Specifications

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Chapter 2 Cisco IGX 8400 Series Cards
Universal Router Module
The following differences between the two operating systems can impact connection setup:
• Switch software CLI uses cells per second (cps) as the unit of measure for specifying traffic
parameters; Cisco IOS software uses kilobytes per second (kbps).
• Switch software and Cisco IOS software use different default values for traffic parameters.
• URM system software and Cisco IOS software do not handle UBR connections in the same way.
• Cisco IOS software limits the number of ABR connections to 100.
Cisco IGX allows a UNI specified range of 0 to 65535. However, the embedded router has a VCI range
of 0 to 1023, so you cannot terminate connections with a VCI value greater than 1023 on the URM. The
ATM PVCs configured onto the embedded router must correspond to the WAN connections configured
onto the embedded UXM-E. If the two sides of a connection are inconsistent, try checking the traffic
parameter values for each side to see if they are different, then redefine each value so that they are
consistent.
Note The PVC with the address vpi.vci 0.1023 on the URM internal ATM port is reserved and is not
available to the user.
Step 15 Save configuration changes to the embedded router NVRAM using the Cisco IOS copy run start
command.
Step 16 If you have not already done so, reconfigure the embedded router to load the Cisco IOS configuration
from NVRAM in the future using the switch software cnfrtr slot r command at the switch software CLI.
Tip After you have configured the embedded router, set up an external TFTP server to back up your
Cisco IOS configuration. Use the Cisco IOS copy nvram tftp://host address/destination file command
to copy the Cisco IOS configuration to the TFTP server.
For more information about switch software and Cisco IOS commands used on the IGX, see the “WAN
Switch Software for the URM” section on page 2-102 and the “Cisco IOS Software Commands for the
URM” section on page 2-103.
Initial URM Configuration Using RRC
If you have access to a TFTP server and want to configure the URM remotely, use the following
procedure:
Step 1 Write an initial Cisco IOS configuration, and store it on a TFTP server as an ASCII text file. The
Cisco IOS configuration file cannot exceed 256 kb in size, and the filename cannot exceed 32 characters
in length.
Timesaver In order to access the URM for further configuration, your initial Cisco IOS configuration file should
configure Telnet access to the embedded router, either through the FastEthernet interfaces on the back
card or through the internal ATM port.