[j-nsp] ECMP vs LAG and OAM vs BFD

[Rafael Rodriguez]

Hello list,

I'm looking at options on how to do all of the following:
1) Increase bandwidth capacity by adding multiple links with 'flow' based
hashing
2) Sub-second detection mechanism of a indirect link failure that is
distributed to hardware (i.e. PFE handles)
3) Above two must work with NSR and GRES + GR (NSR and GRES + GR and
mutually exclusive, will only use one of the two)

So far here are the possible combinations I've come across (not sure if
these are NSR and GRES + GR friendly):
1) LAG + BFD (this doesn't sound like a good idea b/c you have
no grantee that hashing on each side will use the same link for BFD packets)
2) LAG + OAM (presume OAM will be for each physical interface and not entire
the LAG)
3) ECMP + BFD
4) ECMP + OAM

This setup is to run between MX960s w/ 10GE interfaces on MPC2s on Junos
10.4.

Any pros/cons to going with either of these options?  Any help is
greatly appreciated, thanks!