Device check-sync - what is that hash code

[jaswredd]

Hi team,

When I check devices check-sync, one of the devices show the following. Please let me know what is “got” and “expected” ? what does that hash code represent?. Thank you.

[snovello · Accepted solution]

Hi,

in a Netconf device every change to the configuration will generate a new configuration version. So NSO can check if its sync with a netconf device by comparing version numbers.

For a CLI device and this is an IOS device using the IOS  CLI NED, NSO has to emulate that functionality in the NED. There are different mechanisms that can be configured in the NED, for example using the last change timestamp, but the default method in the IOS NED is to simply compute a hash of the config, so depending on the NED settings these numbers could be difffernt things, but most probably what you are seeing here is an MD5 hash of the configuration as returned from 'show run' (after stripping out any items from the show run response that change e.g dates).

[rogaglia]

Hi,

You can always run "compare-config" to check the actual differences:

$devices device X compare-config

Roque