From: dampened (cheechew@hotmail.com)
Date: Fri Dec 22 2006 - 01:04:57 ART
Nick, Jian Gu,
Now I see it. I didn't aware the option82 is default turn on.
I will try to disable it on switch-2 and recheck.
----- Original Message -----
From: Nick Griffin
To: dampened
Cc: Cisco certification
Sent: Friday, December 22, 2006 11:44 AM
Subject: Re: dhcp snoop
Chee chew, try entering the command "no ip dhcp snooping information option"
on the switches. Let me know if this works for you.
On 12/21/06, dampened <cheechew@hotmail.com> wrote:
I have topology where there are 2 switches, upstream and downstream. The
DHCP server is on vlan 2 and client on vlan 3. Both switch are connected
by
trunk.
Here is the skeleton of the config.
When ip put "ip dhcp snooping vlan 3" on switch 2, the client could not
get
IP from DHCP. When I removed it, everything is fine, the binding is
properly
built on switch 1. But without the snooping on switch 2, the feature
actually is not yet configured. Whats wrong with my config?
switch-1:
ip dhcp snooping
ip dhcp snooping vlan 3
interface f0/1
description connect to DHCP server
switchport access vlan 2
switchport mode access
ip dhcp snooping trust
interface f0/24
description trunk to switch 2
interface vlan 2
ip address ...
interface vlan 3
ip address ...
ip helper-address dhcp_server
switch-2:
ip dhcp snooping
ip dhcp snooping vlan 3 <-----------------------------
interface f0/1
description connect to DHCP client
switchport access vlan 3
switchport mode access
interface f0/24
description trunk to switch 1
ip dhcp snooping trust
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