I have the following setup:

Client --> eth2( - router / - eth1( --> dhcp-server(

If the client starts a dhcp-request it receives the dhcp-relay and the dhcp-relay forwards this request to the dhcp-server:

IP > BOOTP/DHCP, Request from << MAC >> (oui Unknown), length 340

The dhcp-server receives this request and sends a reply to the routers interface on client side:

IP > BOOTP/DHCP, Request from b8:27:eb:61:ef:c1 (oui Unknown), length 340
IP > BOOTP/DHCP, Reply, length 300

But this reply is never reaching the client who started the request. For testing all firewalls are disabled, so that there are no packages dropped...


Should the subnet mask be /8 as /16 that would make and be on different ranges?

/8  = 
/16 =
| improve this answer | |
  • No, the subnet mask is right. If I would use /8 as subnet mask the network would go from to and the clients wold be in the same subnet. That's no possible... – JonesK Jan 18 '17 at 9:08

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