[j-nsp] Load Balancing IPv6 Traffic Flows

[Stefan Fouant]

Hi folks,

Has anyone on the list experienced any issues when attempting to
load-balance IPv6 traffic flows?

Whenever I attempt to commit my configuration to load-balance traffic
flows, whether I am using a route-filter or a prefix-list-filter to
match on IPv6 routes, as in the following:

routing-options {
    forwarding-table {
        export load-balance;
    }
}
policy-options {
    policy-statement load-balance {
        term prefixes {
            from {
                route-filter 2001:xxx:dead:beef::/48 orlonger;
                prefix-list-filter v4_routes orlonger;
            }
            then {
                load-balance per-packet;
            }
        }
    }
}

or

routing-options {
    forwarding-table {
        export load-balance;
    }
}
policy-options {
    policy-statement load-balance {
        term prefixes {
            from {
                prefix-list-filter v4_routes orlonger;
                prefix-list-filter v6_routes orlonger;
            }
            then {
                load-balance per-packet;
            }
        }
    }
}

I get the following error:

{master}[edit]
sfouant at rtrxxxx-re1# commit synchronize
re1:
error: Check-out failed for Routing protocols process (/usr/sbin/rpd)
without details
error: configuration check-out failed

According to PR 237457, this error message is generated when more than
one prefix-list statement is included at the [edit policy-options
policy-statement statement-name term term-name from] hierarchy level
and one of the prefix lists is empty.  I have verified however that
all of my prefix-lists are indeed *not empty* and in fact, as I
mentioned previously, I am seeing this problem exhibit itself using
route-filters as well.  Apparently this problem was fixed in JUNOS
8.4... I am running JUNOS 8.2R4.5.

I'm wondering if anyone else has seen any similar problems and are
there any gotchya's when configuring load-balancing for IPv6 traffic.

Thanks for your help!

Stefan Fouant
Principal Network Engineer
NeuStar, Inc. - http://www.neustar.biz