MPLS and RSVP-TE
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MPLS Guide
© 2022 Nokia.
Use subject to Terms available at: www.nokia.com
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3.5.2 Automatic Creation of RSVP-TE LSPs
Automatic creation of RSVP-TE LSPs enables the automated creation of point-to-
point RSVP-TE LSPs within a single IGP IS-IS level or OSPF area that can
subsequently be used by services and/or IGP shortcuts. The feature is divided into
two modes: creation of an RSVP-TE LSP mesh, and creation of single-hop
RSVP-TE LSPs.
When creating an RSVP-TE LSP mesh, the mesh can be full or partial, the extent of
which is governed by a prefix list containing the system addresses of all nodes that
should form part of the mesh. When using single-hop RSVP-TE LSPs, point-to-point
LSPs are established to all directly connected neighbors.
The use of automatically created RSVP-TE LSPs avoids manual configuration of
RSVP-TE LSP meshes. Even when provisioning tools are used to automatically
provision these LSPs, automatic creation of a mesh still provides a benefit by
avoiding increased configuration file sizes.
3.5.3 Automatic Creation of RSVP-TE LSP Mesh (Auto-
LSP)
This feature enables the automatic creation of an RSVP-TE point-to-point LSP to a
destination node whose router ID matches a prefix in the specified peer prefix policy.
This LSP type is referred to as an auto-created LSP mesh. To start the process of
automatically creating an RSVP-TE LSP mesh, the user must create a route policy
referencing a prefix list. This prefix list contains the system addresses of all nodes
that are required to be in the mesh, and can be entered as a series of /32 addresses,
or simply as a range.
After the route policy is created, the user must create an LSP template containing the
common parameters that are used to establish all point-to-point LSPs within the
mesh. The template must be created with the keyword mesh-p2p:
config>router>mpls>lsp-template template-name mesh-p2p
Upon creation of the template, CSPF is automatically enabled and cannot be
disabled. The template must also reference a default path before it can be placed in
a no shutdown state.
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