DLSW+ And Other Bridge Protocols

[jdanrich]

I remember reading something on CCO that said that DLSW+ could be used for bridging other protocols via DLSW suchs a DEC LAT / MOP etc.

The example would be to have a E0 on localrouter configured with Bridge Group 1 with Protcol ieee and assigned the DLSW bridge group to the DLSW peer environment. A remote router would have the same pointing to this local router.

This would allow the use of DLSW for transporting non-SNA traffic such as DEC LAT without having to bridge across the WAN.

Is this possible and supported?

[dixho · Accepted solution]

The rule is that DLSw bridge all traffic whose routing protocol is not enable on the router. As DEC LAT is not routable, DLSw definitely bridge it.

As a kind reminder, you need to fully test this. As DEC LAT/MOP uses multicast a lot, DLSw cannot cache it. DLSw uses process switch to copy LAT/MOP multicast traffic to all DLSw peers. If there is too much LAT/MOP multicast traffice, this may cause high CPU on the router.

[jdanrich]

When doing this, is this controlled by an access-list based on Ethernet Type codes?

Also, is there a guage that would be able to tell me how much of a CPU hit this would take?