November 2006
Beginner
672 pages
15h 30m
English
Content preview from MPLS Fundamentals
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Summary
Today the usage of quality of service (QoS) has become widespread. Most networks use some kind of QoS at some routers. MPLS networks could not stay behind for long. Most MPLS networks already have QoS, or the network administrators have started to implement QoS. The propagation of QoS in MPLS networks is done through the usage of the experimental bits in the labels.
The Experimental (EXP) bits in the top label in the label stack determine the QoS of the packet and how it will be treated when a label switching router (LSR) forwards it. This chapter explained how the propagation of the QoS information works for labeled packets. It also explained what happens to the EXP bits value when a label is popped, swapped, or pushed. This chapter ...
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