I tried running on the new version of simh - git commit id: 25b9fc22, but there was no noticeable difference.
I mentioned two simulators for completeness of discussion but that's not typical. Typically I only run one at a time. When I do run two, I use a unique MAC address for the VAX simulator so that I can run both at the same time without having duplicate MACs. For essentially all my testing I've been focusing on the PDP11 simulator and the VAX simulator isn't running. The ping test shown in my initial email is from the simulated PDP11 (192.168.1.4/24) running on the Linux host (192.168.1.2/24) to the cable router (192.168.1.1/24). The cable router is the default route for both the simulated PDP11 and the Linux host. As I mentioned before, the PDP11 is attached to a dedicated NIC and that NIC is up but doesn't have an IP address assigned. My instinct is that the problem is with the Linux host and not the simulator since this was working at one time (before I upgraded the Linux OS). I'm wondering if I need to mess with the routing table or arp table in the Linux host. Message: 2 Date: Tue, 23 Aug 2016 19:16:02 +0200 From: Johnny Billquist <[email protected]> <[email protected]> To: [email protected] Subject: Re: [Simh] Packet Loss Message-ID: <[email protected]> <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed "Between simulators" ...? So you are running two simulators, and if I understand all of your text correctly, you have the same MAC address on both of them? In that case, I would indeed expect for each one, to on average only get a 50% success rate on ping packets. Johnny ------------------------------ Message: 3 Date: Tue, 23 Aug 2016 12:28:44 -0700 From: Mark Pizzolato <[email protected]> <[email protected]> To: David Coolbear <[email protected]> <[email protected]>, "[email protected]" <[email protected]> <[email protected]> <[email protected]> Subject: Re: [Simh] Packet Loss Message-ID: <03006e3fc39b5a48ab9dbccc101090a82e030f1...@redroof2.alohasunset.com> <03006e3fc39b5a48ab9dbccc101090a82e030f1...@redroof2.alohasunset.com> Content-Type: text/plain; charset="utf-8" Hi David, First I would suggest that you run the latest code which has significantly improved networking. The latest is available from https://github.com/simh/simh/archive/master.zip It is not clear from the below description, but from what Johnny read ‘in between the lines’ you have both the VAX and PDP11 simulators configured with the same MAC address. This would indeed be an error on your part (and the latest code would tell you that). Meanwhile, once unique MAC addresses are configured for each simulator (which would happen automatically if you didn’t explicitly have a “SET XQ MAC=…” command using the latest code), then your dedicated to simh NIC model should work well. If it doesn’t, please create an issue at https://github.com/simh/simh/issues and we can explore the details further. Good Luck. - Mark
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