Configure Frame Relay 257

Perform the following configurations in interface view.

Table 296 Configure Frame Relay Compression on multipoint interface

Operation

Command

 

 

Create a Frame Relay map, and enable Frame Relay

fr map { ip ipx }

compression on the DLCI

protocol-address dlci dlci

 

compression frf9

 

 

Delete the Frame Relay map, and disable Frame

undo fr map { ip ipx }

Relay compression

protocol-address dlci dlci

 

 

By default, Frame Relay payload compression is disable.

On the 3Com Router, both the Frame Relay main interfaces and sub-interfaces can be multipoint interfaces.

Enable/Disable TCP/IP Frame Relay supports TCP/IP header compression. Only when the packet format of Header Compression on Frame Relay interface is nonstandard, can TCP/IP header compression be

Interfaces executed. TCP/IP header compression can be designated both on the interface and on configuring static address mapping.

Perform the following task in synchronous interface view.

Table 297 Enable/Disable TCP/IP Header Compression on Interfaces

Operation

Command

 

 

Enable TCP/IP Header Compression on Interfaces

fr compression vj [ passive ]

 

 

Disable TCP/IP Header Compression on Interfaces

undo fr compression vj

 

 

By default, interfaces use initiative compression.

Configure Frame Relay

Fragment (FRF.12)

1Configure Frame Relay Fragment Attributes

When voice and data are transmitted concurrently, transmission of a large data packet will occupy the bandwidth for a relatively long time. This will cause delay and even drop of voice packets behind it, and hence degrade the voice quality. The purpose of configuring Frame Relay fragmentation is to shorten voice delay and ensure real-time voice transmission. After configuring fragmentation, large packets will be fragmented into small data fragments. These smaller and less delay-causing data fragments and the voice packets are interspersed for transmission to ensure an even flow of voice packets into the networks.

Table 298 Configure Frame Relay Fragment

Operation

Command

 

 

Create a Frame Relay class

fr class class-name

 

 

Delete a Frame Relay class

undo fr class class-name

 

 

Configure the Frame Relay fragment size

fragment fragment-size {

 

data-level voice-level }

 

 

Disable Frame Relay fragmentation

undo fragment [ fragment-size{

 

data-level voice-level } ]

 

 

Associate a Frame Relay class with a Frame

fr-classclass-name

Relay interface or PVC

 

 

 

Page 261
Image 261
3Com 10014299 manual By default, interfaces use initiative compression, Configure Frame Relay Fragment FRF.12