Label Distribution Protocol (LDP) uses TCP to establish sessions between the devices. This feature enables the configuration of TCP Maximum Segment Size (MSS) that defines the maximum segment size in a single TCP segment during a communication session. The configuration of the TCP MSS for LDP neighbors helps the neighbors adjust the MSS value of the TCP SYN packet. The configurable MSS range is from 560 to 1440. Configure the TCP MSS through the CLI and NetConf interface.

For more information, refer to the TCP MSS configuration for LDP sessions section in the OcNOS Key Feature document, Release 6.4.1.