Using the sleep command on Cisco NX-OS to correlate log file events

Inserting a set amount of time by using the sleep XX statement between commands, can help to correlate multiple events in a log file by measuring the exact time between logged events.

Inserting a 5 second delay between commands on Cisco NX-OS:

nx7k-MPLS(config-if)# shut ; sleep 5 ; no shut

There was exactly 5 seconds between shutting and no-shutting an interface which helps to confirm the withdrawal and adding of routes in the IS-IS logs below:

2020 Apr 25 12:56:55.886160 isis isis-config [22629]: [1677]: Delete direct prefix on loopback0 for L2 MT-0 Transition:None
2020 Apr 25 12:57:00.913744 isis isis-config [22629]: [1677]: Add direct prefix on loopback0 for L2 MT-0 metric 10 Transition:None

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