Re: DHCP Snooping not working

My mistake. I should have given more details.

Users are connected to 6 3560 access-layer switches. Even tough they are
L3-capable switches, they are running in L2 mode. The switches uplink to a
6500 Series Core Switch.

There is an FWSM Module on the core switch which acts as the DHCP relay
agent for all the user requests. The DHCP servers (Microsoft) are in a
dedicated servers VLAN connected to the core switch.

Regards

Farrukh

On Mon, Jan 18, 2010 at 2:26 PM, Sadiq Yakasai <sadiqtanko_at_gmail.com> wrote:

> Hi Farrukh,
>
> What if you trust the access ports? Does that change the outcome? What
> about moving on to a newer code?
>
> Is the debug above from the access switch? Whats your topology here please?
>
> Sadiq
>
> On Mon, Jan 18, 2010 at 11:22 AM, Farrukh Haroon <farrukhharoon_at_gmail.com>wrote:
>
>> Dear All
>>
>> We are facing a weird issue while trying to configure DHCP snooping.
>> Users are unable to get/renew IP Addresses after enabling DHCP snooping.
>> The DHCP Snooping binding table is always empty.
>>
>> The configuration is pretty simple
>>
>> ip dhcp snooping vlan 101,104
>> no ip dhcp snooping information option
>> ip dhcp snooping
>>
>> All ports connected to DHCP servers and uplinks set as trusted.
>>
>> Switch Version: c3560-ipservices-mz.122-35.SE5
>>
>> I tried the same configuration with another 3560 Switch running an older
>> version with no issues at all.
>>
>> This is the error we see on all the trusted ports, any ideas why this is
>> happenning:
>>
>> Dec 27 08:56:43 KSA: DHCPSNOOP(hlfm_set_if_input): Setting if_input to
>> Gi0/49 fo
>> r pak. Was not set
>> Dec 27 08:56:43 KSA: DHCPSNOOP(hlfm_set_if_input): *Clearing if_input for
>> pak. W
>> as Gi0/49*
>> Dec 27 08:56:43 KSA: DHCPSNOOP(hlfm_set_if_input):* Setting if_input to
>> Gi0/49 fo
>> r pak. Was not set*
>>
>> Regards
>>
>> Farrukh
>>
>>
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Received on Mon Jan 18 2010 - 14:41:24 ART