Check Bandwidth

published Last Updated: Oct 9, 2026 HW: all

check-bandwidth check bandwidth

iPerf (and its newer version, iPerf3) is a network testing tool that measures how much data can flow between two computers - in other words, it measures bandwidth and network performance.

iPerf runs in two parts:

• Server: Listens for traffic. (iperf.he.net, Other public servers are here)
• Client: Sends traffic to the server.

Confirm that you have the right interface if multiple are present.

$ iperf3 -c iperf.he.net -B <ip address of interface>

Connecting to host iperf.he.net, port 5201

[  5] local 192.168.217.28 port 45754 connected to 216.218.207.42 port 5201

[ ID] Interval           Transfer     Bitrate         Retr  Cwnd

...

[  5]   8.00-9.00   sec  76.2 MBytes   640 Mbits/sec   10    402 KBytes

- - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval           Transfer     Bitrate         Retr

[  5]   0.00-10.00  sec   614 MBytes   515 Mbits/sec  198             sender

[  5]   0.00-10.02  sec   611 MBytes   511 Mbits/sec                  receiver

You want sender and receiver to be close to see packet loss.

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Topic history

1. 2026-10-07 Susan Minne Bulk/mechanical change
   Replace individual guide ownership with system technical contacts
   Commit dca5a1a
2. 2026-09-24 Susan Minne Bulk/mechanical change
   chore: backfill asset and dock owner identities
   Commit c82f87b
3. 2026-09-23 Susan Minne Bulk/mechanical change
   docs: remove obsolete Confluence metadata
   Commit 2d5374e
4. 2026-09-13 Susan Minne Bulk/mechanical change
   feat: add MX approval metadata to topics
   Commit 406a785

Baseline import

Initial import into service_docs

Imported by Susan Minne on 2026-06-08

Move migrated topics into correct sections

Commit 599b402

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