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Re: Running DHCP on VPS, ( on a router.. ) [message #21030 is a reply to message #21025] Mon, 01 October 2007 09:46 Go to previous messageGo to previous message
ml-openvz-eyck is currently offline  ml-openvz-eyck
Messages: 18
Registered: August 2007
Junior Member
Hello Kirill,

> can you please add -e option to tcpdump, so that we could check MAC in packets?
> and tell me plz MAC addresses of HN, veth inside VE and your DHCP client.
 Here's the tcpdump on HN:


11:38:39.651963 00:1b:d5:2c:bf:38 > ff:ff:ff:ff:ff:ff, ethertype IPv4
(0x0800), length 350: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
from 00:1b:d5:2c:bf:38, length 308

11:38:39.669960 00:08:02:ac:36:20 > ff:ff:ff:ff:ff:ff, ethertype IPv4
(0x0800), length 342: 172.17.8.254.67 > 255.255.255.255.68: BOOTP/DHCP,
Reply, length 300

and on VPS it's visible as:

11:38:39.669971 00:08:02:ac:36:20 > ff:ff:ff:ff:ff:ff, ethertype IPv4
(0x0800), length 342: 172.17.8.254.67 > 255.255.255.255.68: BOOTP/DHCP,
Reply, length 300

can't find any sign of this packet in /var/log/messages, it looks like
everything in /var/log/messages is completely unrelated to dhcp, some of
those are vrrp heartbeat, others - SNAP, 

it looks like this:
grep -i 00:08:02:ac:36:20 /var/log/messages

Oct  1 10:48:09 dfw1 kernel:   src = 00:1b:d5:84:90:92:, dst =
00:08:02:ac:36:20:
Oct  1 10:59:42 dfw1 kernel:   src = 00:1b:d5:84:7a:1f:, dst =
00:08:02:ac:36:20:

no sign of similiar packet on 11:38:39, 

-- 
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