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There are two
approaches to label path control:
-
Independent path control means that LSRs are able to create label bindings and
distribute these bindings to their peers independently. This is
useful when bindings relate to information distributed by routing
protocols, and means that nodes can begin to label switch before the
completion of a path.
-
Ordered path control means label binding only takes place if the node is the
egress node for the particular FEC, or has received a label binding
for that FEC from its next hop. This approach is used to ensure that
a particular traffic class follows a path with a specified set of
QoS properties.
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