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CCIE Security Exam Certification Guide by Henry Benjamin

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DLSw+ Configuration (0.75 Hours)

Configure DLSw+ on R1, R2, R5, and R6:

  • VLANs 2, 5, and 6 should have DLSw configured to allow SNA devices to communicate between each other.

  • Do not enable DLSw on R9, but allow any future segments connected to R9 reachability to VLAN 2 only.

  • SNA/NetBIOS hosts reside on VLANs 2 and 5.

  • Hosts on VLAN 2 are used only when VLAN 5 is not reachable.

  • Make sure all routers peer to R1 and that only in a network failure will DLSw+ circuits terminate on R2 or R5.

  • DLSw+ peers should only be active when user-based traffic (SNA/NetBIOS) is sent or received.

  • If IP connectivity exists, ensure that DLSw+ remains established.

  • Use a different virtual ring group on each router.

  • Configure a filter that blocks NetBIOS packets with destination ...

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