Full Lsp Rerouting; Figure 43: Glsp Re-Establishment (Path Refresh) - Alcatel-Lucent 7450 Manual

End to End Recovery (GMPLS Layer)
UNI-C
Tunnel
IP
group
SR/XRS
UNI-C

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.
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Path, PathErr
SRLG
UNI-N
OTN/photonic
switches
UNI-N

Figure 43: gLSP Re-Establishment (PATH Refresh)

X
SRLG
Diverse
UNI-N UNI-C
Tunnel IP
group
SR/XRS
UNI-N UNI-C
7450 ESS MPLS Guide
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