[j-nsp] MPLS EXP bit marking question

[Christian Martin]

One reason to do this is to use a different egress PE classification  
scheme and rewrite ruleset than what is used in the core.  This  
allows for setting different core EXP values than what would be  
preserved at egress and then, potentially, used for egress marking,  
thus maintaining TOS transparency end-to-end.  I believe this is  
called the short-pipe model.

C

On Jun 8, 2009, at 8:26 AM, Lynch, Tomas wrote:

> Why would you want to do that? Labels are used only inside your  
> backbone
> where you have the same QoS policy in all the routers. It's going  
> to be
> a burden to configure QoS policies on interfaces because you will have
> to think "is this router doing the PHP or not?"
>
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Li Zhu
> Sent: Sunday, June 07, 2009 7:46 PM
> To: masood at nexlinx.net.pk
> Cc: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] MPLS EXP bit marking question
>
> Masood, Nugroho
>
> Thank you for the reply. I agree with both of you that rewrite takes
> effect
> on both inner and outer mpls label. My next question is:
> what if I want to mark inner and outer MPLS label differently? Say I
> want
> mark the inner exp with 5 and outer exp with 6? Is it possible to
> achieve
> this?
>
> Thanks,
>
> Li
>
> On Sun, Jun 7, 2009 at 4:10 PM, <masood at nexlinx.net.pk> wrote:
>
>> the rewrite-rule will take effect on both tags and all the labels in
> label
>> stack.
>>
>> Regards,
>> Masood
>>
>>> All,
>>>
>>> There is a network like CE --- PE --- P. The PE is M320. Traffic is
> from
>>> CE
>>> to P. The traffic out of CE is native IP, after it reaches and gets
> out
>> PE
>>> (then to P), it is double-tagged with MPLS lable. There is a exp
>>> rewrite-rule applied on PE link to P router. My questions is
>>> will the rewrite-rule take effect on both tags or only the outer
> tag?
>>>
>>> Thanks,
>>>
>>> Li
>>> _______________________________________________
>>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>>>
>>
>>
>>
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