Server 2012 DHCP issues

We have a new 2012 server we have installed at a client site that is running DHCP.  We are having issues getting it to distribute ip addresses from a relay.  We have Cisco 4705 providing the ip helper address of the new server.  The old DHCP server (2003) works fine, but the 2012 server is not sending out IP addresses to workstations at all.  Any ideas?
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SuperTacoAsked:
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rauenpcCommented:
Are the scopes enabled, do you have the firewall running, is DHCP snooping enabled on the network switches?
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SuperTacoAuthor Commented:
Scopes are enabled. Windows firewall is off.  DHCP snopping is enabled, it's not coming back with anything, even a debugs are coming back clean
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rauenpcCommented:
If dhcp snooping is enabled, you would need to make sure that the port connected to the new server is trusted. On a Cisco switch, the interface command would be "ip dhcp snooping trust". Would you be able to verify this? I know you said the debugs are coming back clean, but it doesn't hurt to double check.
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SuperTacoAuthor Commented:
will do.  That command is run on teh interface config context for the interface that connects to the sever NIC?
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rauenpcCommented:
Correct.
One thing to watch for, generally speaking, is scenarios that involve VMWare or Hyper-V. Enabling dhcp snooping trust on an interface will only work as long as the server stays on the interface. If the server were to migrate/vMotion, that trust needs to be on the physical port the server would be using after the migration.
Also, if the physical server is using NIC teaming/bonding, you will also need to apply the same command to the port-channel interface as well as the physical interfaces.
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SuperTacoAuthor Commented:
Ok it's a physical server.  Ran the command the ran debug ip dhcp snooping agent and event.   still nothing.  what am I missing?
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SuperTacoAuthor Commented:
issue resolved.  some idiot moved the server to a different port on the switch without telling me after I had enabled trust.  I'm going to punch them now...
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