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MPLS
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Section 2.9 of the MPLS architecture [2] defines a label distribution
protocol as a set of procedures by which one Label Switched Router ...
... LSR) informs another of the meaning of labels used to forward
traffic between and through them. The MPLS architecture does not
assume a single label distribution protocol. This document is a
...
... RSVP for establishing label switched
paths (LSPs) in MPLS networks.
Several of the new features described in this document were motivated
...
... by the requirements for traffic engineering over MPLS (see [3]). In
particular, the extended RSVP ...
... 2] can associate labels with RSVP flows. When MPLS and
RSVP are combined, the definition of a flow ...
... explicitly routed path. Using this object, the paths taken by
label-switched RSVP-MPLS flows can be pre-determined, independent of
conventional IP routing ...
... LSPs, a node at the ingress edge of an MPLS
domain can control the path through which traffic ...
... domain can control the path through which traffic traverses from
itself, through the MPLS network, to an egress node. Explicit
routing ...
... concatenation of one or more label
switched hops, allowing a packet to be forwarded by swapping
labels from an MPLS node to another MPLS node ...
... transport-layer protocol." However, when
RSVP and MPLS are combined, a flow or session can be defined with
...
... The contents of a LABEL is a single label, encoded in 4 octets. Each
generic MPLS label is an unsigned integer in the range 0 through
...
... unsigned integer in the range 0 through
1048575. Generic MPLS labels and FR labels are encoded right aligned
in 4 octets ...
...
In MPLS a node may support multiple label spaces, perhaps associating
a unique space with each incoming interface ...
... error code "Routing problem" and the error
value "MPLS label allocation failure." This includes the case where
a label range has been specified and a label cannot be allocated from
...
... error code "Routing problem" and the error
value "MPLS being negotiated, but a non-RSVP capable router stands in
...
... stands in the path
9 MPLS label allocation failure
10 Unsupported L3PID
...
... router stands
in the path
9 MPLS label allocation failure
10 Unsupported L3PID
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... Awduche, D., Malcolm, J., Agogbua, J., O'Dell and J. McManus, "Requirements for Traffic Engineering over MPLS", RFC 2702, September 1999. ...
... Rosen, E., Tappan, D., Fedorkow, G., Rekhter, Y., Farinacci, D., Li, T. and A. Conta, "MPLS Label Stack Encoding", RFC 3032prop, January 2001. ...