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Frame Relay Map Class Commands

XSR CLI Reference Guide 9-99

frame-relay fragment

ThiscommandspecifiestheFRF.12end‐to‐endfragmentsizeforaFrameRelaymap‐class.

Fragmentsizeisdefinedinbytes.Itspecifiesthenumberofpayloadbytesfromtheoriginalframe

thatwillgointoeachfragment.Thetransmittedfragmentwillincludeeightadditionalbytesfrom

headers(6)and

CRC(2).

Syntax

frame-relay fragment bytes

Syntax of the “no” Form

ThenocommanddisablesFRF.12end‐to‐endfragmentation:

no frame-relay fragment

Mode

MapClassconfiguration:XSR(config-map-class)#

Default

Fragmentationisdisabled

Example

Thefollowingexamplecreatesthemapclassslowlinkwithfragmentationsetat53bytes:

XSR(config)#map-class frame-relay slowlink

XSR(config-map-class<slowlink>)#frame-relay fragment 53

XSR(config-map-class<slowlink>)#service-policy frf12

map-class frame-relay

ThecommandselectsasupportedFrameRelaymapclassandgivesitamnemonicnamethatcan

bereferencedinFrameRelayconfiguration.

Map-class frame-relaystartsconfigurationofamap‐classprofilewithauser‐specificname.

Whenamap‐classcommandisentered,theCLIentersMap‐Classconfigurationmode,changing

theCLIpromptto

config-map-classwhereyoucanentermap‐classspecificvalues.

Syntax

map-class [frame-relay | dialer] map-class-name

Note: For proper operation of fragmentation, QOS is required to classify a service-policy which will

define a high priority queue. The queue must send frames no larger than the fragment size or

fragmentation will also be applied to high priority queue data and latency will grow, defeating the

primary purpose of FRF.12 fragmentation.

bytes

Sizeofframetopassunfragmented.

frame-relay

SetsaFrameRelaymapclass.

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