[j-nsp] uRPF and 0.0.0.0/0

Clue Store cluestore at gmail.com
Tue Aug 25 10:51:36 EDT 2009


Hi All,

Trying to get uRPF working in strict mode and seems to be working fine
(other than the fact i'm just accepting all traffic via my fail-filter). As
I was searching the archives, I found this thread which still doesn't make
it clear about a default route.

http://markmail.org/message/cx5jq6tb7u74isqt?q=thread:ubb3a5ahvzg6hyix

 or here

http://www.juniper.net/techpubs/software/junos/junos61/swconfig61-interfaces/html/interfaces-family-config21.html#1066802

So im still a little unclear if my config is sane in the fact that I do not
have a default route pointing to any interface, but I do have a
0.0.0.0/0discard as shown below. This is to inject a default inwards
for OSPF, but
does not specify an interface. Does this config hose up uRPF (either loose
or strict)??  I'm hoping Harry will catch this to clarify :)

routing-options {
    static {
        route 0.0.0.0/0 {
            discard;
            retain;
            readvertise;
            metric 100;

Thanks,
Clue


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