3Com Router Command Reference Guide — V1.006.1.22 fr compression vjSyntaxfr compression vj [ passive ]undo fr compression vjViewInterface viewParameterpassive: Passive compression mode will be used on the interface. By default, activeheader compression.DescriptionUsing the fr compression vj command, you can enable the VJ compression of TCP/IPpacket header. Using the undo fr compression vj command, you can disable the VJcompression of TCP/IP packet header.Only when the Frame Relay datagram format is nonstandard can TCP/IP headercompression be enabled. TCP/IP header compression can either be specified on aninterface or be specified when configuring the static mapping.Example# Configure interface Serial 0 to use the passive TCP/IP header compression.[3Com-Serial0]fr compression vj passive6.1.23 fr congestion-thresholdSyntaxfr congestion-threshold { de | ecn } queue-percentageundo fr congestion-threshold { de | ecn }ViewInterface viewParameterde: Discard the Frame Relay packets that are marked with DE bit if congestion occurs.ecn: Process the BECN and FECN bits in the Frame Relay packets if congestionoccurs.queue-percentage: Network congestion threshold that is the utilization rate of interfacequeue. It is the percentage that the current interface queueing length occupies the totalqueueing length, ranging from 0 to 100. The default value is 100.108
