Re: vpn label understanding required

Hi,

so it means LFIB lookup is done , which sees [V] VPN label and forwards to
the appropriarate VRF. so if a router has 200 VRF and each VRF is orignating
2 routes so it means 400 UNIQUE LABELS will identify which VRF to forward
the traffic.

Regards
J.daniels

On Thu, Jun 25, 2009 at 9:28 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:

> Jack,
>
> I see what you mean, good question. If you so "show mpls fowarding-table
> detail" you will see the VPN. I think this would be a function of looking up
> the label in the LFIB when the prefix is listed with [V].
>
>
> On Thu, Jun 25, 2009 at 9:47 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:
>
>> Hi,
>>
>> I got that but my querrie still stands - let me put it other way
>>
>> ( 1.1.1.0/24)CE1--VRF <http://1.1.1.0/24%29CE1--VRF>K--PE1----P1----PE2----CE2
>> packet from CE2 reaches PE1 with VPN label , now what will hapen .... will
>> router say it has stamp of label Y which is for VRF X ?
>>
>> Regards
>>
>>
>>
>> On Thu, Jun 25, 2009 at 8:45 PM, Bryan Bartik <bbartik_at_ipexpert.com>wrote:
>>
>>> Jack,
>>>
>>> Yes, each prefix learned in the VRF would have a different label. I would
>>> not associate labels with VRFs, but rather with the prefix learned in the
>>> VRF. The bottom label corresponds to the egress PE, the inner label
>>> corresponds to the prefix in the VRF.
>>>
>>> On Thu, Jun 25, 2009 at 7:06 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:
>>>
>>>> Hi group,
>>>>
>>>> I have routers
>>>>
>>>> ( 1.1.1.0/24)CE1--VRF <http://1.1.1.0/24%29CE1--VRF>K--PE1----P1----PE2----CE2
>>>>
>>>> now when pkt is forwarded from CE2 for 1.1.1.0/24 it has VPN label Y.
>>>> On
>>>> reaching PE1 it sees label Y = VRF K....
>>>> so it means that if a router has 2000 vrf on it , so it will asign
>>>> unique
>>>> labels per vrf for each prefix to advertise in vrf ?
>>>>
>>>> Regards
>>>> J.Daniels
>>>>
>>>>
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>>>
>>>
>>> --
>>> Bryan Bartik
>>> CCIE #23707 (R&S), CCNP
>>> Sr. Support Engineer - IPexpert, Inc.
>>> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>>>
>>
>>
>
>
> --
> Bryan Bartik
> CCIE #23707 (R&S), CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>

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Received on Thu Jun 25 2009 - 21:55:06 ART