From: aekkachai@ait.co.th
Date: Thu Jul 14 2005 - 01:35:47 GMT-3
----- Original Message -----
From: "Thomwin Chen" <thomwin_chen@yahoo.com>
To: "Church, Chuck" <cchurch@netcogov.com>; <gladston@br.ibm.com>;
<ccielab@groupstudy.com>
Sent: Thursday, July 14, 2005 11:23 AM
Subject: RE: Reflexive-access list - DHCP - Helper-address
>I was looking for this link :)
> http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0804.shtml
>
>
> "Church, Chuck" <cchurch@netcogov.com> wrote:
> What you're seeing is correct, if I remember right. A client seeking an
> IP address uses bootpc ports, and the server's response is bootps. I
> may have it backwards, but I know both are involved in a normal
> exchange.
>
>
> Chuck Church
> Lead Design Engineer
> CCIE #8776, MCNE, MCSE
> Netco Government Services - Design & Implementation Team
> 1210 N. Parker Rd.
> Greenville, SC 29609
> Home office: 864-335-9473
> Cell: 703-819-3495
> cchurch@netcogov.com
> PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> gladston@br.ibm.com
> Sent: Wednesday, July 13, 2005 9:39 PM
> To: ccielab@groupstudy.com
> Subject: Reflexive-access list - DHCP - Helper-address
>
> When using access-list with DHCP and IP helper-address, this was the
> needed entry:
>
> permit udp host 100.5.14.1 eq bootps host 100.5.46.4 eq bootps
>
> 100.5.14.1 is the dhcp router (R1).
> 100.5.46.4 (R4) is the router configured with ip helper-address. It is
> also the router with Reflexive access-list on the interface pointing to
> R1.
>
> R1 answers the dhcp request using destination port 67. It seems it
> considers R4 as a dhcp server.
>
> Have you worked with similar configuration?
>
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