[c-nsp] Metro Ethernet nightmares (L2PT, PBB-VPLS, Load Balancing, EVPN)

[Holger L]

On Fri, May 3, 2013 14:41, Holger L wrote:
> Next we wanted to upgrade our core node links from 10Gbps to 20Gbps using
> the unused interfaces on our ES+T-4TG Linecards.
>    R1===R2
>    ||   ||
>    R4===R3
>
> First, I tried to etherchannel them together but faced the problem that
> there is no suitable load balancing hash. It can't be balanced by MAC
> because in PBB you only see core node macs, which would produce bad load
> balancing by 4 different MACs. Neither it can be balanced by MPLS label
> because in PBB all ISIDs are transfered in one bridge-domain, thus in one
> vfi and results in only one label to reach the next-hop, which produces
> very bad load balancing.
>
> Second, I tried to use RSVP for load balancing and created two primary
> MPLS-TE tunnels between every two routers.
> R1 Te2/1----[Tunnel R1-R2-1]----Te2/3 R2
> R1 Te2/2----[Tunnel R1-R2-2]----Te2/4 R2
> ...
> Now I got two equal routes for each next-hop in the routing tables and
> made some tests, well, without success. It seems RSVP load balances by
> MPLS label too (correct me if I am wrong) and as already mentioned
> PBB-VPLS results in just a few lables and produces bad load balancing.

Anyone has an idea how to do load balancing on two links between
PE-Routers in a PBB-VPLS core?

Best regards,
Holger