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bandwidth, cir and mincir in FR?

What is the difference among the three in frame-relay configuration? How to properly configure the three? And what are the default values if they are not manually configured? Thanks.

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Cisco Employee

Re: bandwidth, cir and mincir in FR?

Bandwidth is the number used in the computation for routing protocols that have badnwidth as one of the variables.

CIR would reference the burst rate speed that you have purchased from the telco.

MinCir represents the lowest amount of bandwidth that you are alloted and this is usually called the CIR to the telco but for the router, this is AKA mincir.

Following is how to config for a 32k CIR and 64K burst:

Router#config t

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#map-class frame-relay cisco

Router(config-map-class)#frame-relay mincir 32000

Router(config-map-class)#frame-relay cir 64000

Router(config-map-class)#exit

Router(config)#exit

Router#

02:30:43: %SYS-5-CONFIG_I: Configured from console by consoleconfig t

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#interface s0

Router(config-if)#bandwidth ?

<1-10000000> Bandwidth in kilobits

Router(config-if)#bandwidth 64

Router(config-if)#encapsulation frame-relay

Router(config-if)#frame-relay class cisco

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