I am wondering if anyone here has experience with the following situation.
I have 2 VSP switches setup as a vIST cluster. Towards each of these VSPs I have a Juniper router which is running ISIS. The routers are interconnected as well which creates a square. I would like to use the ISIS protocol to send the routes from the Juniper routers towards the VSPs and the other way around. The routing on the Juniper devices is working, They are distributing the routes. The VSPs are doing the same. However, the adjacency between the SRX and the VSP is not coming up. On the VSP end it seems that I can only add SPBM interface towards ISIS and not regular ISIS interface which I believe I need.
When I configure it like that and perform the tagging of my backbone vlans on the Juniper (and ofc put those interfaces in ISIS) there seems to be no communication between them.
Just creating a P2P IP interface also does not work.
Has anyone ran a setup like this? Either Juniper or other routers?
Best answer by Paul A. Leroux
Between VSPs, the IP Shortcuts are using ISIS. But from the Fabric VSPs, they do not create ISIS routing adjacencies to other vendors.
Configuring a redistribution to OSPF or BGP is going to be your only solution.