From: Filyurin, Yan (yan.filyurin@eds.com)
Date: Fri Feb 16 2007 - 19:59:59 ART
Let me go through archives. You are talking about the switch command?
________________________________
From: Jian Gu [mailto:guxiaojian@gmail.com]
Sent: Friday, February 16, 2007 6:00 PM
To: Filyurin, Yan
Cc: ccielab@groupstudy.com
Subject: Re: DHCP snooping setup
This was asked before, there is a interface command which will
allow DHCP packets with option 82 to go through in stead of drop them.
On 2/16/07, Filyurin, Yan <yan.filyurin@eds.com> wrote:
Hello list. I was recently playing around with DHCP
snooping configuration
and they way I had it set up was that I had router A and
B connected to a
switch being on the same vlan where A was getting its IP
address from B
through DHCP. So I decided to play with DHCP snooping
and enabled it for that
particular vlan. Suddenly DHCP stopped working. After
doing a couple of
debugs, I could see that A was originating the request
and B was seeing it and
giving an error, and the only way I could resolve it is
by doing:
no ip dhcp snooping information option
And ip dhcp snooping trust
After reading RFC that kind of makes sense and of course
the second makes
sense on the router port. The question is. If I had
router C (somewhere
behind router B) set up as a DHCP server and router B
would just be a relay
with the helper-address command, would I still need to
do this tweak because
it appeared that router B was getting confused by the
switch setting option
82.
Thank you
Yan Filyurin
EDS - Bank of America, Network Design
MS: MA6-536-0501
1025 Main Street
Waltham, MA 02451
Office: +1-781-788-2207
Cell: +1-617-875-4862
yan.filyurin@eds.com
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