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DES-7200 Configuration Guide Chapter 3 MPLS Reliability Configuration
3-3
Fig 18 LDP GR flowchart
1) LSR 1 carries the optional parameter of FT Session TLV in the Initialization message to
indicate its support to LDP GR.
2) LSR 2 receives the Initialization message carrying FT Session TLV. Since LSR 2 supports
LDP GR, it will also carry the optional parameter of FT Session TLV in the Initialization
message. After LSR 1 receives the Initialization message from LSR 2, a GR-Capable LDP
session is established.
3) LSR1 and LSR2 exchanges address information and label mapping information.