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Report on Meshoween 2021 network test
Note - this report is written from a Southern California perspective. Depending on your location, as they say YMMV!
During the test the node count on the linked networks locally rose to around 1,090. N2MH's N2MH-Hub saw 1428, most likely a record for an AREDN network.
Observations:
As we hoped, network storms never appeared from our West Coast point of view, and none have been reported to date. Network traffic was not substantially higher than normal. Using KN6PLV's Mesh Monitor, messages per second were averaging about 600 before the test. During the test it hovered closer to 700. Most of the increase in traffic was due to OLSR routing broadcasts, which each node has to handle.
As we expected, older devices struggled. Many wound up with a load significantly greater than 1 (which is a full load for a single-CPU device like these), indicating their CPUs were struggling to keep up with their pending processes. Ssh'ing into a few of them and running top showed that with node counts around 1,000, loads of around 4-5 were seen.
Things we didn't expect:
While the slower nodes struggled with displaying UI pages, they were usually still able to pass traffic. But occasionally that older hardware bogged down so much that it couldn't. Perhaps some effort should be made to prioritize traffic handling...
Updated date: Sunday, October 31, 2021 - 15:17
Meshoween test results
We've wrapped up the Meshoween network abuse test :-).
If you participated and have any specific observations, please pass them along to me (orv.beach@gmail.com) and they'll be rolled them into the report on the test.
tl;dr - it went pretty well - a few surprises.
Updated date: Saturday, October 30, 2021 - 20:55
Network Test Saturday, October 30th
As an AREDN network grows in size and/or complexity, it will eventually encounter a packet storm that would pretty much cripple its traffic-carrying capabilities until the storm fades out, which could be hours. (The writers of the OLSR mobile routing protocol probably never envisioned it having to handle networks of the size amateurs are creating.) This is significantly limiting the growth and performance of our networks.
Recently released nightly build 571 provides a substantial amount of resistance to these storms. As a test of the network's robustness (or not) Saturday October 30th at 9 a.m. local we'll attempt to link as many AREDN networks together as possible.
We did a 'test test' earlier in the week on the West Coast when the Southern California and Bay area networks were linked. Node counts got up to a bit over 800 and few reports were received, so we're ready for Saturday!
Test preparation
Prior to Saturday's test, it's recommended that in order to protect your node(s) that you upgrade them to the latest nightly build (599 as of this writing). This is especially important on nodes that pass data through (as opposed to being an end-point on a network).
Also prior to Saturday, establish some baseline performance measurements on your network. Suggestions are:
- Quality of VOIP phone calls
- iperf throughput...
Updated date: Thursday, October 28, 2021 - 11:22
Meshoween is in a week!
Folks, next Saturday is Meshoween, where nasty packet storms strike terror into the most experienced ham network user :-)
Seriously, we'll be linking up big and small networks to see how our ham radio networks handle huge routing table broadcasts.
If you haven't yet updated your node(s) to nightly build 571 (or later), please seriously consider doing so. It will help your node fight off any scary packet storms!
Monitoring instructions will be promulgated a day or two prior to Meshoween.
Updated date: Saturday, October 23, 2021 - 17:31
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AREDN at Winterfest 2019
AREDN mesh networkers will be at the Winterfest 2019 in Vienna, VA on Sunday, March 24, 2019. The hamfst will be held at the Northern Virginia Community College Annandale Campus. Click here for directions.
A group led by Damon Schaefer K9CQB will be on hand to demonstrate equipment and answer your questions. Just look for the large AREDN banner at their table. His team plans to populate the booth with several masts bristling with equipment and 2 large monitors, one running an AREDN slideshow and one with a local mesh network for live demonstrations.
Stop by and say hello!
The indoor exhibit space can accommodate 100 vendors and there are 150 paved outside tailgate spaces. Click here for more information.Admission for everyone, vendors and the general public, begins at 6 AM, Sunday. The admission fee is $10. For table and tailgating spaces, see the...
AREDN in February 2019 QST
AREDN Mesh Tunnel via Satellite at Baker 2 Vegas 2018 by Oliver Dully, K6OLI appears in the February 2019 edition of QST. This article is a thorough discussion of setting up the communications system at this large annual event..
Oliver reports that the combination of AREDN mesh and Cell On Wheels (COW) trailers set a positive precedent for the future of disaster communications and the Amateur Radio Emergency Data Network.
The full article may be viewed here.
Reprinted with permission, February 2019 QST; copyright ARRL.
QST is a publication of the ARRL: the national association for Amateur Radio™
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