Specifications

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Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 3 Provisioning PXM1E Communication Links
General PXM1E Configuration Procedures
Each combination of multiple links is called an IMA group. IMA groups are comprised of IMA links.
Note During PXM1E-16-T1E1 switchovers, traffic loss on an IMA group can be around 3 seconds, and
connections on the IMA group may be re-routed.
Configuring IMA ports on PXM1E cards is a three-step process.
1. Create and configure an IMA group
2. Add IMA links to the IMA group
3. Add and configure an IMA port for the IMA group
The sections that follow provide detailed procedures for configuring IMA on PXM1E-16-T1E1 ports.
Creating an IMA Group
Note Both ends of an IMA connection must support IMA, and the IMA configuration must match on both
ends.
To create an IMA group, use the following procedure:
Step 1 Establish a configuration session with the active PXM1E.
Step 2 Enter the dsplns command to display all configured lines on the current card.
MGXswitch.7.PXM.a > dsplns
Line Line Line Line Length Valid Alarm
Num State Type Lpbk (meters) Intvls State
---- ----- --------- ----------- -------- ---------- -------
2.1 Up dsx1ESF NoLoop 40 89 Critical
2.2 Down dsx1ESF NoLoop 40 0 Clear
2.3 Down dsx1ESF NoLoop 40 0 Clear
2.4 Down dsx1ESF NoLoop 40 0 Clear
2.5 Down dsx1ESF NoLoop 40 0 Clear
2.6 Down dsx1ESF NoLoop 40 0 Clear
2.7 Down dsx1ESF NoLoop 40 0 Clear
2.8 Down dsx1ESF NoLoop 40 0 Clear
2.9 Down dsx1ESF NoLoop 40 0 Clear
2.10 Down dsx1ESF NoLoop 40 0 Clear
2.11 Down dsx1ESF NoLoop 40 0 Clear
2.12 Down dsx1ESF NoLoop 40 0 Clear
2.13 Down dsx1ESF NoLoop 40 0 Clear
2.14 Down dsx1ESF NoLoop 40 0 Clear
2.15 Down dsx1ESF NoLoop 40 0 Clear
2.16 Down dsx1ESF NoLoop 40 0 Clear
Note If a line you want to add to the IMA group is up, enter the dnln <x.line> command to bring that
line down. A line must be down before you add it to an IMA group.
Step 3 Enter the addimagrp command to create the IMA group, as shown in the following example:
MGXswitch.7.PXM.a > addimagrp <group> <version> <minLinks> <txImaId> <txFrameLen>
<txclkMode> <diffDelayMax>
Table 3-4 describes the parameters for the addimagrp command.