Hi there,
I have a problem while configuring IP DHCP Snooping and ARP Inspection as well on the Access Switch where Cisco Access Points are connected. The topology is L3 Switch where DHCP server is configured for assigning IP addresses for APs. To this L3 switch is connected Wireless Controller and Access Switch. Now when I will turn on DHCP Snooping and ARP Inspection or one of them on the Access Switch, configure specific VLANs where these features should work and I set trust port which is the uplink port to the L3 switch, then the Access Points cannot get the IP address from the DHCP server. The uplink from Access Switch to the L3 switch has 2 ports in Port-Channel, so I set trust link on Port-Channel interface, but I saw that IP DHCP Snooping trust is also turned on on physical ports when I enter command "show ip dhcp snooping".
What can be wrong ? What can block DHCP communication between APs and DHCP ?
