[c-nsp] Counters for null0?

John Kougoulos koug at intracom.gr
Wed Aug 5 09:51:34 EDT 2009


I think it will also show Null when it is forwarded but goes through a 
permit ACL with log keyword

John

On Wed, 5 Aug 2009, Rodney Dunn wrote:

> There are scenarios (nat, acl drops, etc.) where the dst in the netflow will 
> show null.
>
> For a transit packet that is forwarded out will not (should not) show Null.
>
> Rodney
>
>
>
> luismi wrote:
>> I just configure a router here to use it but it is quite strange because
>> I can see correct traffic routed to "null", and I didn't expect to see
>> that, I don't think it is correct.
>> 
>> #sho ip cache flow | incl Null
>> Fa0/1.1       10.55.0.32      Null          208.67.222.222  11 0A2A 0035
>> 1 Fa0/1.1       10.55.0.32      Null          208.67.222.222  11 0A26 0035
>> 5 
>> 208.67.222.222 is the opendns server but the destination interface is
>> "null"
>> 
>> Any idea why I see that? is that correct (I don't think so)?
>> 
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>


More information about the cisco-nsp mailing list