Hello!
I am facing a problem with an OSPF link between an ASR and a 6509. It has been working fine for months and all of a suden the process went down, and is stuck in EXCHANGE/EXSTART states . I have another OSPF link (for redundancy purpose) between these two devices that is still working fine.
Interface on the ASR:
interface GigabitEthernet0/0/2
description -- 6509 Gi3/1
ip address xxx.xxx.247.243 255.255.255.254
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip portbundle outside
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 7 0607032E444F071C11
ip ospf network point-to-point
load-interval 30
negotiation auto
end
Interface on the 6509:
interface GigabitEthernet3/1
description -- ASR1002 Gi0/0/2
ip address xxx.xxx.247.242 255.255.255.254
no ip redirects
no ip unreachables
no ip proxy-arp
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 7 0607032E444F071C11
ip ospf network point-to-point
ip ospf priority 128
end
I can ping between the two without pb (with different MTU size and df-bit set)
From the debug log it seems that the ASR receive the DBD from the 6509 and send it back but the 6509 doesn't, and it keeps on re-sending.
ASR log:
Dec 29 12:07:17.840: OSPF-65535 ADJ Gi0/0/2: Rcv DBD from xxx.xxx.247.255 seq 0x159E opt 0x50 flag 0x7 len 32 mtu 1500 state EXCHANGE
Dec 29 12:07:17.840: OSPF-65535 ADJ Gi0/0/2: Send DBD to xxx.xxx.247.255 seq 0x159E opt 0x50 flag 0x2 len 192
Dec 29 12:07:17.840: OSPF-65535 ADJ Gi0/0/2: Send with youngest Key 1
6509 log:
Dec 29 12:06:54.202: OSPF: Send DBD to xxx.xxx.247.254 on GigabitEthernet3/1 seq 0x159E opt 0x50 flag 0x7 len 32
Dec 29 12:06:54.202: OSPF: Send with youngest Key 1
Dec 29 12:06:54.202: OSPF: Retransmitting DBD to xxx.xxx.247.254 on GigabitEthernet3/1 [12]
Dec 29 12:06:56.410: OSPF: Send with youngest Key 1
Dec 29 12:06:58.714: OSPF: Send DBD to xxx.xxx.247.254 on GigabitEthernet3/1 seq 0x159E opt 0x50 flag 0x7 len 32
Dec 29 12:06:58.714: OSPF: Send with youngest Key 1
Dec 29 12:06:58.714: OSPF: Retransmitting DBD to xxx.xxx.247.254 on GigabitEthernet3/1 [13]
Dec 29 12:06:59.306: OSPF: Send with youngest Key 1
Any suggestion or pointer of things I should check is more than welcome.
Best!
