[App_rpt-users] RTCM Inbound (Eth Rx) packet out of bounds

[Tim Sawyer]

Jesse,

I'm curious about your Note: in the email below. I get a lot of there
messages "Voter lost master timing source!!" Do you think the two RTCM
solution you mentioned would fit that?

messages:[Nov  9 07:59:28] NOTICE[28554] chan_voter.c: Voter lost master
timing source!!

messages:[Nov 24 17:58:49] NOTICE[28554] chan_voter.c: Voter lost master
timing source!!

messages:[Nov 25 03:58:49] NOTICE[28554] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct  4 13:00:06] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct  4 14:37:07] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct  6 17:00:05] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct  7 17:00:54] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct 13 01:00:06] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct 22 07:00:05] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct 22 15:00:06] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct 25 13:00:04] NOTICE[28554] chan_voter.c: Voter lost master
timing source!!

messages.1:[Oct 28 14:59:57] NOTICE[28554] chan_voter.c: Voter lost master
timing source!!

messages.2:[Sep 17 17:00:05] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.2:[Sep 17 19:00:06] NOTICE[23633] chan_voter.c: Voter lost master
timing source!!

messages.3:[Aug 15 07:00:06] NOTICE[713] chan_voter.c: Voter lost master
timing source!!

messages.3:[Aug 17 03:00:05] NOTICE[713] chan_voter.c: Voter lost master
timing source!!

messages.3:[Aug 21 15:00:06] NOTICE[713] chan_voter.c: Voter lost master
timing source!!

messages.3:[Aug 21 19:00:05] NOTICE[713] chan_voter.c: Voter lost master
timing source!!

messages.3:[Aug 30 15:00:05] NOTICE[713] chan_voter.c: Voter lost master
timing source!!



On Sat, Sep 23, 2017 at 7:46 PM, Jesse Lloyd <ve7lyd at gmail.com> wrote:

> Here's how I do it, seems to work...
>
> Calculate the maximum latency in network. If its less than 60 ms use 60ms for the calculations.
>
> For RTCM Tx Buffer length, take latency * 8. Minimum therefore is 480 (this value is in packets (8 packets per ms))
>
> For buflen in voter.conf, take latency + 100. Minimum therefore is 160 (this value is in ms)
>
> The delay of the system is RTCM Tx Buffer Length /8 + tx buffer length in Asterisk. Minimum therefore is 220ms
>
> If you have voter.conf set to 250 the RTCM should be set to 1200. This should make the system able to handle latency spikes to 150ms.
>
> Note: If your GPS is weak on the RTCM which is connected to your Asterisk
> server it'll cause lots of problems. I've also had better luck using a
> dedicated RTCM for the server timing and using a different one for the
> radio/repeater, even if they are in the same building. I suspect the UDP TX
> audio stream combined with the 10Mbps 1/2 duplex RTCM ethernet causes
> packet collisions which messes up the server timing packets (this is a
> hunch at this point).
>
> Cheers,
> Jesse
>
> On Sep 23, 2017, at 5:41 PM, Hayden Honeywood <haydenph91 at gmail.com>
> wrote:
>
> More testing last night and today.
>
> I set the TX Buffer to 1200 last night, rebooted both RTCM units and it
> was working fine last night.
>
> Switched off one of the sites (at home) overnight. Came back this morning,
> powered up and getting the packet out of bounds issues again. Changed up to
> 1600 and rebooted both units, worked again. buflen set to 250.
>
> Is it just a matter of increasing these up and up until it's stable even
> after a power reset?
>
> I've been swapping out ethernet cables too just checking to make sure that
> is not the issue... Could still be a hardware problem. Next thing to change
> is the port from 667 to make sure there is no limiting down at the ISP
> level.
>
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-- 
--
Tim
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