packet drop without ARP adjacency [Re: [c-nsp] IOS 12.2S Train]

Pekka Savola pekkas at netcore.fi
Wed Oct 5 03:07:09 EDT 2005


Hi,

On Tue, 4 Oct 2005, David Coulson wrote:
>> Normally, the SYN packet should cause an ARP entry to spring into
>> existance, and the second SYN sent by the machine on the other end will
>> then go through to the receiver.
>
> Wow, you're right - I can't believe I never noticed that. I just ran
> some packets across 12.2(29) and the first SYN gets dumped.

Speaking of which, is there a counter or a command to check how many 
packets have been dropped waiting for ARP adjacency to come up ?

Is it 'RP PAS No Adjacency' and 'RP PAS Incomplete Adjacency' in "show 
ip cef switching statistics" ?

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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