[j-nsp] explicit-null

[david.roy at orange-ftgroup.com]

For the Q2 : extracted from the RFC 3032 :

"MPLS Label Stack Encoding :

A value of 0 represents the "IPv4 Explicit NULL Label". This label value is only legal at the bottom of the label stack. It indicates that the label stack must be popped, and the forwarding of the packet must then be based on the IPv4 header."


So, Junos is not compliant of the RFC ???

David

 

-----Message d'origine-----
De : Danny Vernals [mailto:danny.vernals at gmail.com] 
Envoyé : jeudi 9 octobre 2008 17:15
À : ROY David DTF/DERX
Cc : juniper-nsp at puck.nether.net
Objet : Re: [j-nsp] explicit-null

On Wed, Oct 1, 2008 at 11:03 AM,  <david.roy at orange-ftgroup.com> wrote:
>
> Hi all,
>
> When I use Explicit null on my Egress router (in LDP), The Egress 
> advertises label 0 for its FEC : good.
>
> Q1:  I use MPLS VPN, therefore I have 2 Labels in the stack. The 
> penultimate LSR replaces the value of  the top label per 0. The router 
> keeps the EXP info and the second Label.  Is-it true ?
>

yes

> Q2: When the Juniper egress router receives the Label 0, It removes it 
> and performes a lookup on the second labal ? Is-it true ?
>

yes

Are you seeing behaviour that seems to conflict with this?

> Thanks
> David
>
>
>
>
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