what's the differece between the CIR and MINCIR in Frame_Relay?

[kon...@rocketmail.com]

what's the differece between the CIR and MINCIR in Frame_Relay?

kck

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[Brad Reese]

Hi,

CIR: Short for committed information rate, a specified amount of
guaranteed bandwidth (measured in bits per second) on a Frame Relay
service. Typically, when purchasing a Frame Relay service, a company can
specify the CIR level they wish. The Frame Relay network vendor
guarantees that frames not exceeding this level will be delivered. It's
possible that additional traffic may also be delivered, but it's not
guaranteed.

Some Frame Relay vendors offer inexpensive services with a CIR equal to
zero. This essentially means that the network will deliver as many
frames as it can, but it doesn't guarantee any bandwidth level.
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frame-relay mincir
To specify the minimum acceptable incoming or outgoing committed
information rate (CIR) for a Frame Relay virtual circuit, use the
frame-relay mincir map-class configuration command. To reset the minimum
acceptable CIR to the default, use the no form of this command.

frame-relay mincir {in | out} bps
Syntax Description
in | out Incoming or outgoing.
bps Committed information rate, in bits per second. Default is 56000
bps.

Default
56000 bps

Command Mode
Map-class configuration

Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.

Rate values greater than 2048 must be entered with trailing zeros. For
example, 2048000 and 5120000.

The network uses the mincir value when allocating resources for the SVC.
If the mincir value cannot be supported, the call is cleared.

Example
The following example defines the peak and average traffic rate, the
minimum CIR, and the idle timer for the fast_vcs map class and applies
those values to DLCI 100, which is associated with that map class:

interface serial 0
frame-relay interface-dlci 100
class fast_vc
map-class frame-relay fast_vc
frame-relay traffic-rate 56000 128000
frame-relay idle-timer 30
frame-relay mincir out 48000

http://www.alliancedatacom.com/cisco-frame-relay-commands.htm

Hope this helps.

Brad Reese
Alliance Datacom Frame Relay, ATM & IP Resource Center
http://www.alliancedatacom.com/
11130 Petal Street, Suite 800
Dallas, Texas 75238
800-444-5851 Toll Free
214-503-7400 Office