From: Christopher M. Heffner (cheffner@xxxxxxxxxxxxxxxxxx)
Date: Mon May 13 2002 - 17:51:20 GMT-3
Chuck,
You would think since the mac addresses are on two different segments i
t would not be a problem but it is.
I ran into the same problem last month with the cable modem and Cisco 2651 rout
er. Had to assign the pcs mac address
to the fa0/0 interface that was connected to the cable modem. I thought the sa
me thing as you did ... same mac adddress
but two different segments.
The problem is in the arp cache though. Same mac address to two differ
ent ip addresses on the same router in the same
arp cache. Nasty things happen then.
Just thought you like to know.
===============================================================================
===
Christopher M. Heffner
Strategic Network Solutions, Inc.
Cisco IMCR Course Director
CCIE, CCSI, MCT, MCSE, MCNI, MCNE, CLI, PCLP, FCSE, ASE, CTT, A+
cheffner@certified-labs.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Church, Chuck
Sent: Monday, May 13, 2002 2:58 PM
To: 'Jeff Duchin'; 'Ccielab'
Subject: RE: How to Configure a Cisco Router Behind a Non-Cisco Cable
Mode m
Jeff,
Some cable providers require you to register your MAC address with
them. Try changing the MAC address of the Cisco int to match your PC's.
The duplication shouldn't matter, since they're different physical segments.
You're using 'ip address dhcp' on your interface, right?
Chuck Church
Sr. Network Engineer
CCIE #8776, MCNE, MCSE
US Tennis Association
70 W. Red Oak Lane
White Plains, NY 10604
914-696-7199
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Jeff Duchin
Sent: Monday, May 13, 2002 1:56 PM
To: Ccielab
Subject: How to Configure a Cisco Router Behind a Non-Cisco Cable Modem
Anyone experienced with this?
I've tried this with my 2611 sitting behind my 3Com cable modem, but my
router won't get an IP address for the lofe of it.
Thanks,
Jeff
Jeff Duchin
Design Engineer
WAM!NET Atlantic Region
13600 EDS Drive, 5N-A47
Herndon, VA 20171
Office: (703) 736-4083
Mobile: (301) 305-0122
Fax: (703) 904-4012
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