EIGRP resets

[Ahmede]

I have a 3550 switch connected to two 7206 routers. We are running EIGRP between the 3.. For some reason the EIGRP neighbors on the 3550 to the 7206 reset every 1:19 minutes. No errors on the interfaces.

Nov 24 11:31:46: %DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor x.x.x.x (Vlan69) is down: retry limit exceeded

Nov 24 11:31:47: %DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor x.x.x.x(Vlan69) is up: new adjacency

The neighbor between the two routers on the same VLAN is working fine. There another EIGRP neighbor on the 3550 to another switch and it's working fine as well..

The 7206 is connected to the 3550 via GIG interface, and Fast interface on the switches..

Here's teh config of one of the 7206 routers

interface GigabitEthernet0/2

description Link to

ip address x.x.x.x

no ip proxy-arp

duplex full

speed 100

media-type rj45

no negotiation auto

end

Here's te config of the switch port

interface FastEthernet0/47

description xxxxx

switchport access vlan 69

switchport mode dynamic desirable

speed 100

duplex full

end

Any help please..

Thanks..

[vmoopeung]

The message "retry limit exceeded" comes , because you are not able to ack or recieve upates and the updates are going to be sent for 16 times.At this point the neigh adjacency will be resseted.

Kindly check your ip addresss and the subnet masks

[amit-singh]

Hi,

Try changing you switchport config like below:

interface FastEthernet0/47

description xxxxx

switchport access vlan 69

switchport mode acess

speed 100

duplex full

end

With switchport mode dynamic desirable switch port sends DTP frames out and try to setup trunk negotiation with the peer port. The port should be put on static mode access.

-amit singh