> -----Original Message----- > From: [email protected] [mailto:juniper-nsp- > [email protected]] On Behalf Of Ibariouen Khalid > Sent: Tuesday, December 01, 2009 7:43 AM > > Dear community > Can someone send me a document which explains QoS in L2VPN.
You'll probably not find a single comprehensive guide to doing QoS in an L2VPN environment. Having said that, all you really need to understand is the format of the frames/packets at various points in transit and apply the QoS parameters accordingly. Depending on the access circuit and what type of interface cards you're using, you'll have various options for performing classification, queuing, and scheduling on the PE, for example, if you're doing Ethernet L2VPNs, you can fully classify based on the 802.1p priority bits and treat accordingly. Here is where you'll rewrite the EXP bits in the MPLS header as you push the packets into the LSP, so you can achieve Per-Hop Behavior (PHP) in downstream nodes. On your P routers, you'd be doing Behavior Aggregate (BA) classification traffic based on the EXP bits, assuming you've marked them appropriately on the ingress PE. One other thing to point out, if you're doing IP internetworking style of L2VPNs, i.e. Frame Relay on one side, and ATM on the other, you can fully classify using the DSCP bits in the IP header on your ingress PE, since PEs fully look up to the Layer 3 headers in this environment. A good start would be the Class of Service configuration guide - http://www.juniper.net/techpubs/en_US/junos10.0/information-products/topic-c ollections/config-guide-cos/config-guide-cos.pdf Stefan Fouant www.shortestpathfirst.net GPG Key ID: 0xB5E3803D _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
