DHCP Snooping and Port Channelng

Unanswered Question
Apr 14th, 2008

I have an 3560 running 12.2(40)SE IOS. This switch has two trunks in an etherchannel, connecting to a 6509 running 12.2(18)SXF12. Would I apply the *ip dhcp snooping trust* command on both uplinks that make up the EtherChannel?

I have this problem too.
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Edison Ortiz Mon, 04/14/2008 - 09:58

Yes, you need to have trust enabled on switchports facing the DHCP server and to other switches.

HTH,

__

Edison.

Istvan_Rabai Mon, 04/14/2008 - 10:05

Hi Mike,

You need to apply the "ip dhcp snooping trust" command on the port-channel interface, not on the trunks separately.

Cheers:

Istvan

Edison Ortiz Mon, 04/14/2008 - 10:08

On Layer2 etherchanneling, I always recommend mirroring the physical interface configuration with the logical interface configuration.

Actually, that's the way it works when you configure the etherchannel in the first place.

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