DHCPOFFER sent to wrong MAC?

George C. Kaplan gckaplan at ack.berkeley.edu
Sat Aug 19 05:54:07 UTC 2006

On Aug 18, 2006, at 6:01 PM, George C. Kaplan wrote:
> This discussion rings a bell.  I saw some weird broadcast-related
> behavior on FreeBSD 6.0 a few months back.  That was with a dhcp  
> client
> sending unicast renewal packets (normal), that were going on the wire
> with a broadcast Ethernet address.  See the attached tcpdump packet  
> trace.

Hmm.  My attachment didn't make it.  Here it is in-line:

13:20:19.606964 00:02:2d:xx:xx:xx > ff:ff:ff:ff:ff:ff, ethertype IPv4  
(0x0800), length 342: IP (tos 0x10, ttl  15, id 0, offset 0, flags  
length: 328) XXX.XXX.201.44.68 > XXX.XXX.252.130.67: [udp sum ok]  
BOOTP/DHCP, Request from 00:02:2d:xx:xx:xx, length: 300, xid: 
0xa7391b18, flags:
  [none] (0x0000)
           Client IP: XXX.XXX.201.44
           Client Ethernet Address: 00:02:2d:xx:xx:xx

George C. Kaplan                            gckaplan at ack.berkeley.edu
IST - Infrastructure Services               510-643-0496
University of California at Berkeley

More information about the dhcp-users mailing list