[j-nsp] Multipath BGP issue

Felix Schueren felix.schueren at hosteurope.de
Thu Jun 2 09:31:01 EDT 2011


Paul,

by default JUNOS will do per-prefix balancing with multipath. Did you 
configure "load-balance per-packet" (which actually is per flow and 
named this for historical reasons) on forwarding table export?

For the load balancing to put multiple paths to the same target into the 
forwarding table, you'll need (besides identical bgp attributes up to 
the obscure tiebreakers):
top
set routing-options forwarding-table export <name-of-policy>

The simplest version of <name-of-policy> is:
top
edit policy-options policy-statement <name-of-policy>
set then load-balance per-packet


 >
 > Is there a legit issue here somewhere?  JTAC seemed to indicate they 
wanted
 > to further investigate my import policy but I don't see anything wrong
 > here.. ?
 >
 >
I think you are just lacking the load-balance per-packet magic towards 
the forwarding engine.

Does this help?

Kind regards,

Felix


-- 
Felix Schüren
Head of Network

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