Cisco uRPF failures

Christopher Morrow christopher.morrow at
Sat Sep 6 14:13:06 CDT 2008

On 9/6/08, Anton Kapela <tkapela at> wrote:
> On Thu, Sep 4, 2008 at 11:35 AM, Jo Rhett <jrhett at> wrote:
>  > found a network operator using uRPF on Cisco gear.
>  >  (note: network operator. it's probably fine for several-hundred-meg
>  > enterprise sites)
> Forgive me, but what does bits/sec have to do with anything?

it's possible that on some platforms the uRPF check happens on the
main processor, or on a linecard processor. So, bps rates (proxied for
by pps rates) matter greatly, on those platforms.


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