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Troubleshooting Central Switch Templates "invalid input"

Overview

When working with Central Switch Templates to manage Aruba switches from the cloud, the "invalid input" can be difficult to pin down at times.


STT failed changes.png

 

Click the Failed link, and then View Config Difference

STT config diff.png

 

You can see the same information from the CLI with

show logging -r

The error is very unhelpful: 

line 379. Invalid input: disable

All the more so since the line numbers in the config do not line up with the line numbers in the template, and there is no straightforward way of working out which line it actually applies to.

STT line number mismatch.png

 

Adding Phony Lines

To help work out exactly where the problem is located, I add phony lines into the config template

STT line376.png

 

and rerun the config sync (from the switch CLI)

activate provision force

Finding the Culprit

Several iterations, perhaps with a few phony entries, may be required to identify the problem line.

This is the Config Difference output:

Recent log events from the device (20)
<12>Nov 14 12:55:10 - 00158 update: AM1: line 386. Invalid input: line377
<12>Nov 14 12:55:09 - 00158 update: AM1: line 380. Invalid input: disable
<12>Nov 14 12:55:09 - 00158 update: AM1: line 374. Invalid input: line370

In this example, there are two %variables% included between the markers; they may include the problem.

STT multiple phony lines.png
Download the variable file, and search for the problem statement ("disable" in this case).

 

STT download variables.png

 

Found it!STT variable _sys_oobm_command.png

 

The command should be

no ipv6 enable

(I made that change when fiddling with the variable file previously, so it looks like this variable file was not overwritten when the current config was imported from the switch.)

 

Modify the entry, change the modified column to Y, and upload the variable file to the group Central.

 

After a successful upload, the display may not refresh to show the changes. Go to another screen and come back to ensure the correct data is shown.
STT fixed variable.png
Remove the phony lines and rerun the config sync from the switch CLI ("activate provision force")

 

 

Check the Configuration Audit tab: success!
STT no errors.pngOther Notes
Changes made to the template should push out automatically once the template is updated. "activate provision force" seemed to be required only when there was a problem.

 



Richard Litchfield, HPE Aruba
Consulting System Engineer
Network Ambassador
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