Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

DHCP Snooping

Hi, I have server farm and user farm having 5 layer-2 switches each farm.Connectivity between both farms are L3. I have DHCP server in Server farm. I want to enable DHCP Snooping. I have made all ports as Untrusted in User farm. Now Should I have to make Trust port on Server farm switch where DHCP server is hosted? Can DHCP snooping cross L-3 domain?

1 REPLY
Cisco Employee

Re: DHCP Snooping

Yes, you have the trust interface from where the DHCP packets will be travelling to the switches. If its a trunk port, trust the trunk port. If it is a Vlan SVI or L3 port using the IP helper-address command to DHCP relay, trust the ports as well.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_see/configuration/guide/swdhcp82.html#wp1070843

HTH

114
Views
0
Helpful
1
Replies
CreatePlease login to create content