Re: OSPF Virtual Links

From: Jonathan Stevens (jonathanstevens.net@googlemail.com)
Date: Thu Jan 26 2006 - 06:26:32 GMT-3


I've noticed that this seems to vary across platform/IOS

Scott Smith wrote:

>It should...
>
>Rack1R1#sh ip ospf nei
>Neighbor ID Pri State Dead Time Address Interface
>150.1.4.4 0 FULL/ - 00:00:28 155.1.146.4 OSPF_VL0
>150.1.4.4 1 FULL/DR 00:00:33 155.1.146.4 Ethernet0/0
>
>Rack1R1#sh ip ospf int
>OSPF_VL0 is up, line protocol is up
> Internet Address 0.0.0.0/0, Area 0
> Process ID 1, Router ID 150.1.1.1, Network Type VIRTUAL_LINK, Cost: 10
> Configured as demand circuit.
> Run as demand circuit.
> DoNotAge LSA allowed.
> Transmit Delay is 1 sec, State POINT_TO_POINT,
> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
> oob-resync timeout 40
> Hello due in 00:00:07
> Index 2/3, flood queue length 0
> Next 0x0(0)/0x0(0)
> Last flood scan length is 1, maximum is 1
> Last flood scan time is 0 msec, maximum is 0 msec
> Neighbor Count is 1, Adjacent neighbor count is 1
> Adjacent with neighbor 150.1.4.4 (Hello suppressed)
> Suppress hello for 1 neighbor(s)
>
>IOS Version 12.2(15)T14.
>
>I believe in previous versions IOS did not show this.
>
>-Scott
>
>On 1/14/06, Victor Cappuccio <cvictor@protokolgroup.com> wrote:
>
>
>>Why, If OSPF Virtual Links are considered to be an Interface in Area 0, they
>>do not appear in the show ip ospf neighbor and they do not appear also in
>>the show ip ospf interface??
>>
>>
>>
>>Rack1R4#show ip ospf neighbor
>>Neighbor ID Pri State Dead Time Address Interface
>>1.1.1.1 1 FULL/ - 00:00:32 136.1.41.1 Serial0.41
>>3.3.3.3 1 FULL/ - 00:01:51 136.1.234.3 Serial0.234
>>2.2.2.2 1 FULL/ - 00:01:54 136.1.234.2 Serial0.234
>>3.3.3.3 1 FULL/ - 00:00:34 136.1.43.3 Serial1
>>
>>
>>Rack1R4#show ip ospf interface | in is up
>>Serial0.41 is up, line protocol is up
>>Loopback0 is up, line protocol is up
>>Serial0.234 is up, line protocol is up
>>Serial1 is up, line protocol is up
>>
>>
>>Rack1R4#show ip ospf virtual-links
>>Virtual Link OSPF_VL0 to router 3.3.3.3 is up
>> Run as demand circuit
>> DoNotAge LSA allowed.
>> Transit area 34, via interface Serial1, Cost of using 64
>> Transmit Delay is 1 sec, State POINT_TO_POINT,
>> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
>> Hello due in 00:00:04
>> Adjacency State FULL (Hello suppressed)
>> Index 4/5, retransmission queue length 0, number of retransmission 0
>> First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
>> Last retransmission scan length is 0, maximum is 0
>> Last retransmission scan time is 0 msec, maximum is 0 msec
>> Message digest authentication enabled
>> Youngest key id is 1
>>Rack1R4#
>>
>>Thanks
>>Victor.
>>
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>
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