Remove the unspecified gateway from linux routing table

Rudy Zijlstra rudy at grumpydevil.homelinux.org
Tue Feb 17 14:15:32 UTC 2015


Hi Eugene,

On 17-02-15 14:42, Eugène Ngontang wrote:
> Hi,
>
> Yes I guess there is a dhcp relay (10.10.10.18 in the below logs) :
seems so, yes, but...
>
> Feb 16 12:44:45 AE-DXB-EWS2 dhcpd: DHCPREQUEST for 10.10.10.21 from 
> 00:01:80:81:39:3a via 10.10.10.18
> Feb 16 12:44:45 AE-DXB-EWS2 dhcpd: DHCPACK on 10.10.10.21 to 
> 00:01:80:81:39:3a via 10.10.10.18
> Feb 16 13:11:23 AE-DXB-EWS2 dhcpd: DHCPREQUEST for *10.10.10.22* from 
> 00:01:80:81:39:7b via 10.10.10.18
> Feb 16 13:11:23 AE-DXB-EWS2 dhcpd: DHCPACK on 10.10.10.22 to 
> 00:01:80:81:39:7b via 10.10.10.18
>
from earlier email:

 > The default gateway I should use is  10.10.10.17, and should be given 
by a linux dhcp server. So to be able to connect to the system I call 
someone on the site ask him to add the route manually (**route add 
default gw 10.10.10.17**).

So this makes me wonder about the network setup, as a dhcp relay 
typically runs on a gateway. Not strictly needed (as it uses a routed 
protocol to talk with the dhcp server), but common usage.

Is there a log on the dhcp relay as well, and does it indicate a delay?

What is the timing on the dhcp as seen by the problem device? Does it 
receive the dhcp-offer on short notice?
Would it be possible to make a network snif?


Cheers


Rudy
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