[nsp-sec] Juniper uRPF to Blackhole

Sebastian Abt sa at rh-tec.de
Fri Mar 21 13:16:26 EDT 2008


* JR Mayberry wrote:
> Isn't anyone actually using the feature and can speak to whether it
> works like Cisco or not?

In uRPF loose-mode Juniper only checks whether an entry for the given
prefix exists in the RIB; if that's the case, the packet is accepted -
even if the next-hop for the prefix is discard.  At least that's what I
remember when I tried to configure this some time ago..

So, yes, I guess your colleagues are right and this behaviour differs
from Cisco's - unfortunately.


regards,
sebastian

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