The Cisco switch is connected to a generic 2Wire DHCP server. Everything works great, except….
I am installing some Ademco 8132 alarm keypads that are basically single-board computers that use DHCP. When plugged into the Cisco switch, they get no address.
Plug them into anything else, and they’re happy as a clam.
For example, if I plug a my trusty netgear four port switch into a port on the Cisco, and plug the keypads into the netgear switch,the devices get an IP just fine that way. So DHCP is working…somehow the Cisco is having some heartburn at layer 2??
Are there any magic Cisco settings to look at?
The Cisco is set to factory defaults, so there is only one VLAN. I believe Spanning Tree is turned on by default.
Do I maybe need to disable spanning tree? (the network topology is flat). Any other weird settings to fiddle with?