Cisco CX-AIP-TM Installation And Configuration Manual page 36

Configuring the AIP
Setting the MTU Size
To set the maximum transmission unit (MTU) size, use the following command:
where bytes is in the range of 64 through 9188 bytes; the default is 4470 bytes. (4470 bytes exactly
matches FDDI and HSSI interfaces for autonomous switching.)
The no form of the command restores the default:
Configuring SONET Framing
In STM-1 mode, the AIP sends idle cells for cell-rate decoupling. In STS-3C mode, the AIP sends
unassigned cells for cell-rate decoupling. The default SONET setting is STS-3C. To configure for
STM-1, use the following command:
To return to STS-3C, use the no atm sonet stm-1 command.
Configuring an ATM Interface for Local Loopback
To configure an ATM interface for local loopback (useful for checking that the AIP is working), use
the following command:
The no form of the command turns off loopback:
Setting the Reassembly Buffers
The atm rxbuff command sets the maximum number of reassemblies that the AIP can perform
simultaneously. The AIP allows up 512 simultaneous reassemblies; the default is 256. The no form
of the command restores the default.
Setting the Transmit Buffers
To set the number of transmit buffers for simultaneous fragmentation, use the following command:
where n is in the range 0 to 512. The default is 256.
The no form of the command restores the default:
Setting the Source of the Transmit Clock
By default, the AIP uses the recovered receive clock to provide transmit clocking. To specify that
the AIP generates the transmit clock internally for SONET, E3, and DS3 PLIM operation, use the
following command:
36 Asynchronous Transfer Mode Interface Processor (AIP) Installation and Configuration
Router(config-if)# mtu bytes
Router(config-if)# no mtu
Router(config-if)# atm sonet stm-1
Router(config-if)# loopback plim
Router(config-if)# no loopback plim
Router(config-if)# atm txbuff n
Router(config-if)# no atm txbuff
Router(config-if)# atm clock internal