From: CCIE Hunter (cisco.ccie.guru@gmail.com)
Date: Wed Sep 03 2008 - 01:21:01 ART
After finishing carefully tested on my lab..Conclusion is that.
In the situation there is MPLS TE from ingress PE to P router, why we need
to enable mpls ldp on Tunnel is to bind VPNv4 destination into lable and
need to advertise to P router at the other end. So that when packet arrived
to P router,it will know how to forward thatpacket according to the
lable. That is the reason of enabling ldp on Tunnel. If PE & P is directly
connected it's still find. If they are not directly connected it also need
to configure on P router to listen LDP advertisement from PE. And also need
to enable that ldp between P router and egress PE. So that End to End VRF
connection established.
Thanks;)
On Wed, Sep 3, 2008 at 3:54 AM, Rich Collins <nilsi2002@gmail.com> wrote:
> I have seen in the Cisco documentation that you can still put the "mpls ip"
> on the TE even when not required such as the PE router. I understood this
> to me that it can be seen as a precaution for a reconfiguration where it
> might be necessary.
>
> So I guess you should put it on the P router in any case to 'be on the
> safe side".
>
> -Rich
>
> On Tue, Sep 2, 2008 at 5:24 AM, CCIE Hunter <cisco.ccie.guru@gmail.com>wrote:
>
>> I just want to know that, let say for example in MPLS TE environment
>> there
>> is TE from ingress to P router. To forward packet correctly until another
>> egress PE it need to enable ldp on Tunnel at headend and configure
>> targeted
>> session at P router(destination of TE) right? At that point what is
>> different between enabling LDP on Tunnel & enabling LDP on normal
>> interface(eg. interface of ingress that connected to P router).
>>
>> I 've read implementing MPLS VPN over TE from cisco.
>>
>> http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a0080125b01.shtml
>>
>> I know what is solution when TE from ingress to P router from that link.
>> But
>> still can't make it to understand since I don't want to learn technology
>> by
>> heard.
>> Let me highlight my question again.
>> Question: why need to enable ldp on Tunnel ? do we also need ldp on normal
>> interface of ingress?
>>
>> Best REgards
>> On Tue, Sep 2, 2008 at 5:11 PM, CCIE Hunter <cisco.ccie.guru@gmail.com
>> >wrote:
>>
>> > hi all experts.
>> > what is different between enablind ldp on normal interface like
>> serial.pos
>> > & enabling mpls ldp on tunnel interface for TE.
>> > Best Regards
>> > Thanks
>>
>>
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