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DHCP Snooping and Port Channelng

Mike Mott
Level 1
Level 1

‎04-14-2008 09:53 AM - edited ‎03-05-2019 10:22 PM

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?

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4 Replies 4

Edison Ortiz
Hall of Fame
Hall of Fame

‎04-14-2008 09:58 AM

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

HTH,

__

Edison.

0 Helpful

Istvan_Rabai
Level 7
Level 7

‎04-14-2008 10:05 AM

Hi Mike,

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

Cheers:

Istvan

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Edison Ortiz
Hall of Fame
Hall of Fame
In response to Istvan_Rabai

‎04-14-2008 10:08 AM

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.

Istvan_Rabai
Level 7
Level 7
In response to Edison Ortiz

‎04-14-2008 10:43 AM

You're right Edison,

Thanks:

Istvan

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