ISIS SCENARIO QUESTION

[eduardomora473]

I have the following scenario:

Lets suppose the switch is an ISP that provides a VPLS service to connect the 3 routers so they can established an ISIS neighbor relationship. I want to make sure that the traffic from one PE to another PE goes first to the P device and then to the another PE. What options i have to achieve this? and what solution do you think it is easier?

Both PE are BGP neighbors of the RR so when the traffic goes using the P device it is switched using MPLS.

I think one option is to avoid that both PE establish the ISIS neighbor relationship between them but i am not sure how to configure it.

The solution should be as simple as possible.

[Giuseppe Larosa]

Hello @eduardomora473 ,

a possible solution is to use different VLAN based subinterfaces

VLAN X between PE-MCY and P node

VLAN Y between PE-VAL and P node

P node needs two vlan based subinterfaces one for VLAN X and one for VLAN Y

In this way over an any to any VPLS L2 service you can change the logical topology so that the P node is in the middle

Hope to help

Giuseppe

[MHM Cisco World]

what you meaning VPLS in middle ?
VPLS is virtual SW that build from MPLS there is no physical SW.