Installation guide

3-14
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 3 Installing the IGX
Setting Up a UXM-E
Adding Links to an IMA Feeder Group
To add links to an IMA group, you can use either Cisco WAN Manager or the CLI. To add a link to an
IMA on the CLI:
Step 1 Find the nodes configured as trunks connected to the IMA feeder:
dsptrks
Step 2 Increase the IMA group members on both trunk and feeder nodes by manually entering the number of
group members. Enter:
cnftrk slot.primary link
Step 3 Increase the receive rate using the DS0 calculation on both trunk and feeder nodes.
Step 4 Increase the number of retained links on both trunk and feeder nodes.
Removing Links from an IMA Feeder Group
To remove links from an IMA group, you can use either Cisco WAN Manager or the CLI. To remove a
link from an IMA group on the CLI:
Step 1 Find the nodes configured as trunks connected to the IMA feeder by using the dsptrks command.
Step 2 Reduce the number of retained links on the IMA feeder node.
Step 3 Reduce the receive rate using the DS0 calculation on the IMA feeder node.
Step 4 Repeat Step 2 and Step 3 on the IMA trunk.
Step 5 Reduce the number of IMA group members on both trunk and feeder nodes by manually entering the
number of group members:
cnftrk slot.primary link
Note The primary link cannot be removed from an IMA group.
UXM-E Inverse Multiplexing ATM IMA Lines
This feature allows the extension of the IMA protocol to UXM-E line interfaces, which substantially
reduces equipment and interface costs for customers requiring IMA line interfaces and trunks and high
bandwidth demand for ATM. It reduces costs by bundling multiple physical T1/E1 lines into a logical
line enlarging traffic bandwidth. This makes it unnecessary to upgrade access lines to higher-speed
services such as T3/E3.
Note Both ends of the UXM-E IMA lines require you to install UXM-E Firmware Model B (Release 9.2 and
later releases). If the UXM IMA line is connected to another device, that device must support ATM
Forum Compliant IMA Protocol, Version 1.0. To verify the UXM firmware version, use the dspcd
command.