OSPF Error " EXSTART to DOWN "

Hello GS,

Time to Time I start getting the notification

*2d22h: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.3.3 on Vlan12 from EXSTART to
DOWN, Neighbor Down: Too many retransmissions
2d22h: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.3.3 on Vlan12 from DOWN to DOWN,
Neighbor Down: Ignore timer expired
*
and I start losing routes when I see " SH IP ROUTE "

SW1#sh ip ospf
neighbor

Neighbor ID Pri State Dead Time Address
Interface
4.4.3.3 1 FULL/BDR 00:00:32 4.4.12.3
Vlan12

SW1#sh system
mtu

System MTU size is 1504 bytes
R3#sh ip ospf
neighbor

Neighbor ID Pri State Dead Time Address
Interface
4.4.7.7 1 FULL/DR 00:00:30 4.4.12.7
FastEthernet0/0

R3#sh int fastEthernet
0/0

FastEthernet0/0 is up, line protocol is
up

  Hardware is MV96340 Ethernet, address is 001d.46f3.b838 (bia
001d.46f3.b838)
  Internet address is 4.4.12.3/24

  MTU 1500 bytes, BW 100000 Kbit, DLY 100
usec,

     reliability 255/255, txload 1/255, rxload
1/255

  Encapsulation ARPA, loopback not
set

  Keepalive set (10
sec)

  Full-duplex, 100Mb/s,
100BaseTX/FX

  ARP type: ARPA, ARP Timeout
04:00:00

  Last input 00:00:03, output 00:00:01, output hang
never

  Last clearing of "show interface" counters
never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
0
  Queueing strategy:
fifo

  Output queue: 0/40
(size/max)

  5 minute input rate 0 bits/sec, 0
packets/sec

  5 minute output rate 0 bits/sec, 0
packets/sec

     1151 packets input, 378891
bytes

     Received 1107 broadcasts, 0 runts, 0 giants, 0
throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0
ignored

     0
watchdog

     0 input packets with dribble condition
detected

     9141 packets output, 882911 bytes, 0
underruns

     0 output errors, 0 collisions, 0 interface
resets

     0 unknown protocol
drops

     0 babbles, 0 late collision, 0
deferred

     0 lost carrier, 0 no
carrier

     0 output buffer failures, 0 output buffers swapped out

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Received on Sat Apr 11 2009 - 09:26:26 ART