From: Nick Griffin (nick.jon.griffin@gmail.com)
Date: Fri Dec 22 2006 - 00:44:55 ART
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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