what is last input and output logs of interface ,can you any one expla

[krahulbgp]

what is last input and output logs of interface ,can you any one explain in deep

[Mark Elsen]

 - The last input is the number of hours(00), minutes(00), and seconds(03) since the last packet was successfully received by an interface. This is useful for determining when a dead interface. The last output is the number of hours (00), minutes (01), and seconds (08) since the last packet was successfully transmitted by an interface. This is useful for determining when a dead interface failed. The output hang is the number of hours, minutes, and seconds (or never) since the interface was last reset because of a transmission that took too long.)

 M.

[Giuseppe Larosa]

Hello @krahulbgp ,

be aware that in some platforms these parameters are not meaningful and they can state no input or output for long time even if traffic is present.

I have seen this on some multilayer switches.

Hope to help

Giuseppe

[MHM Cisco World]

We use this to check how long this interface is UP and forward data traffic (not mgmt traffic).

When interface forward traffic first time it start count time.

That it 

Note:- if the interface is flapping this count is reset to zero

MHM