From: Church, Chuck (cchurch@netcogov.com)
Date: Thu Jun 08 2006 - 10:53:59 ART
Packets with an expired TTL are always punted to the processor, so it
can send the correct ICMP message (TTL expired) back to the sending
host. It's certainly going to be slower than CEF/Fast/whatever
switching it.
Chuck Church
Network Engineer
CCIE #8776, MCNE, MCSE
Netco Government Services
Enterprise Network Engineering
Home Office - 864-335-9473
Cell - 864-266-3978
cchurch@netcogov.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Richard Dumoulin
Sent: Thursday, June 08, 2006 8:10 AM
To: 'Chris Broadway'; Richard Dumoulin
Cc: Cisco certification
Subject: RE : RE : RE : Traceroute
I just found on Google a doc that says that some routers would take some
packets down a slow path (Software) versus the fast path (CEF, hardwared
etc...)
http://www.icir.org/vern/papers/fsd-pam-02.pdf
<http://www.icir.org/vern/papers/fsd-pam-02.pdf>
-- Richard
-----Message d'origine-----
De : Chris Broadway [mailto:midatlanticnet@gmail.com]
Envoyi : Thursday, June 08, 2006 2:06 PM
@ : Richard Dumoulin
Cc : Cisco certification
Objet : Re: RE : RE : Traceroute
From my ISP NOC experience years ago, I have seen this often and
customers
question it. All the ISP has to do to verify they are good, is a router
to
router ping. An ISP backbone SLA is only ever hop to hop and will not
consider times for multiple hops. They are probably having to 007 some
path
due to federal regulations. You also had a good point, not being a
customer
of theirs would not even get you in the door.
-Chris
On 6/8/06, Richard Dumoulin <Richard.Dumoulin@vanco.fr
<mailto:Richard.Dumoulin@vanco.fr> > wrote:
But there is no problem at all. I just wanted to see the delay by hop
and
noticed this. Even if I had an issue, I am not a customer of the transit
ISP
so not sure I would get help
-- Richard
-----Message d'origine-----
De : Chris Broadway [mailto: <mailto:midatlanticnet@gmail.com>
midatlanticnet@gmail.com]
Envoyi : Thursday, June 08, 2006 1:57 PM
@ : Richard Dumoulin
Cc : Cisco certification
Objet : Re: RE : Traceroute
I am thinking it could be a possible "route back" issue. I do think
there
is enough there to contact the provider (if you are a customer) and have
them look at it from there point of view. Hard to say at this point.
-Chris
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