im wodering how to test CIR EIR between two localization? we have direct link between these locations and I got a question about CIR EIR

How can I test/calculate it?

  • Care to share more info on your setup? Is it feasible to have a PC/server at each location with iperf or a similar tool? Sep 5, 2018 at 13:46
  • Yes we can do iPerf.
    – mrnobody
    Sep 5, 2018 at 14:10

1 Answer 1


With iperf you can easily test CIR between locations.

Obviosly you need to use adeqately sized machines (enough CPU, correct ethernet interfaces size, etc.) for your link (expecially if its a >1Gbps link).

For realistic results, you should use an adequate packet size (depending on the MTU of your link) and leave it running for a couple of minutes saturating the link. This should give you a pretty close CIR measurement.

As for EIR, you can try with many iperf tests of short time (see the -t flag) with big payload (-n flag) and see if peak transfer rate differs enough from the mean rate calculated before.

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