August 1999
Intermediate to advanced
328 pages
8h 50m
English
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LABEL-SWAPPING PROTOCOLS
A separate book in this series is being devoted to label swapping, but we should mention it here because the technology offers a very fast, low delay switching service to IP datagrams, and fast, low delay is a vital part of reducing latency in VoIP traffic.
Several methods are employed to implement label swapping, also known as label switching or tag switching. Many of them are similar ... variations on the same theme.
Some techniques use the concept of a flow, which is a sequence of user packets from one source machine or application to one or more machines or applications. For a "long" flow (many packets flowing between these entities), a router can cache information about the flow and circumvent the traditional IP-routing ...