[c-nsp] Mapping Between IP Precedence and MPLS EXP

[David Freedman]

<rant>

Yes, I'm amongst the bunch who find auto TOS reflection extremely 
annoying and would like a switch to turn it off.

With TOS reflection if you are providing a premium service to people who 
you allow to do their own TOS marking you need to re-mark all traffic on 
ingress from customers rather than being able to turn off the reflection 
and reflect TOS->EXP manually for customers thay pay for the service.

</rant>

Dave.

Oliver Boehmer (oboehmer) wrote:
> Alaerte Vidali <> wrote on Tuesday, April 10, 2007 12:22 PM:
> 
>> Do you know if any specific IOS version does not map Prec to EXP
>> automatically when traffic enters PE as IP packet and exit as labeled
>> packet?  
>> 
>> I have seen some books maping IP Prec to EXP manually and this made
>> me wonder if this is purely didatic or there is IOSs that needs it. 
> 
> I haven't come across a case where a manual mapping was required, the PE
> automatically sets the EXP bits accordingly (TOS reflection)..
> 
> There are DiffServ tunneling modes where you want/need to alter the
> default behavior. See
> <http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature
> _guide09186a0080110bd5.html#wp1131096> for addtl. info..
> 
> 	oli
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>