O'Reilly logo

MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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

AToM and QoS

You can use QoS in MPLS networks to prioritize certain packets, just as you would prioritize IP packets. In the case of IP, you set the precedence or DiffServ Codepoint (DSCP) bits in the IP header to prioritize the IP packet. In the case of MPLS, you prioritize the packet by setting the Experimental (EXP) bits to a value between 0 and 7. The MPLS payload is a frame instead of an IP packet in the case of AToM. Three possibilities exist for marking the EXP bits:

  • Statically configuring the setting of the EXP bits

  • Marking the EXP bits according to the IP precedence bits

  • Using information from the frame header to set the EXP bits

You can statically configure the EXP bits by using Modular QoS Command Line Interface (MQC) on the router. ...

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