End to End Recovery (GMPLS Layer)
Page 432 7450 ESS MPLS Guide
Figure 43: gLSP Re-Establishment (PATH Refresh)
Full LSP Rerouting
Full LSP rerouting (or restoration), specified in RFC 4872 section 11, switches normal traffic to an
alternate LSP that is not even partially established until after the working LSP failure occurs. The
new alternate route is selected at the LSP head-end node; it may reuse resources of the failed LSP
at intermediate nodes and may include additional intermediate nodes and/or links.
SR/XRS
UNI-C UNI-N
UNI-C
SRLG
SR/XRS
UNI-CUNI-N
UNI-N UNI-C
OTN/photonic
switches
SRLG
Diverse
UNI-N
24858
Path, PathErr
X
Tunnel
group
IP
Tunnel
group
IP
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