Optical Network Segment Recovery

The router may request a particular GMPLS recovery type for a gLSP path segment that spans the optical network. This refers to the protection afforded to the gLSP path between the UNI-N nodes. The router supports the following segment protection types (code points are also shown):

• Unprotected: 0x00

• Source-Based Reroute (SBR) (Known as Full Rerouting in the IETF): 0x01

• Guaranteed Restoration (GR) (Also known as shared mesh restoration): 0x02

• Sub-network Connection Protection (SNCP) (1+1 bidirectional protection): 0x10

• Path Restoration Combined (PRC): 0x11

These resiliency options are configured under the segment-protection-type command for a specific path.

config
   router
      gmpls
         lsp gmpls-tunnel-name [gmpls-uni]
            to remote-uni-c-gmpls-router-id
            working-path path-name
               [no] segment-protection-type {unprotected | sbr | gr | sncp | prc}
               ...
               [no] shutdown

The default segment-protection-type setting is unprotected.

If the requested protection type cannot be satisfied by the optical network, the router generates a CLI warning and an SNMP trap.

Table 1 lists the recommended combinations of segment protection type and end-to-end protection type.