[c-nsp] RES: MPLS-EXP Marking on 6k PE

[Leonardo Gama Souza]

Hi.
-----Mensagem original-----
De: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] Em nome de cisconsp at secureobscure.com
Enviada em: terça-feira, 7 de dezembro de 2010 14:49
Para: cisco-nsp at puck.nether.net
Assunto: [c-nsp] MPLS-EXP Marking on 6k PE

Good morning list, I have a 6500 (720-3c, 6716) functioning as a PE, and
have a QOS question regarding its label imposition process.

 

1)       Will a packet entering via a SVI in a VRF (MPLS L3 VPN) have its IP
PREC bits automagically copied into the MPLS-EXP bits, or do I need to apply
an ingress policy map on every PE-CE interface & SVI translating
IP-PREC/DSCP to MPLS-EXP?
It´s automatically copied. Nothing to worry about.
 

2)       Do I need to configure "mls qos trust dscp" on the PE-CE ingress
SVI in a VRF? Or just the switchport? Or Both?
Just the switchport.
 

3)       Do I need to configure "mls qos trust something" on the PE-P
interfaces so that MPLS-EXP is respected and not stripped off?
Only if it's used L2 switchport.
 

I don't currently use any L2 or L3 QOS on the 6500, and just want the IP
PREC bits marked and passed upstream to the P routers for prioritization in
the core.

 

Thanks!

 

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