[c-nsp] Embeded Packet Capture for DHCP Troubleshooting

Jeff Wojciechowski Jeff.Wojciechowski at midlandpaper.com
Tue Sep 21 12:55:14 EDT 2010


Makes sense - thanks again everyone.

Thanks,

-Jeff


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Phil Mayers
Sent: Tuesday, September 21, 2010 11:16 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Embeded Packet Capture for DHCP Troubleshooting

On 21/09/10 16:23, Jeff Wojciechowski wrote:

> boot up (so before the client has an ip from dhcp - isn't the dhcp
> transaction all arp?)

No. It's UDP packets on ports 67 and 68.

It uses source/dest addresses of 0.0.0.0 and 255.255.255.255, but it's still plain IP packets, so embedded packet capture should work.
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