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I have an Angelia board that I purchased from Anan about 18 months
ago which I use as an SDR in my home 2m DX station on a 28MHz
transverter IF and also use in the field with our contest group.<br>
<br>
Currently I use the Angelia primarily on RX with CuSDR as I like the
UI design and display.<br>
<br>
The problem that I have with the Angelia is that it appears to be
very 'touchy' (unreliable) with its Ethernet connection, obtaining a
DHCP lease and talking to my PC.<br>
<br>
In my setup I have:<br>
<o:p></o:p><br>
<span style="mso-spacerun:yes"> </span>1. my workstation PC -
Dell T3610, 16Gb, 6-core Xeon, etc. with Gigabit Ethernet<o:p></o:p><br>
<span style="mso-spacerun:yes"> </span>2. my Linux server which
is my default gateway and DHCP server<o:p></o:p><br>
<span style="mso-spacerun:yes"> </span>3. my Angelia board<o:p></o:p><br>
<span style="mso-spacerun:yes"> </span>4. Ethernet switch<br>
5. Various other devices (computers, VoIP phones, etc)<o:p></o:p><br>
<o:p></o:p><br>
If I connect everything in the shack via an old Netgear FS116
unmanaged 10/100Mbps switch then everything works fine - the Angelia
performs Ethernet link negotiation and comes up, sends DHCP request,
gets reply, sets up IP address, etc.<span style="mso-spacerun:yes">
after which </span>running up CuSDR on the PC works when I hit
'Start' it performs auto-detect, finds the Angelia and comes up...<o:p></o:p><br>
<br>
However this network set-up isn't practical for a range of
reasons... I have a rack of servers in the garage and that's also
where the internet comes in. I have have a machine (called "gate")
that provides network services, firewall, NAT, NTP, DHCP etc. in the
garage.<br>
<br>
I have my main PC, the wife's PC, network printers, VoIP phones,
etc. in the study/shack. At both ends there's a Netgeat GSM724T
24-port switch and a Gigabit fibre trunk runs between the switches.<br>
<br>
If I plug the Angelia and my shack PC in to two ports of the switch
in the shack and watch the DHCP server on gate with "dhcpdump" then
I see my PC perform DHCP request, get a reply and come up as
expected but when I turn the Angelia on I see nothing? What gives?<span
style="mso-spacerun:yes"> </span>Is the Ethernet implementation
in Hermes and Angelia 'fragile' or incomplete?<span
style="mso-spacerun:yes"> </span>Is there a problem with link
partner attributes? or timing when talking to managed switches<span
style="mso-spacerun:yes">? </span>Does Hermes/Angelia assume
that the link comes up very quickly and transmit DHCP request(s) too
soon or without retries?<o:p></o:p><o:p></o:p><br>
<br>
Is there something that can be done about this?<span
style="mso-spacerun:yes"><br>
<br>
I really want to be able to use the Angelia from one or other of
two locations in the house on the same local (switched) Ethernet.<br>
</span><o:p><br>
I'm happy to spend some time collecting diagnostics/debug if this
would help.<br>
<br>
<br>
Regards<br>
<br>
<br>
Mike G8TIC<br>
</o:p>
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