We have the following configuration:
router --> switchA --> switchB
Cisco 3845 router
=============
int gi0/0 --> connected to our WAN
int gi0/1 --> connected to our local network
int gi0/1.8 --> local network sub-interface
encap dot1q 8
ip address 10.10.8.1
Cisco 2960 switch (switchA)
=====================
int gi1/0/49
switchport mode trunk
!
int gi1/0/50
switchport mode trunk
!
vlan 1
vlan 8
!
Cisco 2960 switch (switchA)
=====================
int gi1/0/49
switchport mode trunk
!
vlan 1
vlan 8
!
Router
=====
int gi0/0 is connected to our WAN
int gi0/1 is connected to the 2960 switch (switchA)
Switch A
=======
int gi1/0/49 is connected to the router
int gi1/0/50 is connected to switchB
Switch B
=======
int gi1/0/49 is connected to switchA
If we run the command CDP NEIGHBORS on the router, all we see are devices on the other side of int gi0/0 (WAN link) and nothing on the local network (switchA)
If we run the command CDP NEIGHBORS on switchA we see the router and switchB
We have looked at the configuration on the router and switches and cannot figure out why the router does not see any local devices using the CDP NEIGHBORS command. Tried CDP RUN on the router and CDP ENABLE on int gi0/1 and gi0/1.8.
Any thoughts here?
