The MPLS WG Archive

["Zhao, Xingguo" <xzhao@celoxnetworks.com>]

-----Original Message-----
From: Vipul Sharma [mailto:vsharma@senecanetworks.com]
Sent: Tuesday, January 23, 2001 4:44 PM
To: 'Arturo Nunez'; mpls@UU.NET
Subject: RE: QoS and Labels: A question ??

First, I guess you probably won't run MPLS from your PC to Ingress LSP.
Maybe it is just access protocol such as PPPoA.
But you surely may have some SLA with the Ingress LSR, so he can
classify/police your packet based on the contract.

Second, For scalability, I guess the MPLS network will implement MPLS Diff
Serv which supports both E-LSP and L-LSP.

Your packet will either go through an E-LSP or L-LSP based on the CoS of
your packet.

The E-LSP or L-LSP will then satisfy the QoS requirement of your packet
without a hard guarantee due to the nature of DiffServ.

Xingguo

Arturo,
	This has to do with Forward Equivalency Class (FEC). Since the 2
services
in ur PC have different QoS req. you will like them to be handled diff. in
the Core network (perhaps to reflect their QoS). So you may have two LSP,
one for each service. Each LSP corresponds to a FEC.
	There is EXP bits in the MPLS Label that is there to convey the QoS
info.
Hope this helps and experts in this subj. pls. feel free to correct me if I
am wrong. Thanx.

Vip

-----Original Message-----
From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On Behalf Of Arturo
Nunez
Sent: Tuesday, January 23, 2001 5:25 PM
To: mpls@UU.NET
Subject: QoS and Labels: A question ??


Hi:
	I have a doubt about the relation between Labels and the QoS ??
	For example in  the follow network:

PC ==== Ingress LSR ---- Core Network[LSR] ------ Egress LSR === Server

	+ I have a 2 services that are running in the Server, with QoS
	different.
	+ Now if I connect from the PC,notice its one, to the Server for the
2
	services. Will I have 2 LSP ?? Hows is connected the QoS with the
labels
	?


	Regards
	Arturo Nunez