Hi,

I was wondering if it were possible to load-balance over P-router to PE-router LDP-links.

ISIS is used as IGP for announcing the PE routers' loopback ip addresses used for imBGP.

At first glance I wanted to set up a portchannel but the algoritms use mac/ip while here we are working with labels.

As a result we have most likely no decent loadbalancing because all traffic flows from 1 P-router to a single PE-router so the hashing will always select the same link of the channel.

Later on I started thinking creating a same-cost ISIS route to the PE loopback ip via an additional link between these 2 routers.

I would enable LDP on this additonal link as well.If all would work well we obtain load-balancing for VRF-traffic because

the P-router would have 2 labels for reaching the same PE loopback ip.

But then PHP appears in the picture and hence my question: would this LDP-loadbalancing between penultimate P-rtr and PE-rtr actually work?

The most important direction is from the P-router ro the PE-router.

Thanks in advance,

Dirk