We have two cisco routers 1841 and 1941. The 1841 keeps generating "holding time expired" and "interface goodbye recieved" about its neighbor the 1941. The VPN IPSec protocol seems to stay up. Unfortuanately the offinding router does not have verbose syslogs or a very large log byte size. Here is a example log:
Nov 27 17:04:21.848 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is down: Interface Goodbye received
Nov 27 17:04:25.000 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is up: new adjacency
Nov 27 17:06:39.137 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is down: Interface Goodbye received
Nov 27 17:06:39.161 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is up: new adjacency
Nov 27 17:07:40.668 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is down: Interface Goodbye received
Nov 27 17:07:44.243 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is up: new adjacency
Nov 27 17:09:55.492 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is down: Interface Goodbye received
Nov 27 17:09:58.888 CST: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 0.0.0.1 (Tunnel0) is up: new adjacency
CISCO 1941
interface Tunnel0
description --[ DataCenter ]--
ip address 192.168.192.2 255.255.255.252
ip access-group tac-in in
ip access-group test out
no ip redirects
ip tcp adjust-mss 1350
load-interval 30
keepalive 10 3
tunnel source 99.99.99.244
tunnel destination 99.99.99.96
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
description --[ COMPANY WAN ] --
ip address 99.99.99.244 255.255.255.224
ip access-group COMPANYWAN in
duplex auto
speed auto
crypto map CMap-HASH
!
interface GigabitEthernet0/1
description --[ COMPANY LAN ]
ip address 165.65.166.1 255.255.255.0
ip access-group tac in
duplex auto
speed auto
!
!
router eigrp 100
network LIST OMITED
redistribute static metric 50 1 1 1 1
no eigrp log-neighbor-changes
!
CISCO 1841
!
interface Tunnel0
ip address 192.168.192.1 255.255.255.252
no ip redirects
ip flow ingress
ip flow egress
ip tcp adjust-mss 1350
no ip mroute-cache
load-interval 30
tunnel source FastEthernet0/0
tunnel destination 99.99.99.244
crypto map CMap-HASH
!
interface FastEthernet0/0
description dist 0/16
ip address 99.99.99.96 255.255.255.192
ip access-group fa0-0-in in
ip access-group fa0-0-out out
no ip redirects
load-interval 30
speed 100
full-duplex
no cdp enable
crypto map CMap-HASH
!
interface FastEthernet0/1
description dist 0/17
ip address 172.25.0.5 255.255.248.0
no ip redirects
load-interval 30
speed 100
full-duplex
no cdp enable
!
router eigrp 100
redistribute static route-map StaticToEIGRP
network 172.25.0.0 0.0.7.255
network 192.168.192.0 0.0.0.3
auto-summary
!
