[HECnet] Intermittent Connection with PyDECnet?

Paul Koning paulkoning at comcast.net
Mon Mar 9 11:49:37 PDT 2020



> On Mar 9, 2020, at 2:34 PM, Mark J. Blair <nf6x at nf6x.net> wrote:
> 
> 
> 
>> On Mar 9, 2020, at 10:07 AM, Paul Koning <paulkoning at comcast.net> wrote:
>> I haven't used TAP in ages; when I need bridging I use Johnny's bridge.  But the message ("No hardware address") means that PyDECnet tried to find out the MAC address for the interface you mentioned and could not do so.  You can avoid that by specifying an address explicitly.
> 
> Hmm. I also got that error when I set the correct hardware address on the tap0 interface before launching pydecnet.

PyDECnet is doing a pcap.findalldevs to look for the device you specified.  If that request doesn't work then you'd see this outcome.

What I meant is to specify the address (--hwaddr <addr> or --random-address) in the circuit config line.  If you do that then PyDECnet doesn't attempt to find the hardware address from the OS.

	paul




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