[Users] Putting DHCP server on VENET-connected node

[Vitaliy Gusev]

Hi! 
On 30 January 2009 12:29:29 Dariush Pietrzak wrote:
> Hi,
>  the problem with DHCP and venet, is that dhcp packets are adressed to
> 255.255.255.255, and you can't route packets destined for 255.255.255.255
> with routing tables.
>  But, you sure can direct them towards venet-connected node using other means, 
> here's the one:

I wonder. Why don't you use veth interface for this purpose?

> 
> host: # iptables -t mangle -A PREROUTING -d 255.255.255.255 -j ROUTE --gw 192.168.190.250
> 
> host: # iptables -nvL -t mangle:
> 12394 4069K ROUTE      0    --  *      *       0.0.0.0/0            255.255.255.255     ROUTE gw:192.168.190.250
> 
> then inside vz guest:
> 
> 
> tcpdump -n -i venet0:0
> 
> 02:31:34.337137 IP 192.168.190.138.68 > 192.168.190.250.67: BOOTP/DHCP, Request from 00:a1:3d:1d:b9:a5, length 548
> 
> 08:31:35.188004 IP 192.168.190.138.68 > 192.168.190.250.67: BOOTP/DHCP, Request from 00:a1:3b:1d:b9:a5, length 548
> 08:31:35.188040 IP 192.168.190.250 > 192.168.190.138: ICMP 192.168.190.250 udp port 67 unreachable, length 556

Was a dhcpd server run in VE (on 192.168.190.250) ? What say netstat?

> 
>  the other would be using dhcp-relay on the HN
> 



-- 
Thank,
Vitaliy Gusev