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

Pierre Martel petem001 at gmail.com
Mon Sep 25 20:20:15 EDT 2017


I would not put my link in half duplex as it will put a lot more latency
then in full duplex, if auto negotiate is a problem you can still keep the
link in higher speed and full duplex, it is just if the hardware facing the
rtcm that is not fully compatible at the hardware level as the speed
negotiation is a hardware thing, not a tcp/ip protocol thing.

One other thing, if you ever have one device on the network that start
broadcasting a lot if it has a 100 Mbps connection to your switch/router it
will over saturate the 10 Mbps link and make it loose a lot of packet. Even
if it's just using 20 Mbps for its broadcast it will be twice the bandwidth
the rtcm can handle. Be careful with such setup. I had a place where a 10
Mbps alarm system it would signal a trouble as soon someone would listen to
a ip radio station cause the router/proxy was converting multicast packet
as broadcast packet to the local network. The poling packet from the
central station was lost in noise...



Le dim. 24 sept. 2017 à 05:29, Hayden Honeywood <haydenph91 at gmail.com> a
écrit :

> Thanks to you both Lee and Jesse.
>
> Yes I've followed the buffer setting as per the link you sent Lee. I've
> slowly increased the values though as I've run into this issue.
>
> The asterisk server is located on the same router as the Master RTCM
> (latency <2ms).
>
> Just today another ham mentioned to me that having the RTCM set on auto
> negotiation can cause ethernet issues... so I've changed that to negotiate
> only at 10Mbps 1/2 duplex on the Master site.
>
>
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