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New Member

3750 12.2 release DHCP Issue

I am unable to get an IP address by using a specific switch which has version 12.2 (25) SEB4, Release

I have my DHCP configured on windows server which is residing on different network. This network is a sub interface on firewall and on firewall I?ve defined relay agent and specified the IP address.

Lets say like below:

IP address of firewall interface: 10.40.1.254 VLAN TAG 100

IP address of firewall interface: 10.50.0.254 no VLAN TAG, default to 1

IP Address of DHCP SERVER: 10.50.1.9

I?ve created layer 2 interface for VLAN 100 on switch and when I configure the switch ports to be member of VLAN 100, I am unable to get an IP address, I always get the below:

IP 169.x.x.225

Mask: 255.255.0.0

Gateway: 169.254.164.225

I?ve defined relay on firewall interface with VLAN 100 TAG to IP 10.50.1.9 but I don?t get an IP address at all but when I configure the port to be member of VLAN 1 which is default I am able to get IP address.

There is no Layer 3 address for VLAN 1 on switch, activity between switch and firewall is layer 2

Can anyone help?

1 REPLY
New Member

Re: 3750 12.2 release DHCP Issue

There is something wrong with my DHCP which is also running on a 3750 with the same IOS as yours...

I have posted a question, but as far as I am concerned it is a software bug because if I do erase start, then tftp the config back on it works fine...until a reboot occurs.

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