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Configuring an RSVP-TE Tunnel
MPLS TE reserves resources for RSVP-TE tunnels. These tunnels are established along specified paths, not passing through congested nodes, balancing traffic on a network.
Usage Scenario
The dynamic RSVP-TE signaling protocol adjusts a path of a TE tunnel to adapt to network topology changes. To help implement advanced functions, such as TE FRR or CR-LSP backup, use the RSVP-TE signaling protocol to set up an MPLS TE tunnel.
- Enabling MPLS TE and RSVP-TE
MPLS TE and RSVP-TE must be enabled on each LSR in an MPLS domain before TE functions are configured. - Configuring CSPF
Constrained Shortest Path First (CSPF) is configured to calculate the shortest path destined for a specified node. - Configuring IGP TE (OSPF or IS-IS)
After IGP TE is configured on all LSRs in an MPLS domain, a TEDB is generated on each LSR. - (Optional) Configuring TE Attributes for a Link
TE attributes, such as the link bandwidth, administrative group attribute, affinity property, and shared risk link group (SRLG) can be configured to select a link for a CR-LSP. - (Optional) Configuring an Explicit Path
An explicit path is configured on the ingress of an MPLS TE tunnel. It defines the nodes through which the MPLS TE tunnel must pass or the nodes that are excluded from the MPLS TE tunnel. - Configuring an MPLS TE Tunnel Interface
An MPLS TE tunnel is established and managed on a tunnel interface. Therefore, the tunnel interface must be configured on the ingress of an MPLS TE tunnel.
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