First of all, the post isn’t about explaining QoS. Configuring AutoQos on Cisco switches should be very easy. At least, that is what all the Cisco documentation tells you. I always thought that the statements about configuration AutoQos were true, but a few days ago I would disagree.
I was configuring multiple switches, Cisco Catalyst 2960-24PC-L switches to be more precise. The switches are configured with a default template, which is generated according the needs of the customer. I uploaded the most recent software into the switches, which is 12.2(55)SE. The customer is going to use an Avaya IP telephony environment, so I tried to apply the appropriate AutoQos command to an interface. After applying the command, I received the following error:
AutoQoS Error while generating commands on Gi0/2
The switches didn’t have any QoS configuration before applying the command. Searching multiple forums didn’t gave me a valid solution. I did my own research and found an incompatibility with the configuration mode exclusion command, like shown below:
configuration mode exclusive auto expire 500 lock-show config-wait 5 retry-wait 5
I removed the configuration mode exclusion command and the AutoQos commands can be implemented without errors. I tried to find why it isn’t possible to apply the AutoQos commands while the configuration mode exclusive command is enabled.
I guess the problem is that the configuration mode exclusive commands prevents other users or the auto-generation of commands to be executed. When applying the AutoQos commands, the commands are executed by the router / switch and not by the user who locked the cli.
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