Re: OSPF Error " EXSTART to DOWN "

Thanks.

I already have ip ospf mtu-ignore.

So what could be the other possibility

On Sat, Apr 11, 2009 at 9:35 AM, Salah ElShekeil
<salah.elshekeil_at_gmail.com>wrote:

> check out system mtu !!
>
>
> use ip ospf mtu ign interface level command
> On Sat, Apr 11, 2009 at 9:26 AM, Paul Adams <ccie.paul_at_gmail.com> wrote:
>
>> 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 - 09:52:48 ART