Howdy, netbooters everywhere.
I am testing now with 5 clients (pcp3.20beta5) and a Raspbian Lite
server. I'm trying to boot all 5 at once, with mixed results. Here is
what I can report for now:
- It looks like Pi 3 clients send discovery packets as soon as they
have powered up, so if they are behind a switch that takes its time
booting, like learning network topology for STP, then the packets are
lost and the Pis stay put for a while. Don't know how long, it is not
my test case. The solution seems to be configuring the switch to
"fast-open" some ports to let the traffic go through.
- My Pis wear Justboom amp HATs, for the moment I use two 24V PSUs,
one 18V, one 12V and one 5V "official" Pi 3 PSU. I *think* that if the
Pis are not totally powered down when they regain power, they don't
boot so well. I have 1 of the Pis on nylon stand-offs, the 4 others on
brass standoffs, no difference. The one with the "official PSU" is
powered via µ-USB, the others via the DC barrel connector on the amp,
no difference.
- I am testing with 2 switches on the path: one giga integrated to a
router, another next to the clients. For this one I test mainly with
an old no-name fast switch: boot is not consistent, and sync sometimes
suffers. I've also tested with a brand new Netgear GS108T v2: sync
seems flawless, boot better but not perfect.
- The setup I used initially (described above) was to automount a bind
mount between /exports and /tftp. I found out the mounts would expire
or not come up at the appropriate time, so I have replaced that with
symbolic link. This clearly improved the boot success rate.
- I *suspect* that the discovery protocol of LMS might cause some
players to stall during boot. I have anecdotal evidence players boot
better (if not perfect?) with LMS stopped. Supposedly broadcasts can
stop a Pi from TFTP-booting, if you have more info on that I'm
interested.
3 SB 3 Libratone Loop, Zipp Mini iPeng (iPhone + iPad) LMS 7.9
(linux) with plugins: CD Player, WaveInput, Triode's BBC iPlayer by bpa
IRBlaster by Gwendesign (Felix) Server Power Control by Gordon
Harris Smart Mix, Music Walk With Me, What Was That Tune? by Michael
Herger PowerSave by Jason Holtzapple Song Info, Song Lyrics by
Erland Isaksson AirPlay Bridge by philippe_44 WeatherTime by Martin
Rehfeld Auto Dim Display, SaverSwitcher, ContextMenu by Peter Watkins.
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