From: David Luu (wicked01@xxxxxxxxxxxxx)
Date: Sat Jun 01 2002 - 19:01:20 GMT-3
post your whole config
At 05:39 PM 6/1/2002 -0400, Yagnesh Patel wrote:
>David,
> I am sorry but you got this wrong. I don't see R3 as a root Bridge in
> R2 even thought i have appropriate frame-relay DLCI statements in all my
> routers. Now think again it means that R1 is not forwarding the BPDUs to R2.
>
>Just to clarify few things ....
>
>R1- sees R3 as a root bridge (this is fine}
>R3- sees It self as a Root bridge (this is fine because it is set to lower
>priority)
>R2- sees it self as a Root bridge """""This means R1 is not forwarding
>BPDUs from one spoke(R3) to another Spoke(R2)"""""""
>
>Thanks
>Yagnesh
>
>
>David Luu wrote:
>
>>i would like to clear this whole split-horizon thing...
>>
>>this is the scenario that Yagnesh has...
>>
>> ____R2
>> /
>>R1----<
>> \____R3
>>
>>R1 being a multipoint interface acting as a hub for R2 and R3...
>>
>>on R2, Yagnesh sees R3 as root bridge...the way STP works, a blocked port
>>will not send data and BPDUs...but he can see R3 as root bridge on R2,
>>the only way for R2 to know is through BPDUs
>>
>>the reason for him being able to see BPDUs is because of the mapping the
>>bridge to dlci's...if you ask yourself what does the map bridge
>>statements have to do with it, think about how frame relay in a
>>multipoint environment when you have to map ip's to dlci's, it works the
>>same way...you could have split-horizon turned on and it will still work
>>
>>in this scenario you need to manipulate R1 as the root bridge for it to
>>work properly
>>
>>
>>At 09:42 AM 6/1/2002 -0400, ying chang wrote:
>>
>>>Sorry, but I would agree with Serguei. We may not be able to call it
>>>split-horizon, but that's basically why we cannot bridge between 2
>>>spokes in multipoint FR environment. Bridge will not send data back out
>>>to the same port it receives from. I would try point-to-point if I must
>>>bridge spokes.
>>>
>>>Chang
>>>
>>>>From: David Luu <wicked01@ix.netcom.com>
>>>>Reply-To: David Luu <wicked01@ix.netcom.com>
>>>>To: "Bezverkhi, Serguei" <Serguei.Bezverkhi@hp.com>, "Yagnesh
>>>>Patel" <Yagnesh.Patel@verizon.net>
>>>>CC: <ccielab@groupstudy.com>
>>>>Subject: RE: FrameRelay multipoint interface and bridging
>>>>Date: Fri, 31 May 2002 21:49:38 -0700
>>>>
>>>>split horizon deals with routing updates being received and not sent out
>>>>the same interface...split horizon deals with layer 3, bridging is layer
>>>>1...it has no relevance in this scenario
>>>>
>>>>yagnesh...
>>>>
>>>>first of all, does your frame relay work? without any routing protocols
>>>>running...ping throughout the frame relay cloud, if you cant ping, then the
>>>>problem lies in your frame relay configs
>>>>
>>>>frame relay map bridge statements needs to be in all routers participating
>>>>in a bridged multipoint frame relay environment...R1s multipoint serial
>>>>interface, R2 and R3s serial interface (R1 will have 2 map bridge
>>>>statements)
>>>>
>>>>and the bridge group command on all interfaces participating...R1s
>>>>multipoint serial interface, R2s serial and ethernet, R3s serial and
>>>>ethernet
>>>>
>>>>
>>>>At 12:03 AM 6/1/2002 -0400, Bezverkhi, Serguei wrote:
>>>>
>>>>>It won't work because of the split horizon, and as far as I remember
>>>>>there is no way to disable it. You have to use point-to-point interfaces
>>>>>to resolve this.
>>>>>
>>>>>Hope it helps
>>>>>
>>>>>Serguei
>>>>>
>>>>>-----Original Message-----
>>>>>From: Yagnesh Patel [mailto:Yagnesh.Patel@verizon.net]
>>>>>Sent: May 31, 2002 10:41 PM
>>>>>To: ccielab@groupstudy.com
>>>>>Subject: FrameRelay multipoint interface and bridging
>>>>>
>>>>>
>>>>>Hi,
>>>>> Can anyone please provide me a good solution for the following problem.
>>>>>
>>>>>R1= Hub router with a multipoint interface
>>>>>R2 = Spoke_1 with Connected to R1's multipoint interface thru
>>>>>Frame-relay R3 = Spoke_2 Connected to R1's multipoint interface thru
>>>>>Frame-relay VLAN_2 = Connected to R2 router VLAN_3 = Connected to R3
>>>>>router
>>>>>
>>>>> I want to bridge VLAN2 and VLAN3. I have all appropriate commands under
>>>>>
>>>>>the interfaces / global including "frame-relay map bridge" statement but
>>>>>
>>>>>it is not working. I think it is not working because both spokes are
>>>>>connected to the same multipoint interface on R1.
>>>>>
>>>>>
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