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Old 04-29-2008, 01:12 PM   #1 (permalink)
LeeNetworX
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Join Date: Apr 2008
Posts: 2
OS: XP 64-bit SP2


DHCP Traffic Not Traversing VLANs

Hello all. Sorry for my first post here being a question, but I was just searching Google and stumbled upon this forum.

We have been using our Catalyst 3560 for providing DHCP services to two subnets, both of which are VLANs on the switch. We just switched over to using a Windows DHCP server. The DHCP server is sitting in one of the two VLANs that receives address via DHCP. Hosts in that VLAN are not having any issues getting IPs. The hosts in the other VLAN, however, cannot. We setup an IP-Helper for that VLAN but it doesn't seem to be working.

We tried assigning a host a static IP in that VLAN, and it can ping the DHCP server, so it seems routing is working. SH INT VLAN shows up/up. It also shows " Received 0 broadcasts (0 IP multicast) " which seems to verify that DHCP traffic isn't making it in or out. Tried rebooting the switch.

Does anyone have any ideas? Any help would be most appreicated. Thanks for your time.

Here's the snippet for the VLAN config:

interface Vlan86
description ** iLO **
ip address 10.7.86.1 255.255.255.0
ip helper-address 10.7.80.2
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