Re: dhcpdump not seeing dhclient messages
On Mon, Aug 26, 2013 at 2:01 PM, Sean Alexandre <sean@alexan.org> wrote:
> I have a machine that's not acquiring a DHCP lease from my ISP. I can see that
> dhclient is sending DHCPDISCOVER messages. My system log has:
>
> Aug 25 17:36:41 athabasca dhclient: DHCPDISCOVER on eth-wan to 255.255.255.255 port 67 interval 7
-------------8<-------------8<-------------8<-------------8<-------------8<-------------8<-------------8<-------------
> The odd thing is if I do the exact same thing with this machine connected to
> a local TP-LINK router instead of my ISP cable modem, dhcpdump sees the
> DHCPDISCOVER, and the machine acquires a DHCP lease.
Is your cable modem setup in bridge mode? (bridge between it's
ethernet (RJ45) and the 'wan' ports with cable coming in from ISP.
> Any ideas why would dhclient be sending a DHCPDISCOVER, but dhcpdump not see it?
Try tcpdump with dest port 67
HTH
--
Arun Khan
Sent from my non-iphone/non-android device
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