[j-nsp] load balancing between juniper routers for unequal cost path

[Chris Kawchuk]

Build 2 MPLS LSPs to the destination router, turn on OSPF on those
shortcuts, and use ECMP. JunOS will see them as 2 completely identical
paths to the end-device, and load-balance across them.

Enable ECMP load balancing:

routing-options {
    forwarding-table {
        export load-balancing-policy;
    }
}

policy-options {
    policy-statement load-balancing-policy {
        then {
            load-balance per-packet;
        }
    }

Note that "load-balancing per-packet" is a misnomer, and a holdover back
to the Internet Processor #1 on the original M40/M20. We actually do
per-flow load balancing when this is enabled; so as not to upset the
path/timings/order of things like VoIP RTP packets.

- Chris.
 
____________________________________
Chris Kawchuk (ckawchuk at juniper.net)
Systems Engineering, Service Providers
Juniper Networks Inc., Canada
local:     +1 (403) 470-8174
toll-free: +1 (866) 470-8174


-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Hamid Ahmed
Sent: Wednesday, November 07, 2007 9:25 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] load balancing between juniper routers for unequal cost
path

Hi Everyone,

CAn anyone suggest me how to load balancing between juniper routers for
unequal cost paths.

BR//
HA

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