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New Member

loss of adjacency between isr4451x and 4510r-e

I'm currently having an issue with loss of connectivy between the above mentioned router and switch.


After a few hours the directly connected interfaces are unable to ping each other and as a side effect we lose our eigrp adjacency. Only a reload of the sup8e switching to it's failover brings the links back. I have tried the same setup replacing the 4510 with an 3750-e for testing which stays stable. So i need help with the 4510


Setup mpls---g0/0/1---4451- g0/0/3 ----  g1/1 ---- 4510-r-e

Router important parts

router bgp 65000
 bgp log-neighbor-changes
 network mask
 network mask
 network mask
 neighbor x.x.x.x remote-as xxxxx

router eigrp 100
 redistribute bgp 65000 metric 10000 1 255 1 1500
 passive-interface default
 no passive-interface GigabitEthernet0/0/3

interface GigabitEthernet0/0/3
 ip address
 speed 1000
 no negotiation auto
 vrrp 1 ip
 vrrp 1 priority 110
 vrrp 1 track 1 decrement 15

ip route Null0
ip route Null0
ip route Null0



router eigrp 100
 redistribute connected
 passive-interface default
 no passive-interface Vlan11

interface GigabitEthernet1/1
 switchport access vlan 11
 switchport mode access
 ip device tracking maximum 0
 speed 1000
 nmsp attachment suppress
 spanning-tree portfast


as you can see above i have placed commands into g1/1 trying to disable ip device tracking in case this is the culprit.  I havent had it running long enough for the links to go downto see with this addition.

interface Vlan11
 description Wan Vlan
 ip address


all is well for a few hours then all comunication stops between g0/0/3 and g1/1

I have even removed all eigrp and vrrp statements, shut and no shut the interface afterwords but still no ping once it happens. I have to reload a supervisor to get pings back.


the only difference between my 3750-e which works and this 4510r-e is this new ip device-tracking


anyone think it has to do with g0/0/3 having vrrp on it with a virtual mac address as well as the interface mac connected to g1/1 which has ip device tracking enabled ?



















New Member

Update, so far since

Update, so far since disabling the ip device tracking on the g1/1 port the connection has stayed stable. I'm not sure why device tracking would cause an issue or loss of connection. I have done some reading on device tracking and I hear of wierd issues such as win 7 machines receiving ip address already in use messages from dhcp received from the switch. If anyone has any experiance with device tracking I would love to here some responses. For now I am going to issue those commands across all ports since there is no global way of turning this off.