[c-nsp] IOS XR and IS-IS default origination

[John Neiberger]

Ah, Nevermind. I found it. You configure a route policy that matches on "if
rib-has-route" and you specify the next-hop you're looking for. In my case,
that will work just fine.


On Wed, Jan 9, 2013 at 3:25 PM, John Neiberger <jneiberger at gmail.com> wrote:

> I've noticed that in IOS XR, if you have default-information originate
> configured in ISIS, it will behave similar to "default-information
> originate always" in OSPF. It will advertise a default whether or not it
> has learned one from an external source. I thought this was a bug, but now
> I'm starting to wonder if this is expected behavior.
>
> I also see that a route policy could be added to conditionally advertise a
> default. If ISIS in XR always originates a default when that command is
> configured, what would a route policy look like that would only allow a
> default to be advertised if it was learned via eBGP? I'd swear I've done
> something similar in IOS before, but it's been a while.
>
> Any thoughts?
>
> Thanks,
> John
>