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IP Communications and Services for NGN
book

IP Communications and Services for NGN

by Johnson I Agbinya
December 2009
Intermediate to advanced content levelIntermediate to advanced
411 pages
12h 24m
English
Auerbach Publications
Content preview from IP Communications and Services for NGN
146 IP Communications and Services for NGN
1. e 20-bit label field is used to identify the packet to a particular LSP
2. e experimental bits (EXP), 3 bits, identify the class of service, which is used
for priority queuing through the network. At each hop along the path, the
EXP value determines which packets receive preferential treatment within
the tunnel.
3. e Stacking (S) bit shows that this MPLS packet has more than a label asso-
ciated with it.
4. TTL (8 bits), or the time-to-live value, gives the number of hops that this
MPLS packet is permitted to travel in the network. At each LSR, the TTL is
decremented by 1 until the TTL = ...
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Publisher Resources

ISBN: 9781420070910