Specifications

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Chapter 8 Cisco IGX 8400 Series ATM Service
ATM Service Provisioning on the IGX
Calculating and Managing Bandwidth
Total bandwidth for the port is specified by the line characteristics (see “Cisco IGX 8400 Series Cards”
and Appendix A, “General IGX 8410 Switch Specifications” in the Cisco IGX 8400 Series Installation
Guide). However, this total bandwidth can be used to support many different features, and can be
multiplexed with other ports to provide larger throughputs (see the “IMA on the IGX” section on
page 4-5).
Tip When calculating and managing bandwidth in an ATM network, consider the bandwidth requirements
for all features being implemented in the network to avoid oversubscription.
Connection admission control (CAC) limits the total bandwidth of all connections configured on a port
to the port capacity.
For more information on optimizing network traffic, see the “Planning Bandwidth Usage” section on
page 4-6.
Setting Up an ATM Connection
Before setting up an ATM connection, you must configure the node, trunks, and the line to be used for
the ATM connection. For information on configuring the node, see “Cisco IGX 8400 Series Nodes”. For
information on configuring a trunk, see “Cisco IGX 8400 Series Trunks”. For information on
configuring the line, see “Cisco IGX 8400 Series Lines”.
To set up an ATM connection, use the following procedure:
Step 1 Confirm that the line has been activated with the switch software dsplns command.
Step 2 Activate the ATM port with the switch software upport command.
Tip The URM requires execution of the switch software addport command to activate the internal ATM port
located between the embedded UXM-E and the embedded router. For more information on configuration
procedures specific to the URM, see the “URM Configuration” section on page 2-93.
Step 3 Configure the ATM port with the desired characteristics with the switch software cnfport command.
Step 4 Display the queue depth and queue thresholds for all four egress queues (CBR, NRT-VBR, RT-VBR,
ABR) with the switch software dspportq command.
Step 5 (Optional) Configure the port queue parameters with the switch software cnfportq command.
Step 6 Log in to the node on the remote end of the connection with the switch software vt command.
Step 7 At the remote node, repeat Step 1 through 5.
Step 8 Display the available connection classes with the switch software dspcls command. If a suitable
connection class is already configured, note down its number for use with the addcon command in
Step 9.