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 9 Switch Operating Procedures
Managing IMA
Step 4 To display the autorestart feature configuration for a specific IMA group, enter the dspimagrp command
as described in the “Displaying the Status of a Single IMA Group” section, which appears earlier in this
chapter. For more information on autorestart information in the dspimagrp command display, see
Displaying the IMA Group Autorestart Configuration and State” section, which appears later in this
chapter.
Step 5 To configure the autorestart feature for a specific IMA group, enter the cnfimagrp command using the
following format:
M8830_CH.1.PXM.a > cnfimagrp -grp <group> [-mode <autoRestart>] [-rxid <rxImaIdExpected>]
Replace the group variable with the IMA group number as it appears in the dspimagrp and dspimgrps
command displays.
Include the -mode option when you need to change the autorestart mode for the group. Replace the
autoRestart variable with 1 to disable autorestart for this group, 2 to enable autorestart and relearn the
far end ID on restart, and 3 to enable autorestart and reuse the previously learned far end ID on restart.
The -rxid parameter is optional and specifies the far end IMA ID to expect on autorestart. If a far end ID
is or will be configured on the IMA group (using cnfimgrp -txid option on MGX switches), enter this
ID with the -rxid option on the near end to help the switch determine whether an IMA group link is in
loopback.
Be sure to specify an IMA far end ID that is different from the near end ID. The range is -1 to 255. Enter
the -rxid option with -1 to configure the IMA group to learn the far end user ID when the IMA group
starts.
Cisco recommends two configurations for the autorestart feature. The preferred configuration is to set
the -mode option to reuse (3) the far end ID and set the -rxid option to -1. This configuration causes the
IMA group to learn the far end ID the first time the IMA group starts and reuse that IMA group ID on
all future restarts.
The second configuration sets the -mode option to relearn (2) the far end ID and sets the -rxid option to
-1. This configuration causes the IMA group to learn the far end ID every time the IMA group starts. To
make the far end ID persistent after it is learned, you must enter the cnfimagrp command a second time
and change the -mode option to 3 (reuse).
The following example configures IMA group 2.1 to use the preferred configuration:
M8830_CH.1.PXM.a > cnfimagrp -grp 2.1 -mode 3 -rxid -1
Note The cnfimagrp command provides additional parameters. All cnfimagrp parameters are described in
Table 3-5.
Step 6 To verify an IMA group configuration change, enter the dspimagrp command.
Displaying the IMA Group Autorestart Configuration and State
Starting with Release 5, three new rows have been added to the dspimagrp <group> command to show
the autorestart state for an IMA group. To display an IMA group autorestart state, enter the dspimagrp
command as described in the “Displaying the Status of a Single IMA Group” section, which appears
earlier in this chapter. The following rows apply to the autorestart feature:
Auto-Restart Mode : disable
Rx IMA ID Expected : -1
Auto-Restart Sync State : disable