Re: OSPF Point to Multipoint

From: Shane <shane_at_shanekillian.net>
Date: Tue, 24 Jul 2012 20:49:45 +0100

See below, the show ip ospf int s0/0 shows this interface working as point to multipoint.
I'm guessing that this is the answer, it is point to multipoint but the Full / DR state that I am seeing is a cosmetic bug?

After a reboot, this changed to the corrected state though so I'm a little confused!

Rack14R1#show run int s0/0
Building configuration...

Current configuration : 239 bytes
!
interface Serial0/0
 ip address 155.14.0.1 255.255.255.0
 encapsulation frame-relay
 ip ospf network point-to-multipoint
 ip ospf priority 0
 ip ospf 1 area 0
 frame-relay map ip 155.14.0.5 105 broadcast
 no frame-relay inverse-arp
end

Rack14R1#

Rack14R1#show ip ospf int s0/0
Serial0/0 is up, line protocol is up
  Internet Address 155.14.0.1/24, Area 0
  Process ID 1, Router ID 150.14.1.1, Network Type POINT_TO_MULTIPOINT, Cost: 64
  Enabled by interface config, including secondary ip addresses
  Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
  Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
    oob-resync timeout 120
    Hello due in 00:00:11
  Supports Link-local Signaling (LLS)
  Index 1/2, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 2
  Last flood scan time is 0 msec, maximum is 4 msec
  Neighbor Count is 3, Adjacent neighbor count is 1
    Adjacent with neighbor 150.14.5.5
  Suppress hello for 0 neighbor(s)
Rack14R1#

On 24 Jul 2012, at 20:43, Joe Astorino wrote:

> Post your configurations on R1. Output of "show ip ospf interface
> brief" would be good on R1
>
> On Tue, Jul 24, 2012 at 3:40 PM, Shane <shane_at_shanekillian.net> wrote:
>> Hi all,
>>
>> I have a quick question, which might seem trivial to some of you but I can't answer it after reconfiguring several times and restarting OSPF processes.
>> I have FR hub and spoke topology, R5 is hub and R1 is a spoke.
>>
>> I have configured DLCI's with the broadcast command for all spokes in the network (but we must transit through R5 obviously).
>> I have configured with "ip ospf network point-to-multipoint).
>>
>> In this case, there should be no DR but on R1 I have the folioing output -
>>
>>
>>
>> Rack14R1#show ip ospf neighbor
>>
>> Neighbor ID Pri State Dead Time Address Interface
>> 150.14.5.5 1 FULL/DR 00:01:44 155.14.0.5 Serial0/0
>>
>>
>> Rack14R5#show ip ospf neigh
>> Rack14R5#show ip ospf neighbor
>>
>> Neighbor ID Pri State Dead Time Address Interface
>> 150.14.4.4 0 FULL/ - 00:00:37 155.14.45.4 Serial0/1/0
>> 150.14.1.1 0 FULL/ - 00:01:38 155.14.0.1 Serial0/0/0
>>
>> HOWEVER, if we look at the LSA database we don't' see "Net Link State" for area 0. Which is LSA type 2 and would be originated by the DR.
>>
>> Rack14R1#show ip ospf database | i (Area 0)
>> Router Link States (Area 0)
>> Summary Net Link States (Area 0)
>> Summary ASB Link States (Area 0)
>>
>> Did I just forget something? or am I right to expect Type 2 which I see state = FULL/DR ?
>>
>>
>> Thanks!
>>
>>
>> Shane
>> http://shanekillian.net
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
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>
>
>
> --
> Regards,
>
> Joe Astorino
> CCIE #24347
> http://astorinonetworks.com
>
> "He not busy being born is busy dying" - Dylan

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Received on Tue Jul 24 2012 - 20:49:45 ART

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