I am looking for some help with DHCP Relay on a SGE2000 switch.
I have configured two VLANs on the switch, VLAN2 (192.168.10.x/24) and VLAN3 (192.168.9.x/24). I have the switch in Layer 3 mode. I have configured the DHCP relay server of 192.168.10.4 and the DHCP Interfaces as VLAN3. All of the IP Static Routes were generated by the switch.
If I put a client computer on a port that is Untagged VLAN 3 and try to get a DHCP address from the server on an Untagged VLAN 2 port I never get a response back.
I have done some packet captures and here is what I have found:
I see the DHCP broadcast on the client computer
I see the DHCP Request on the DHCP server coming from the IP assiged to the switch on VLAN 3 (192.168.9.254)
I see the DHCP server respond with a DHCP Offer
The DHCP offer never gets to the client computer
I can't seem to get a DHCP address to any system not on the same VLAN as the DHCP server. Option 82 is disable and I did try enabling it, which made no difference.
Thanks for the response. After reading your post I tried to ping the switch on the 192.168.9.0/24 network and could not get there. Once I switched my default gateway on my DHCP server to the switch IP on the same VLAN everything worked. I can now get DHCP address on VLAN 3.
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