Hi.
I have two CE-facing interfaces in my L2VPN routing instance. Both CE-facing interfaces are configured under the same site (SITE-A) as follows (I'm using LT interfaces in my setup since I don't have real cables).:
set routing-instances VPN-A protocols l2vpn site SITE-A site-identifier 1
set routing-instances VPN-A protocols l2vpn site SITE-A interface lt-0/0/0.2 remote-site-id 2
set routing-instances VPN-A protocols l2vpn site SITE-A interface lt-0/0/0.4 remote-site-id 3
This leads to a unique incoming (from MPLS core) pseudowire label per CE-facing interface. Connectivity is successful amongst all customer sites.
Now I change my configuration to have my CE-facing interfaces in different sites (SITE-A and SITE-B) but still within the same routing instance.
set routing-instances VPN-A protocols l2vpn site SITE-A site-identifier 1
set routing-instances VPN-A protocols l2vpn site SITE-A interface lt-0/0/0.2 remote-site-id 2
set routing-instances VPN-A protocols l2vpn site SITE-B site-identifier 4
set routing-instances VPN-A protocols l2vpn site SITE-B interface lt-0/0/0.4 remote-site-id 3
This still leads to a unique incoming (from MPLS core) pseudowire label per CE-facing interface. Connectivity amongst all sites of the customer is intact. So the same as in the first scenario.
So my question is.. within a single routing instance, in what condition would I need to keep both my CE-facing interfaces in different sites instead of a single site?
Thanks,
Deepak