O'Reilly logo

Juniper Networks® Field Guide and Reference by Juniper Networks®, Cris Morris, Gary Drenan, Aviva Garrett

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

MPLS

In the traditional Layer 3 forwarding paradigm, as a packet travels from one router to the next, an independent forwarding decision is made at each hop. In an MPLS environment, the analysis of the packet header is performed just once, when a packet enters the MPLS cloud. The packet then is assigned to a stream, which is identified by a label, which is a short (20-bit), fixed-length value at the front of the packet. Labels are used as lookup indexes into the label forwarding table. For each label, this table stores forwarding information.

Traffic engineering allows you to control the path that data packets follow, bypassing the standard routing model, which uses routing tables. Traffic engineering moves flows from congested links to alternate ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required