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Related Documentation
- LN Series
- Example: Configuring Synchronization Between LDP and IGPs
- M Series
- Example: Configuring Synchronization Between LDP and IGPs
- MX Series
- Example: Configuring Synchronization Between LDP and IGPs
- PTX Series
- Example: Configuring Synchronization Between LDP and IGPs
- T Series
- Example: Configuring Synchronization Between LDP and IGPs
Synchronization Between LDP and IGPs Overview
LDP is a protocol for distributing labels in non-traffic-engineered applications. Labels are distributed along the best path determined by the interior gateway protocol (IGP). If synchronization between LDP and the IGP is not maintained, the label-switch path (LSP) goes down. When LDP is not fully operational on a given link (a session is not established and labels are not exchanged), the IGP advertises the link with the maximum cost metric. The link is not preferred but remains in the network topology.
LDP synchronization is supported only on active point-to-point interfaces and LAN interfaces configured as point-to-point under the IGP. LDP synchronization is not supported during graceful restart.
Related Documentation
- LN Series
- Example: Configuring Synchronization Between LDP and IGPs
- M Series
- Example: Configuring Synchronization Between LDP and IGPs
- MX Series
- Example: Configuring Synchronization Between LDP and IGPs
- PTX Series
- Example: Configuring Synchronization Between LDP and IGPs
- T Series
- Example: Configuring Synchronization Between LDP and IGPs
