<div dir="auto">You have 2 network cards per device. Why not separate network between 1 and 2.<div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 19, 2021, 13:06 Derek Atkins via Ale <<a href="mailto:ale@ale.org" target="_blank" rel="noreferrer">ale@ale.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">HI.<br>
<br>
I'm having a strange networking issue between two AWOW devices running<br>
Linux that stopped talking to each other. The devices are configured as<br>
below:<br>
<br>
--(a)[Box 1](b) ----- (c)[Box 2](d)--<br>
<br>
Where:<br>
(a) is <a href="http://172.16.5.0/16" rel="noreferrer noreferrer noreferrer" target="_blank">172.16.5.0/16</a><br>
(b) is <a href="http://172.16.5.1/16" rel="noreferrer noreferrer noreferrer" target="_blank">172.16.5.1/16</a><br>
(c) is <a href="http://172.16.7.100/16" rel="noreferrer noreferrer noreferrer" target="_blank">172.16.7.100/16</a><br>
(d) is <a href="http://172.16.7.0/16" rel="noreferrer noreferrer noreferrer" target="_blank">172.16.7.0/16</a><br>
<br>
The (b)/(c) link is a direct link between the devices, not a crossover<br>
cable, and no switch.<br>
<br>
The two devices were talking fine for a while and then all of a sudden<br>
they stopped. Now that won't talk at all. When truing to ping .7.100<br>
from Box 1, it sends out ARPs but there is no ARP response from Box 2. <br>
Similarly, on Box 2 trying to ping .5.1 results in no ARP responses.<br>
<br>
Both devices show the (b)/(c) link as up. Running ethtool shows the link<br>
is detected. However arp -an shows an incomplete response (no surprise).<br>
<br>
The dmesg output doesn't show anything.<br>
<br>
I am at a loss. I don't understand how or why the two devices would stop<br>
talking, and why neither will pick it up again.<br>
<br>
Any suggestions for where to look or how else to debug this?<br>
<br>
Thanks,<br>
<br>
-derek<br>
<br>
-- <br>
Derek Atkins 617-623-3745<br>
<a href="mailto:derek@ihtfp.com" rel="noreferrer noreferrer" target="_blank">derek@ihtfp.com</a> <a href="http://www.ihtfp.com" rel="noreferrer noreferrer noreferrer" target="_blank">www.ihtfp.com</a><br>
Computer and Internet Security Consultant<br>
<br>
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</blockquote></div>