[c-nsp] Eigrp K-value mismatch

[Ramon Alvarez]

Hello,

We have EIGRP in our network, 4 weeks ago we are having troubles because
eigrp restart with k value mismatch, but we verify every router and this
value are the same, after few seconds the session is established again but
this behavior repeat every 4 or 6 hours.

Also looking information at Cisco site, we found that a new feature good bye
messages could cause this type of message but without affect the
functionality of eigrp.

"Note The receipt of a goodbye message by a nonsupporting peer does not
disrupt normal network operation. The nonsupporting peer will terminate
session when the hold timer expires. The sending and receiving routers will
reconverge normally after the sender reloads."

Also when this occur both cisco 1721 restart the eigrp session.

Sw3550#show ip eigrp neighbors 
IP-EIGRP neighbors for process 10
H   Address         Interface       Hold Uptime   SRTT   RTO  Q  Seq Type
                                            (sec)         (ms)       Cnt Num
2   10.100.215.21       Fa0/3             11 04:21:06   22   200  0  11294
1   10.100.228.12       Fa0/6             14 04:22:33   10   200  0  85486

Our equipments are:

(1) Ws-3550-24-EMI (C3550-IPSERVICESK9-M), Version 12.2(25)SEE2
(2) Cisco 1721 (C1700-Y-M), Version 12.3(3a)

Here is the log:

Feb 21 00:22:40.117: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 00:22:45.077: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency
Feb 21 02:41:12.790: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 02:41:17.582: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency
Feb 21 02:41:50.189: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 02:41:54.649: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency
Feb 21 02:43:04.107: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 02:43:09.043: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency
Feb 21 03:27:52.407: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 03:27:56.891: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency
Feb 21 03:28:17.537: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.228.12(FastEthernet0/6) is down: K-value mismatch
Feb 21 03:28:20.945: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.228.12(FastEthernet0/6) is up: new adjacency
Feb 21 03:28:51.900: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 03:28:56.360: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency
Feb 21 03:29:43.884: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is down: K-value mismatch
Feb 21 03:29:48.497: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
10.100.215.21 (FastEthernet0/3) is up: new adjacency