RE: Ospf Point-to-point to multipoint

From: Brian McGahan <bmcgahan_at_ine.com>
Date: Fri, 8 Mar 2013 10:37:58 -0600

"debug frame-relay packet" on the spokes and then ping the hub and the other spoke and you'll see what your problem is. Like Brian mentioned either you need to do Frame-Relay mappings between the spokes, or change the network type to point-to-multipoint which removes your requirement of needing the mappings. As it stands now the spokes won't be able to reach each other because they don't know which DLCI to send the packets out to reach each other.

HTH,

Brian McGahan, CCIE #8593 (R&S/SP/Security), CCDE #2013::13
bmcgahan_at_INE.com
 
Internetwork Expert, Inc.
http://www.INE.com

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Daniel Barney Briseqo
Sent: Friday, March 08, 2013 10:30 AM
To: Brian Dennis
Cc: Cisco certification
Subject: Re: Ospf Point-to-point to multipoint

The lab I am doing is asking for that:
- No frame relay maps between the spokes.
- Spokes should be point to point using the physical interface, so i change the network type with ip ospf network and i set the timers to be equal with ip ospf hello-timers -hub must be multipoint.

Ping with the hub works fine. From spoke to spoke, it is.

Daniel Barney Briseqo
"El zltimo minuto tambiin tiene 60 segundos"
daniel.barney.b_at_hotmail.com

On Mar 7, 2013, at 7:23 PM, Brian Dennis wrote:

> I'm assuming that your spokes are also multipoint (physical Frame
> Relay or multipoint subinterface) since you mentioned the spokes are
> not allowed the communicated directly. Is there a reason you don't
> have the spokes set to point-to-multipoint? Point-to-multipoint is
> designed to allow for reachability between the spokes without the need
> for mappings between spokes in the event the spokes are multipoint interfaces.
>
> --
> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
> bdennis_at_ine.com
>
> INE, Inc.
> http://www.INE.com
>
>
>
>
> On 3/7/13 4:53 PM, "Daniel Barney Briseqo"
> <daniel.barney.b_at_hotmail.com>
> wrote:
>
>> Hello there.
>> In this topology, over frame relay:
>>
>> R1-----------R2
>> |
>> |
>> R3
>>
>> -I only have frame relay maps from, R1 to R2 and from R1 to R3.
>> -Frame relay between the spokes is not allowed -The spokes must be
>> ospf network type point-to-point and the hub multipoint.
>> -I have changed the hello timers, so neighbors are UP.
>>
>> I have connectivity from hub to both spokes, but I dont have from
>> spoke to spoke.
>> Is this a split horizon issue?
>>
>> Rutes are being propagated well, I have announced the loopbacks on
>> ospf and I can see all of them on each router.
>>
>> Daniel Barney Briseqo
>> "El zltimo minuto tambiin tiene 60 segundos"
>> daniel.barney.b_at_hotmail.com
>>
>>
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Received on Fri Mar 08 2013 - 10:37:58 ART

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