Greetings. Something seemingly so simple is not working. A router and a Nexus are not seeing each other via CDP. I have a 2921 router connected to a Nexus 7000. Everything works fine, except for some mysterious reason CDP does not establish. Yes, it is enabled on both devices and not disabled on the relevant interfaces. The Nexus says this over and over again when debugging cdp errors:
2013 Feb 21 11:22:35.859986 cdp: cdpd_sdb_update_intf_entry: Entry Not Found. Adding intf-sdb entry for if-index 0x1a314000, device_index 1
2013 Feb 21 11:22:35.860012 cdp: sdb_write returns 1092222993
2013 Feb 21 11:22:35.860027 cdp: Unable to add intf-sdb entry for if-index 0x1a314000, device_index 1
Obviously this is not a show-stopper, since these two devices don't have to see each other via CDP to work fine, but it's definitely a head-scratcher. Here are the relevant interface configs:
Nexus
interface Ethernet102/1/1
spanning-tree port type edge
no shutdown
Router
interface GigabitEthernet0/1
ip address 10.10.10.251 255.255.255.0
duplex auto
speed auto
As you can see from the interface, it is plugged into a Nexus 2000 FEX--do those not work with CDP, or do they work in a different way?
I searched the web for the debug messages but turned up nothing. Any thoughts?
Thanks
