Re: neighborship in OSPF between different network types.

http://www.cisco.com/en/US/customer/tech/tk365/technologies_tech_note09186a0080094050.shtml

http://ardenpackeer.com/routing-protocols/tutorial-ospf-network-types-and-frame-relay-part-4/

thanks..
garry..

On Mon, Sep 14, 2009 at 3:26 PM, Ali El Moussaoui <mousawi.ali_at_gmail.com>wrote:

> Naufal,
>
> Neighborship will come up since the timers are of same values but adjacency
> will never occur due to the fact that Broadcast networks require DR/BDR
> while point-to-point networks dont.
>
> HTH
>
> On Mon, Sep 14, 2009 at 10:22 AM, Naufal Jamal <naufalccie_at_yahoo.in>
> wrote:
>
> > 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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-- 
Garry L. Baker
"There is no 'patch' for stupidity." - www.sqlsecurity.com
Blogs and organic groups at http://www.ccie.net