DHCP OFFER issues (to relay client)
Gideon Viator
ktcisg at kaplantel.net
Mon Jun 25 16:19:27 UTC 2007
Tim,
What device is relaying the DHCP requests?
Gideon Viator
IT Administrator
Kaplan Telecommunications
337-643-7171
-----Original Message-----
From: dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org] On Behalf
Of Tim Preston
Sent: Monday, June 25, 2007 10:58 AM
To: dhcp-users at isc.org
Subject: DHCP OFFER issues (to relay client)
Hi there - I'm new to the list so I hope I'm using it right ; ) - sorry for
the length!
I'm trying to get DHCPd version 3.0 hand out IPs to hosts through a relay
client. Other DHCP servers (Windows, Cisco, HaneWin) have no problem doing
this with the exact same network config, so I figure I must be doing
something wrong with ISC DHCPd.
My config is simple:
------------192.168.1.x/24------------
| |
DHCPd DHCP relay agent
(192.168.1.205) (192.168.1.100 eth0)
( 3.11.1.254 eth1)
|
-------------3.11.1.x/24---------------
|
DHCP client
Everything can ping everything else with the DHCP client configured staticly
with a 3.11.1.x/24 address.
dhcpd.conf is even simpler:
----------------------------------------------------------------------------
---------------------------
subnet 192.168.1.0 netmask 255.255.255.0 {
}
subnet 3.11.1.0 netmask 255.255.255.0 {
option routers 3.11.1.254;
option subnet-mask 255.255.255.0;
range 3.11.1.1 3.11.1.9;
}
----------------------------------------------------------------------------
---------------------------
At the Linux box, the DHCP DISCOVER is being received:
Jun 25 10:42:34 dualboot dhcpd: DHCPDISCOVER from 00:90:c8:61:1c:1e
(eum61-1c-1e) via 3.11.1.254
...and subsequently answered with a DHCP OFFER (so it says):
Jun 25 10:42:34 dualboot dhcpd: DHCPOFFER on 3.11.1.9 to 00:90:c8:61:1c:1e
(eum61-1c-1e) via 3.11.1.254
However, a packet capture on the Linux switch port shows no sign of the
offers DHCPd says it's sending out; only 'discovers':
No. Time Source Destination Protocol
Info
1 4.688431 3.11.1.254 192.168.1.205 DHCP
DHCP Discover
2 4.823431 3.11.1.254 192.168.1.205 DHCP
DHCP Discover
3 4.993382 3.11.1.254 192.168.1.205 DHCP
DHCP Discover
Has anyone run across this before??
Thanks,
Tim
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