IBM SC30-3681-08 manual Change permanent-virtual-circuit command

Con®guring Frame Relay Interfaces

notify-fecn-source

no-pvc

orphan-circuits

protocol-broadcast

switched-virtual-circuits

throttle-transmit-on-fecn

cir-monitor

Enables the circuit monitoring feature. The circuit monitoring feature

ensures that the circuit's information rate varies between the minimum

information rate and the maximum information rate, calculated using the

parameters con®gured with theadd permanent-virtual-circuitcommand or

the change permanent-virtual-circuit command

Note: The circuit monitoring feature overrides the congestion monitoring

feature if there is a con¯ict when both are enabled. The default

setting for this feature is disabled.

For additional information on CIR monitoring, see ªCIR Monitoringº on

page 399 .

Note: To maximize throughput for circuits running data compression, you

should not enable CIR monitoring on the same interface on which

you have enabled compression. Because the device uses the

uncompressed size of frames to determine if the VIR of a PVC is

being exceeded and compressed frames will require less bandwidth,

the CIR of a PVC will be under-utilized if the device strictly monitors

and does not exceed the con®gured CIR. Instead, congestion

monitoring can be used to allow the device to react to congestion

indications sent by the FR network to avoid frame loss.

cllm Enables the device to throttle down in response to a CLLM message.

Contact your FR network provider to see whether this support is available.

See ªCircuit Congestionº on page 399 for more information.

compression

Enables compression on the interface. All compression-capable VCs on the

interface can compress data packets, provided that contexts are available

and the active compression circuit limit has not been exceeded. (See Using

the Data Compression Subsystem in Using and Con®guring Featuresfor

details.)

Note: To maximize throughput for circuits running data compression, you

should not enable CIR monitoring on the same interface on which

you have enabled compression. Because the device uses the

uncompressed size of frames to determine if the VIR of a VC is

being exceeded and compressed frames will require less bandwidth,

the CIR of a VC will be under-utilized if the device strictly monitors

and does not exceed the con®gured CIR. Instead, congestion

monitoring can be used to allow the device to react to congestion

indications sent by the FR network to avoid frame loss.

416MRS V3.2 Software User's Guide