[App_rpt-users] Strange RTCM Behavior

[Sam Nabkey]

I'm having similar issues with non voted units.  Latest firmware and latest
acid.

I've tried everything..



On Feb 27, 2015 2:11 PM, "Caleb Pal" <cleb at defcon-3.net> wrote:

> Tim,
>
> I have watched multiple "100" counts of voter pings, and they all come
> back shortly after they are sent, I don't see any shaping behavior. I've
> outlined the network arch below. Both RTCM buffers are at 2000, voter.conf
> @ 250.
>
> I ran another ping this morning:
>
> PING (West): Packets tx: 10000, rx: 10000, oos: 0, Avg.: 5.997 ms
> PING (West):  Worst: 17 ms, Best: 5 ms, 100.0% Packets successfully
> received (0.0% loss)
>
> The network:
>
> North RPT <-- UBNT 900MHz PtP --> RB-450G (IPSEC) <-- Fiber --> Cloud Core
> Router (IPSEC) <-- UBNT 5GHz PtP --> RB450G <-- Ethernet --> West RPT.
>
> The North site is on a 50/50 Fiber connection with no competing traffic.
> App_rpt lives on a server at the North site. West is 25/25 with QOS
> providing 5Mbps to any of the RTCM traffic. No routing hops between the
> fiber connections.
>
> The thing I find odd is that a restart of the RTCM temporarily fixes the
> issue.
>
> RTCM's are both S/W Version: 1.46 03/04/2014.
>
> Thanks,
>
> Caleb
>
> On 2/27/2015 0656, Tim Sawyer wrote:
>
>> Do the pings “wind up and pitch”… i.e., no immediate response then they
>> all come back in sorta of a batch? That would indicate traffic shaping on
>> the new network.
>>
>> The "packets out of bounds" message means the buffers are too small. Is
>> the RTCM buffer set at 2000 (250ms)?
>>
>> One thing you might try is to change the port. Port 667 is viewed as a
>> bad guy by some ISPs. I’ve been using port 2074 on problem systems.
>>
>>  On Feb 26, 2015, at 4:33 PM, Caleb Pal <cleb at defcon-3.net> wrote:
>>>
>>> Hello All,
>>>
>>> We have a two site Voted Simulcast consisting of 2 UHF Motorola
>>> Quantars, Thunderbolts, and 2 RTCM's. Master site is North, secondary
>>> Voter/TX site is West. Recently I have noticed significant choppy audio,
>>> mostly absent a PL, being transmitted from the West Site. It appears the
>>> repeater is keying/dekeying a couple times a second. On the West RTCM
>>> console I see:
>>>
>>> 02/27/2015 00:23:15.592  Inbound (Eth Rx) packet out of bounds by: -60
>>> 02/27/2015 00:23:25.532  Inbound (Eth Rx) packet out of bounds by: -60
>>> 02/27/2015 00:23:35.532  Inbound (Eth Rx) packet out of bounds by: -60
>>>
>>> Physical link between the sites is over a Ubiquiti 5GHz link, then
>>> fiber. IPSEC end to end. Voter Ping output is below.
>>>
>>> PING (West): Packets tx: 100, rx: 100, oos: 0, Avg.: 13.940 ms
>>> PING (West):  Worst: 22 ms, Best: 7 ms, 100.0% Packets successfully
>>> received (0.0% loss)
>>>
>>> Standard ping between Voter and West RTCM:
>>>
>>> 3297 packets transmitted, 3293 received, 0% packet loss, time 3297289ms
>>> rtt min/avg/max/mdev = 2.953/4.166/111.124/3.812 ms
>>>
>>> TX/RX buffers are 250ms. When I restart the West RTCM, the symptoms
>>> resolve for a hour or so, then begin to occur again.
>>>
>>> System was previously functioning normally. Only change has been from
>>> ADSL to fiber at the North site. West site was down for 2-3 weeks while the
>>> line was switched, so I can't absolutely correlate this issue to the
>>> connection change.
>>>
>>> Pings when the issue is occurring look good (<10ms voter to West RTCM)
>>>
>>> Any ideas?
>>>
>>> Thanks,
>>>
>>> Caleb
>>>
>>>
>>>
>>>
>>>
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>>
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