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 ...