3Com MSR 50 manual Fr compression frf9, Fr compression iphc, View Subinterface point-to-point view

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fr compression frf9

Syntax fr compression frf9

undo fr compression

View Subinterface (point-to-point) view

Parameter None

Description Use the fr compression frf9 command to enable FRF9 compression function.

Use the undo fr compression command to disable FRF9 compression function.

By default, frame relay compression function is disabled.

The system supports FRF.9 stac compression function, which groups messages into control messages and data messages. An control message is used for state negotiation between the two sides that have compression protocol enabled of a DLCI connection. FRF.9 data messages are exchanged only after the negotiation succeeds. The negotiation fails if the number of FRF.9 control messages sent exceeds. In this case, compression configuration cannot take effect.

Frame relay main interface is point-to-multipoint, but the subinterface includes two types: point-to-point and point-to-multipoint. Frame relay FRF.9 compression configuration differs depends on different types of interfaces. For a point-to-point frame relay subinterface, just use the fr compression frf9 command to configure on the subinterface view and FRF.9 compression function is enabled. For a point-to-multipoint frame relay interface or subinterface, whether to perform FRF.9 compression is determined by the configuration to create static address mapping. Refer to “fr map ip” on page 396.

This command is only valid for data messages and IARP messages but not LMI messages.

Only when the frame relay packets type of the interface is IETF, can frame relay compression take effect. When this command is configured, the system will automatically change the packet type of the interface into IETF if the frame relay packets type of an interface is not IETF.

Example # Enable frame relay compression on the point-to-point frame relay subinterface Serial 2/1.1.

<Sysname> system-view

[Sysname] interface serial 2/1.1 p2p

[Sysname-Serial2/1.1] fr compression frf9

fr compression iphc

Syntax fr compression iphc