[j-nsp] Conditional advertising of default routes

[radu.pavaloiu at dynamicnetworks.ro]

I think you can use a generated default route with a contrib of uplink
prefix. When the uplink disappears the contrib route do the same and the
generated route disappears.

HTH,

Radu Pavaloiu
CCIE #14582, JNCIS M/T

> I've got a pair of Juniper M7is that handle our internet connectivity.
> At the moment, they are generating default routes via static discard
> configuration, and advertising them into OSPF. Obviously this is less
> than ideal, as if one router's uplink disappears it will continue to
> advertise the default and we'll get blackholed traffic at worst (at
> best, iBGP plugs the gap, but right now that isn't in place).
>
> With Cisco, in a similar situation, you can do a default-information
> originate route-map blah, where route-map blah just matches a network
> you expect always to be available (I use the RIPE F golden network).
> In this way, if a border routers peering drops, it stops advertising
> the default and traffic gets routed correctly internally.
>
> I've been searching through the Juniper documentation, but have been
> unable to figure out how to produce the same effect on them.
>
> Any ideas?
>
> Thanks in advance,
> Ras
>
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/juniper-nsp
>
> ---------------------------------------------------
> This message and its contents have been scanned and certified for
> transmission as being free from malicious code by <<eTrust Antivirus>>.
> This
> message may contain confidential, privileged or other legally protected
> information. It is intended for the addressee(s) only. If you are not the
> addressee, or someone the addressee authorized to receive this message,
> you
> are prohibited from copying, distributing or otherwise using it. Please
> notify the sender and return it.Thank you.
>
>
>
>



---------------------------------------------------
This message and its contents have been scanned and certified for
transmission as being free from malicious code by <<eTrust Antivirus>>. This
message may contain confidential, privileged or other legally protected
information. It is intended for the addressee(s) only. If you are not the
addressee, or someone the addressee authorized to receive this message, you
are prohibited from copying, distributing or otherwise using it. Please
notify the sender and return it.Thank you.