Re: neighborship in OSPF between different network types.

Thanks Scott ..I labbed it , it was full but nothing in the routing table
and also database didn't have any type3 lsa's

I never seen this before...

----- Original Message -----
From: "Scott Morris" <smorris_at_ine.com>
To: "Mohamed El Henawy" <m.henawy_at_link.net>
Cc: "Ali El Moussaoui" <mousawi.ali_at_gmail.com>; "Naufal Jamal"
<naufalccie_at_yahoo.in>; <ccielab_at_groupstudy.com>
Sent: Monday, September 14, 2009 4:51 PM
Subject: Re: neighborship in OSPF between different network types.

> Agreement on DR/BDR information (or necessity) is NOT required per the
> RFC. That's an oversight in my mind, because it sure as hell matters
> for your database! :) And even though you may be in full, and even
> though your DBDs have been exchanged (show ip ospf database), you'll see
> nothing or limited information "approved" in "show ip route".
>
>
>
>
> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,
>
> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>
> JNCI-M, JNCI-ER
>
> evil_at_ine.com
>
>
> Internetwork Expert, Inc.
>
> http://www.InternetworkExpert.com
>
> Toll Free: 877-224-8987
>
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> Knowledge is power.
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>
> Study hard and be Eeeeviiiil......
>
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>
> Mohamed El Henawy wrote:
>> Thanks Ali ...I thought that they should not reach Full status
>>
>>
>> ----- Original Message -----
>> From: Ali El Moussaoui
>> To: Mohamed El Henawy
>> Cc: Naufal Jamal ; ccielab_at_groupstudy.com
>> Sent: Monday, September 14, 2009 1:42 PM
>> Subject: Re: neighborship in OSPF between different network types.
>>
>>
>> Mohamed,
>>
>> The status is full but they will never exchange routes. Check that R2
>> consider R1 as BDR (broadcast network) while R1 didnt go DR/BDR election
>> process (p2p network). This is due to the incompatibility of network
>> types.
>>
>> As mentioned above once u get 2 compatible networks u can tweak the
>> timers
>> if needed.
>>
>> Ali
>>
>>
>> On Mon, Sep 14, 2009 at 12:35 PM, Mohamed El Henawy <m.henawy_at_link.net>
>> wrote:
>>
>> I can see status is Full...so whats wrong then
>>
>>
>> ----- Original Message ----- From: "Naufal Jamal"
>> <naufalccie_at_yahoo.in>
>> To: <ccielab_at_groupstudy.com>
>> Sent: Monday, September 14, 2009 10:22 AM
>> Subject: neighborship in OSPF between different network types.
>>
>>
>>
>>
>> HI Guys ,
>>
>> correct me if I am wrong.
>>
>> I have two routers R1 and R2 directly connected.Ospf is configured
>> on
>> them.
>>
>> R1 's network type is point-to-point and R2 is of broadcast type.
>>
>> I was bit amazed when the neighborship came up between them.then I
>> realised
>> may be its the same hello/dead timer interval due to which they
>> came
>> up.they
>> became neighbours but not adjacent as they were not exchanging
>> routes
>> with
>> each other.Can some one help me understanding this concept or give
>> me a
>> link
>> for it ?
>>
>> R2#sh ip ospf ne
>> Neighbor ID Pri State Dead Time Address Interface
>> 1.1.1.1 1 FULL/BDR 00:00:38 1.1.1.1
>> FastEthernet0/
>> 0
>> R2#sh ip ospf net
>> R2#sh ip ospf int
>> Loopback1 is up, line protocol is up
>> Internet Address 10.20.10.1/24, Area 0
>> Process ID 1, Router ID 1.1.1.2, Network Type LOOPBACK, Cost: 1
>> Loopback interface is treated as a stub Host
>> FastEthernet0/0 is up, line protocol is up
>> Internet Address 1.1.1.2/24, Area 0
>> Process ID 1, Router ID 1.1.1.2, Network Type BROADCAST, Cost: 1
>> Transmit Delay is 1 sec, State DR, Priority 1
>> Designated Router (ID) 1.1.1.2, Interface address 1.1.1.2
>> Backup Designated router (ID) 1.1.1.1, Interface address 1.1.1.1
>> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit
>> 5
>> Hello due in 00:00:02
>> Index 1/1, 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 0 msec
>> Neighbor Count is 1, Adjacent neighbor count is 1
>> Adjacent with neighbor 1.1.1.1 (Backup Designated Router)
>> Suppress hello for 0 neighbor(s)
>>
>> R1#sh ip ospf ne
>> Neighbor ID Pri State Dead Time Address Interface
>> 1.1.1.2 1 FULL/ - 00:00:32 1.1.1.2
>> FastEthernet0/
>> 0
>> R1#sh ip ospf int
>> FastEthernet0/0 is up, line protocol is up
>> Internet Address 1.1.1.1/24, Area 0
>> Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_POINT,
>> Cost: 1
>> Transmit Delay is 1 sec, State POINT_TO_POINT,
>> Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit
>> 5
>> Hello due in 00:00:02
>> Index 1/1, 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 1.1.1.2
>> Suppress hello for 0 neighbor(s)
>>
>>
>> Thanks,
>> Naufal
>>
>>
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>>
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>>
>>
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>> Version: 8.5.409 / Virus Database: 270.13.96/2369 - Release Date:
>> 09/14/09
>> 05:51:00
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>> Version: 8.5.409 / Virus Database: 270.13.96/2369 - Release Date:
>> 09/14/09
>> 05:51:00
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No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.409 / Virus Database: 270.13.96/2369 - Release Date: 09/14/09
05:51:00

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Received on Mon Sep 14 2009 - 15:57:22 ART