuring Data-L ink Switching Plus Technology Overview BC-285 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Figure 127 LLC2 Session without Local Acknowledgment On backbone networks consisting of slo w serial links, the T1 timer on end hosts could e xpire before the frames reach the remote hosts, causi ng the end ho st[...]

  • Page 6

    Configuring Data-Link Switching Plus Technology Overview BC-286 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Enabling local ackn owledgment for LLC2 has t he following adv antages: • Local ackno wledgment for LLC2 solves the T1 ti mer problem without having to change any configuration on the end nodes. The end nodes are[...]

  • Page 7

    Configuring Data-L ink Switching Plus Technology Overview BC-287 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 If you are using NetBIOS applications, note that there are two NetBIOS timers—o ne at the link le vel and one at th e next higher le vel. Lo cal acknowledgme nt for LLC2 is designed to solve link timeouts only [...]

  • Page 8

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-288 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Figure 129 VDLC Interaction with Higher -La yer Prot oc ol s The higher -layer protocols make no distinction betw een the VDLC and any other data-lin k control, but they do identi fy the VDL C as a desti [...]

  • Page 9

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-289 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Defining a DLSw+ Remote Peer Defin ing a remote peer in DLSw+ is optional, ho we ver , usually at least one side of a peer co nnection has a dlsw remote-peer statemen t. If you omit the dlsw remote-peer[...]

  • Page 10

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-290 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 TCP/IP with RIF Passthrough Encapsulation T o configure TCP/ IP with RIF Passthrough encap s ulation, use the follo wing command in global confi guration mode: The follo wing command specif ies a remote p[...]

  • Page 11

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-291 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Direct Encapsulation T o configure direct encapsulation, use the fo llowing command in g lobal configuration mode: Direct encapsulation is suppor ted over High-Lev el D ata Link Control (H DLC) and Fram[...]

  • Page 12

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-292 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Mapping DLSw+ to a Local Data-Link Control In addition to conf iguring local and remote peers, you must map one of the followi ng local data-link controls to DLSw+: • T oken Ring, page 292 • Ethernet,[...]

  • Page 13

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-293 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Ethernet T raff ic that origina tes from Ethe rnet is picked up from the local Ethernet interface bridge group and transported across th e DLSw+ network. Therefore, you must map a specif ic Ethernet bri[...]

  • Page 14

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-294 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Use the default option if you ha ve more than 10 SDLC d evices to attach to the DLSw+ n etwork. T o confi gure an SDLC multidrop line do wnstream, you conf igure the SDLC role as either primary or prim-xi[...]

  • Page 15

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-295 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 • Remote X.25-attached SNA de vices can acce ss an FEP or an AS/400 over a T oken Ring or o ver SDLC. For en vironments ju st beginning to migrate to LANs, our QLLC support allows deployment of LANs i[...]

  • Page 16

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-296 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 • Modes of Operation, page 306 ⎯ Dynamically detects the capabilities of the peer rout er and operates according to those capabili ties. • Network Management , page 307 —W orks with enhanced netw [...]

  • Page 17

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-297 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 The DLSw+ Peer Clusters fe ature is configured l ocally on the member peer or on a border peer . Altho ugh both options can be con figured , we recommend that the cluster -id of a particular peer is def[...]

  • Page 18

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-298 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 T o define peer groups, conf igure border peers and a ssign the local peer to a peer cluster , use the follo wing command in global configuration mode: Use the group k eyword to def ine a peer group, the [...]

  • Page 19

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-299 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 T o configure peer -on-demand defaults, use the fo llowing command in global configuration mode: T o define the maximum entries maint ained in a border peer’ s group cache, use the fol lowing command [...]

  • Page 20

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-300 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 T o display the contents of the reachabili ty caches, use the followi ng command in privile ged EXEC command mode: Use the group k eyword to display th e reachability information for the bord er peer . Ex[...]

  • Page 21

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-301 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 SNA Dial-on-Demand Routing This feature allo w s you to run DLSw+ over a switch ed line and ha ve the Cisco IOS software tak e the switched line do wn dynamically when it is not in use. Uti lizing this [...]

  • Page 22

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-302 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 LLC1 Circuits Support for LLC1 circuits more ef ficiently transp orts LLC1 UI traff ic across a DLSw+ cloud. With LLC1 circuit support, th e LLC1 unnumbered information frames (UI) are n o longer subject [...]

  • Page 23

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-303 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 T o c onfigure promiscuous p eer defaults, use the following command in global configuration mode : Availability DLSw+ suppo rts th e following featur es that allow it to dynamically finds al ternate pa[...]

  • Page 24

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-304 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 For multiple peer connections, peer costs must be applied. The DLSw+ Enhanced Load Balancing feature works only with the lo west (or equal) cost peers. For e xample, if the user specif ies dlswrtr1, dlswr[...]

  • Page 25

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-305 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Ethernet Redundancy The DLSw+ Ethernet Redundanc y feature, introdu ced in Cisco IOS Release 12.0(5)T , provides redundanc y and load balancing betw een multiple DLSw+ peers in an Ethernet en vironment.[...]

  • Page 26

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-306 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Note If the linger ke yword is set to 0, all e xisting sessions on the backup router immediately drop when the primary recove rs. If the linger keyword i s omitted, all existing sessi ons on the backup ro[...]

  • Page 27

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-307 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Network Management There are se v eral network management tools a vailable t o the user to help them more easily manage and troubleshoot their DLSw+ netw ork. CiscoW orks Bl ue Maps provides a logical v[...]

  • Page 28

    Configuring Data-Link Switching Plus DLSw+ Configuration Task List BC-308 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Figure 130 Mapping T raf fic Using Por t Lists The defi nition of a port list is optio nal. If you want all peers and all interf aces to receiv e all traff ic, you do not ha ve to defi ne a port list. Sim[...]

  • Page 29

    Configuring Data-L ink Switching Plus DLSw+ Configuration Task List BC-309 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Static Paths Static path def initions allo w a router to setup circui ts without send ing explorers. The path specif ies the peer to use to access a MAC address or NetBIOS name. T o configure static pat[...]

  • Page 30

    Configuring Data-Link Switching Plus Verifying DLSw+ BC-310 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Configuring DLSw+ Timers T o configure DLSw+ timers, use th e follow ing command in global conf iguration mode: See the DLSw+ Design and Implement ation Guide “Customization” chapter and the Cisco IOS Bridging and [...]

  • Page 31

    Configuring Data-L ink Switching Plus Monitoring and Maintaining th e DLSw+ Network BC-311 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Alternately , to verify that DLSw+ is conf igured, issue the follo wing command in pri vileged EXEC mode: The global DLSw+ configuratio n statements, including the dlsw local-peer s tate[...]

  • Page 32

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-312 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 See the DLSw+ Design and Im plementation Guide “Using Sho w and Debug Commands” chapter and the Cisco IOS Bridging and IBM Networ king Command Refer ence (V olume 1 of 2) for details of the commands. [...]

  • Page 33

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-313 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Figure 131 illu strates a DLSw+ configuration with local ackn owledgment. Because the RIF is terminated, the ring group numbers do not have to be the same. Figure 131 DLSw+ with Local Ac know ledgment—[...]

  • Page 34

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-314 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 DLSw+ Using TCP Encapsulation with Local Acknowledgment—Peer Group Configuration Example 1 Figure 132 illustrates border peers with TCP encapsula tion. Router A is conf ig ured to operate in promiscuous[...]

  • Page 35

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-315 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 ! interface serial 0 ip unnumbered tokenring 0 bandwidth 56 ! interface tokenring 0 ip address 128.207.150.8 255.255.255.0 ring-speed 16 source-bridge 3 14 31 source-bridge spanning ! router igrp 777 net[...]

  • Page 36

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-316 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 DLSw+ Using TCP Encapsulation with Local Acknowledgment—Peer Group Configuration Example 2 Figure 133 illust rates a peer group confi guration that allo ws an y-to-any connection e xcept for Router B. R[...]

  • Page 37

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-317 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 dlsw local-peer peer-id 150.150.98.1 group 2 dlsw remote-peer 0 tcp 150.150.100.1 ! interface loopback 0 ip address 150.150.98.1 255.255.255.192 ! interface serial 1 no ip address encapsulation sdlc no k[...]

  • Page 38

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-318 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 no ip address ring-speed 16 source-bridge 92 1 2000 source-bridge spanning ! .interface tokenring 0/2 no ip address ring-speed 16 source-bridge 93 1 2000 source-bridge spanning ! router eigrp 202 network [...]

  • Page 39

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-319 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 clockrate 19200 sdlc role primary sdlc vmac 4000.1234.5600 sdlc address C1 sdlc xid C1 05DCCCC1 sdlc partner 4001.3745.1088 C1 sdlc address C2 xid-poll sdlc partner 4001.3745.1088 C2 sdlc dlsw C1 C2 In t[...]

  • Page 40

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-320 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Router A source-bridge ring-group 1111 dlsw local-peer peer-id 10.2.2.2 dlsw remote-peer 0 tcp 10.1.1.1 interface loopback 0 ip address 10.2.2.2 255.255.255.0 interface TokenRing 0 no ip address ring-spee[...]

  • Page 41

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-321 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 dlsw bridge-group 5 ! interface loopback 0 ip address 128.207.111.1 255.255.255.0 interface Ethernet 0 no ip address bridge-group 5 ! bridge 5 protocol ieee Router B hostname Router B ! source-bridge tra[...]

  • Page 42

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-322 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 interface fddi 0 no ip address source-bridge 26 1 10 source-bridge spanning Router B source-bridge ring-group 10 dlsw local peer peer-id 132.11.11.3 dlsw remote-peer 0 tcp 132.11.11.2 interface loopback 0[...]

  • Page 43

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-323 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 ! interface loopback 0 ip address 150.150.10.2 255.255.255.0 interface serial 8 ip address 150.150.11.2 255.255.255.192 clockrate 56000 ! interface tokenring 0 no ip address ring-speed 16 source-bridge 5[...]

  • Page 44

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-324 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 source-bridge spanning ! router eigrp 202 network 150.150.0.0 DLSw+ over Frame Relay Configuration Example Frame Relay support e xtends the DLSw+ capabilities to include Frame Relay in direct mode. Frame [...]

  • Page 45

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-325 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 interface serial 0 mtu 3000 no ip address encapsulation frame-relay frame-relay lmi-type ansi frame-relay map dlsw 30 DLSw+ over QLLC Configuration Examples The follo wing three examples describe QLLC su[...]

  • Page 46

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-326 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 Example 3 In this e xample, two dif ferent X.25 resources want to communicate ove r X.25 to the same FEP . In the router attached to the X.25 network, e very X.25 connection request for X. 121 address 311[...]

  • Page 47

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-327 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 DLSw+ with Enhanced Load Balanc ing Configuration Example Figure 140 sho ws DLSw+ w ith the Enha nced Load B alancing feature. Figur e 140 DLSw+ with En hanced Load Balancing Router A is configured for t[...]

  • Page 48

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-328 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 DLSw+ Peer Cluster Feature Configuration Example Figure 141 sho ws a DLSw+ network configured with the DLSw+ Peer Clusters feature. Figure 141 DLSw+ P eer Cluster F eature Because BP2 is configured as the[...]

  • Page 49

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-329 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 DLSW+ RSVP Bandwidth Reservation Feature Configuration Example Figure 142 sho ws a DLSw+ netw ork with the DLSw+ RSVP Bandwidth Reservatio n feature conf igured. Figur e 142 DLSw+ RS VP Bandwidth Reserv [...]

  • Page 50

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-330 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 DLSw+ RSVP Bandwidth Reservation Feat ure with Border Peers Configuration Example Figure 143 sho ws a DLSw+ border peer network co nfigured with DLSw+ RSVP . Figur e 143 DLSw+ RS VP Bandwidth Reservation [...]

  • Page 51

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-331 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 The follo wing output of the show ip rsvp r es command on the DLSWR TR1 verifies that the RSVP reservation w a s successful: DLSWRTR1# show ip rsvp rese To From Pro DPort Sport Next Hop I/F Fi Serv BPS B[...]

  • Page 52

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-332 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02 dlsw remote-peer 0 tcp 10.1.17.1 interface loopback 0 ip address 10.2.24.3 255.255.255.0 int e1 ip address 150.150.2.2 255.255.255.0 dlsw transparent redundancy-enable 9999.9999.9999 master priority 1 dls[...]

  • Page 53

    Configuring Data-L ink Switching Plus DLSw+ Configuration Examples BC-333 Cisco IOS Bridging and IBM Networking Con figu ratio n Guide 78-11737-02 Router A dlsw local peer peer-id 10.2.17.1 dlsw remote-peer 0 tcp 10.3.2.1 dlsw transparent switch-support interface loopback 0 ip address 10.2.17.1 255.255.255.0 int e 0 mac-address 4000.0000.0001 ip ad[...]

  • Page 54

    Configuring Data-Link Switching Plus DLSw+ Configuration Examp les BC-334 Cisco IOS Bridging and IBM Ne tw orking Configuration Guide 78-11737-02[...]