How do I find out if a command is supported

[echan101]

Generic question that I'm sure would have been answered, but the old Cisco tools don't work any more.

How do I check which commands are supported on a particular hardware platform?

For instance before I buy the equipment, how can I check that a certain command is supported?

The feature search doesn't seem to go down to the command level.

[luis_cordova]

Hi @echan101,

I hope this link can help you:

https://www.cisco.com/c/en/us/products/index.html

Regards

[echan101]

No unfortunately this is not helpful.

Even if I check the configuration guides, it tells me a when a command was introduced, but it doesn't tell me which platform actually supports that command.

Any other ideas?

[Dennis Mink · Accepted solution]

typically if its an IOS device the IOS feature set defines what is available and whats not.  

use the feature navigator,  i wont tell you commands but will tell you features:

https://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/by-feature-technology.jsp

[echan101]

Unfortunately the feature navigator doesn't go down to the command level as you say. And individual commands may not be supported in the feature set.

[echan101]

I ended up asking the question through TAC since I had an active contract on the same platform. Their answer was that the command (ntp update-calendar) wasn't supported on ISR4000 series routers as there is no onboard hardware clock (calendar = hardware clock).

There was no way of finding this out using the documentation. The only way was to ask TAC (since trying it out on the router is not a definitive way of proving something doesn't work - i.e. there's a possibility it can only be configured in a certain mode, or it could be a bug). TAC also provides an authoritative response which is important when reporting findings to management.