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Configuring the Cisco NM-1A-T3/E3 Network Module
How to Configure the ATM T3/E3 Network Module
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Cisco IOS Release 12.4(15)T
The -pcr , -scr , and -mcr arguments are peak cell rate, sustainable cell rate, and guaranteed minimum cell
rate, respectively, in kbps. The -mbs argument is maximum burst size in number of cells.
The peak rate , average rate , and rate arguments are in kbps. The burst argument is in number of cells.
For ABR VCs, you can optionally configure the factor by which the cell transmission rate increases or
decreases in response to flow control information from the network or destination. To configure this
option, use the following command in interface-ATM-VC configuration mode:
Setting PVC Watermarks
The SAR, which is used by the ATM T3/E3 module, uses queues inside the SAR hardware. One queue
is used for each created PVC. To manage the latency, shaping, and throughput on the PVCs, use the
following command in interface-ATM-VC configuration mode:
Router(config-if-atm-vc)# vbr-rt peak-rate
average-rate burst
Example:
Router(config-if-atm-vc)# vbr-rt 10000 3000 64
Configures real-time VBR.
Router(config-if-atm-vc)# cbr rate
Example:
Router(config-if-atm-vc)# cbr 10000
Configures CBR.
Command Purpose
Command Purpose
Router(config-if-atm-vc)# atm abr rate-factor
[ rate-increase-factor ] [ rate-decrease-factor ]
Example:
Router(config-if-atm-vc)# atm abr rate-factor 32 32
Specifies the ABR rate factors. The default rate increase
factor is 16. The default rate decrease factor is 16.
Command Purpose
Router(config-if-atm-vc)# queue-depth <hwm> <lwm>
Example:
Router(config-if-atm-vc)# queue-depth 10 5
Sets the high watermark (hwm) and low watermark (lwm)
level for each created PVC.
When the number of ATM cells in the SAR queues reach the
high watermark level, the SAR stops processing the ATM
cells on that particular PVC. After the ATM cells drain to the
low watermark level, the SAR starts processing the ATM
cells again.