Re: vpn label understanding required

Hi,

If that is the case , so router must be keeping a database of label to VRF ,
how can we see that ....( command)

Regards
J.Daniels

On Thu, Jun 25, 2009 at 10:01 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:

> Yes, that is right.
>
>
> On Thu, Jun 25, 2009 at 10:25 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:
>
>> 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/>
>>>
>>
>>
>
>
> --
> 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 - 22:13:02 ART