Multichannel -- maximum number of outbound connections -- related to frames/period setting?

[Mike O'Connor]

lots of folks are starting to explore multichannel, and some of them are coming up with setups that require lots of channels into or out of a location.  i'm bumping into this puzzler as i work on setting them up.

sending more than 8 channels to a hub server with 512 frames/period fails, "waiting for peer" on the client end, "not receiving datagrams (timeout)" on the server end.  changing to 256 frames/period yields a max of 18 connections and so forth (see below). 

 

- is this due to a packet-size limitation, and thus normal or something else that just spoofed me into thinking that?  

- if my hypothesis is correct, is there a way to calculate this and trap it in an error message, with suggestions on what to do?  

- i just did a little brute-force testing that might yield some targets for such an error message:

512 frames/period - 8 outbound connections work

256 frames/period - 18 outbound connections work

128 frames/period - 35 outbound connections work

64 frames/period - 65 outbound connections work

the preceding were all done on an M1 Mac Mini.  the 2014 Intel Mac could only manage 63 connections 

PS:  is there a request in the queue to make the GUI scroll the (VERY cool) VU meters rather than making a window that's so tall that i can't get to the "disconnect" button.  ;-)

mike o'c

[Kenneth Fields]

hi mike,

did you try connecting with ipv6 address? 

I believe that MTU issues are handled differently with IPV6. curious to know.

I always use ipv6 when using jack trip. Is there a reason to use ipv4 ever again?

Ken

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[Mike O'Connor]

hi Ken,

sorry about taking so long to get back to you.  alas, i live in the US -- cradle of the internet and yet now home to the worlds most hopelessly backward ISPs.  my fiber-to-the-home connection (from a great rural coop - 1 gig symmetrical) is only delivered over IPv4.  cellular internet (newer infrastructure, different regulations) mostly runs over IPv6, so there's hope for the future.  but for now...  that's what we're fighting.

To view this discussion on the web visit https://groups.google.com/d/msgid/jacktrip-users/CCE98075-8133-4418-9418-99C1CE6BBE7E%40gmail.com.