MPLS Guide MPLS and RSVP-TE
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te-metric
Syntax te-metric value
no te-metric
Context config>router>mpls>interface
Description This command configures the traffic engineering metric used on the interface. This metric is
in addition to the interface metric used by IGP for the shortest path computation.
This metric is flooded as part of the TE parameters for the interface using an opaque LSA or
an LSP. The OSPF-TE metric is encoded as a sub-TLV type 5 in the Link TLV. The metric
value is encoded as a 32-bit unsigned integer. The IS-IS-TE metric is encoded as sub-TLV
type 18 as part of the extended IS reachability TLV. The metric value is encoded as a 24-bit
unsigned integer.
When the use of the TE metric is enabled for an LSP, CSPF will first prune all links in the
network topology that do not meet the constraints specified for the LSP path. Such
constraints include bandwidth, admin-groups, and hop limit. Then, CSPF will run an SPF on
the remaining links. The shortest path among the all SPF paths will be selected based on the
TE metric instead of the IGP metric, which is used by default.
The TE metric in CSPF LSP path computation can be configured by entering the command
config>router>mpls>lsp lsp-name>cspf use-te-metric.
The TE metric is only used in CSPF computations for MPLS paths and not in the regular SPF
computation for IP reachability.
The no form of the command reverts to the default value.
Default no te-metric
Parameters value — 1 to 16777215
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