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CCIE Routing and Switching Practice Lab

  • Sample Chapter is provided courtesy of Cisco Press.
  • Date: Aug 20, 2004.

Section 6: DLSw+ (4 Points)

  • Configure DLSw+ between VLAN2 and VLAN4; use routers R8 and R5. Peer from Lo0 on R8 and the VLAN4 interface on R5; ensure that R8 can accept DLSw+ connections from only unknown TCP peers.

Peer as requested from Lo0 on R8 and configure this peer as promiscuous with TCP for the future connections. Configure R5 as requested and configure your bridging parameters to ensure the required connectivity. You should be concerned about this question; it is too easy and this should be ringing alarm bells. If you have configured this correctly as in Example 1-53 and Example 1-54, you have scored 2 points.

Example 1-53 R5 Iinitial DLSw+ Configuration and show output

dlsw local-peer peer-id 10.50.50.1
dlsw remote-peer 0 tcp 10.8.8.8
dlsw bridge-group 1
!
interface FastEthernet0/0
bridge-group 1
!
bridge 1 protocol ieee

R5#sh dlsw peer
Peers:                state     pkts_rx   pkts_tx  type  drops ckts TCP   uptime
 TCP 10.8.8.8        CONNECT      11914     11344  conf      0    0   0    3d22h
Total number of connected peers: 1
Total number of connections:     1

Example 1-54 R8 DLSw+ Connectivity and show output

dlsw local-peer peer-id 10.8.8.8 promiscuous
dlsw bridge-group 1
!
interface FastEthernet0/0
bridge-group 1
!
bridge 1 protocol ieee

R8#sh dlsw peer
Peers:                state     pkts_rx   pkts_tx  type  drops ckts TCP   uptime
 TCP 10.50.50.1      CONNECT      11346     11916  prom      0    0   0    3d23h
Total number of connected peers: 1
Total number of connections:     1

  • Set up a one-line filter, which only allows common SNA traffic to egress from R5 VLAN4 into the DLSw+ network.

You are required to configure lsap-output-list, which allows only the SNA common traffic listed under access-list 200 to egress the DLSw+ connection to R8 on R5. If you have configured this correctly as in Example 1-55, you have scored 2 points.

Example 1-55 R5 LSAP Filter Configuration

dlsw remote-peer 0 tcp 10.8.8.8 lsap-output-list 200
!
access-list 200 permit 0x0000 0x0D0D

36. Section 7: IOS and IP Features (10 Points) | Next Section Previous Section

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