Is there a way to check the current interface output/input rate on Cisco devices? the interface statistics only give the average over 5 minutes, and monitoring the interface seems to have a very long lag (as it also only shows the updated value over 5 minutes).

When I do a show interface on a Juniper device, it gives the current input/output rate.. is there a way to do this on a Cisco device?

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    – Ron Maupin
    Aug 6, 2017 at 23:56

1 Answer 1


An I/O rate must be over some time period since it is a number of bits per time period, just like your speed in a car is an average of the number of miles per hour. The Cisco device can change the time period for the average of a particular interface with the interface command, load-interval.

Your Juniper has to have a time period over which it averages the number of bits. It may be a one second time period, but you can't get bits per second unless you count the over a one second (or longer) time period.

Normally, you do want an I/O rate averaged over a time period longer than 1 second since it smooths out bursts and gives you a more accurate picture of throughput on an interface.

  • How do I use the load-interval command to show it over a second? Oct 23, 2015 at 20:48
  • You can use the command to lower the interval. You could try 1 second, but, I believe, the minimum is 30 seconds. A one second interval really isn't useful information. Are you sure the Juniper uses a one second interval?
    – Ron Maupin
    Oct 23, 2015 at 20:59
  • 30s is as low as it goes.
    – Ricky
    Oct 23, 2015 at 21:55
  • Well.. as soon as I start passing traffic, the Juniper device shows the exact rate of traffic I am sending (In the show interfaces command).. It is very close to real time. The Cisco device on the other hand.. I have to wait around 7 minutes to get the exact amount of traffic being sent Oct 24, 2015 at 21:27
  • Cisco also shows current traffic, but it is over a time period. For instance, if I set it to 30 seconds, all traffic from the last 30 seconds, including the traffic which pass as I was typing the command are included. The Juniper also gives you the same sort of thing, but I don't know over what time period it uses. I'm not sure what you are trying to get.
    – Ron Maupin
    Oct 24, 2015 at 21:32

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