06-03-2014 08:44 AM - edited 03-07-2019 07:37 PM
I have a 3750 switch (c3750-ipservicesk9-mz.122-55.SE3) that I am configuring DHCP snooping on.
I can configure dhcp snooing trust on a FE port, but can't on a GE uplink port - there is no snooping option under that interface as you can see below.
VoIP-MDF-RS3750(config)#int f1/0/47
VoIP-MDF-RS3750(config-if)#ip dhcp ?
client DHCP client configuration
limit Limit DHCP Lease
relay DHCP relay configuration parameters
server Configure DHCP server behavior
snooping DHCP Snooping
VoIP-MDF-RS3750(config-if)#int g1/0/1
VoIP-MDF-RS3750(config-if)#ip dhcp ?
client DHCP client configuration
limit Limit DHCP Lease
relay DHCP relay configuration parameters
server Configure DHCP server behavior
VoIP-MDF-RS3750(config-if)#ip dhcp
How do I trust the GE uplink of the switch for DHCP snooping?
Solved! Go to Solution.
06-03-2014 08:52 AM
I figured out why the GE port doesn't allow for 'ip dhcp snooping trust'. Only an L2 port can have dhcp snooping trust on it - an L3 port doesn't have that option. I had an IP address configured on the GE port, therefore no snooping trust option was available.
06-03-2014 08:52 AM
I figured out why the GE port doesn't allow for 'ip dhcp snooping trust'. Only an L2 port can have dhcp snooping trust on it - an L3 port doesn't have that option. I had an IP address configured on the GE port, therefore no snooping trust option was available.
06-06-2014 01:51 PM
Hey,
Configure the command switchport under Gig interface and then you should be able to configure snooping trust.
Regards,
RS
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