[145190] in North American Network Operators' Group
Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header
daemon@ATHENA.MIT.EDU (Christopher Morrow)
Fri Sep 30 12:31:58 2011
In-Reply-To: <4E85DF11.1030905@foobar.org>
Date: Fri, 30 Sep 2011 12:30:16 -0400
From: Christopher Morrow <morrowc.lists@gmail.com>
To: Nick Hilliard <nick@foobar.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Sep 30, 2011 at 11:24 AM, Nick Hilliard <nick@foobar.org> wrote:
> On 30/09/2011 15:45, Christopher Morrow wrote:
>> traceroute could certainly be handled in the fastpath.
>
> which traceroute? =A0icmp? =A0udp? =A0tcp? =A0Traceroute is not a single =
protocol.
>
traceroute is really an example of 'packet expired, send
unreachable'... that, today is basically:
o grab 64bytes of header (or something similar)
o shove that in a payload
o use the src as the dst
o stick my src on
o set icmp
o crc and fire
there's not really any need to do this in the slow path, is there?
-chris
