[j-nsp] SRX 650 reth interface load balancing

[Stefan Fouant]

> -----Original Message-----
> From: Walaa Abdel razzak [mailto:walaaez at bmc.com.sa]
> Sent: Thursday, March 17, 2011 3:02 AM
> To: Doug Hanks; Stefan Fouant; juniper-nsp at puck.nether.net
> Subject: RE: [j-nsp] SRX 650 reth interface load balancing
> 
> Hi Doug
> 
> So, do you mean that there is no need to use the export policy on the
> forwarding table and the traffic will be load balanced by default using
> LACP? I am using this ECMP policy only for this purpose. as per my
> knowledge Juniper is not load balancing the traffic by default unless
> there is an explicit configured policy.

You absolutely do not need this policy for load-balancing across a LAG or
RETH interface.  This happens automatically through hashing across the
member interfaces within the bundle.

Forwarding-table load-balance export policies only come into play when there
are MULTIPLE next-hops for a given route.  With a LAG or RETH interface,
they all appear to be a single logical interface, therefore there aren't
MULTIPLE next-hops but rather only a single next-hop.  You can safely remove
the export policy with no effect on the RETH interface.

Stefan Fouant, CISSP, JNCIEx2
www.shortestpathfirst.net
GPG Key ID: 0xB4C956EC