[c-nsp] How to tell what routes are not in CEF and follow DEFAULT path?

Jeffrey G. Fitzwater jfitz at Princeton.EDU
Tue Jul 2 17:00:31 EDT 2013

I have pointing to one of our ISP so that any prefix < /24 ( which we don't permit in from any ISP) would get pushed to that ISP which might have route.

I am just trying to figure out how may are being pushed to default.

Jeff F.
On Jul 2, 2013, at 4:53 PM, Saku Ytti <saku at ytti.fi>

> On (2013-07-02 20:19 +0000), Jeffrey G. Fitzwater wrote:
>> I would like to find out what routes are NOT in my route table and therefore follow the DEFAULT path to
>> Would  "show ip cef unresolved" work ?  I get nothing back when I run it but maybe there is nothing to see.
> What you imagine is FIB covering all possibilities and then next-hop or
> null, it would not scale and makes no sense. is branch when there
> is no matching top-level branch.
> You could produce such data offline and aggregate it to maximally.
> -- 
>  ++ytti
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