Hi Kris, Link aggregation is generally a good idea with RSVP. It's easier to pack LSPs into one big chunk of bandwidth than to pack into multiples of smaller bandwidths.
You'll need to turn on aggressive pre-emption as this enables the transit LSR to signal ingress LSRs to move LSPs off a link when the available bandwidth reduces i.e. in case of a link failure. Also beware of bundling links that have a large difference in RTD. Jitter shouldn't be a problem as hashing is per flow or per IP but you loose the ability of favouring lower latency links via IGP metric when there is bandwidth available in the network. Depending on your topology you might run into some problems with hashing but this can be solved with indexed next-hop (hash on permuted list of the different levels of ECMP rather than hashing at each level). Cheers! Danny On Thu, May 6, 2010 at 4:09 AM, Kris Price <juniper-...@punk.co.nz> wrote: > Hi all, > > The subject is using link aggregation with RSVP. Or just generally the > subject of how best to handle multiple parallel links between adjacent > routers in a MPLS network. I'm hoping the list can provide guidance on the > best practise for this, or point me to useful material. > > The context is outside of a data centre, in the core of a national carrier > network (P/P and P/PE links). > > Link aggregation is the simplest option, but I am weary there may be > problems with this approach. E.g. with the hashing algorithms and how this > might impact on reported versus actual bandwidth for constrained LSP set up. > Or with fast reroute, or failover from primary to secondary LSPs, when one > of the links in the bundle fails. > > Thoughts, insights, experiences, pointers, appreciated. > > Cheers > Kris > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp