Since Linux isn't using/managing the interface, the Linux routing table
or ARP cache is not involved.
You could try running tcpdump on the interface to see if all packets
come in, and whether packets go out.
Johnny
On 2016-08-24 23:16, David Coolbear wrote:
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
<http://192.168.1.4/24>) running on the Linux host (192.168.1.2/24
<http://192.168.1.2/24>) to the cable router (192.168.1.1/24
<http://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]> <mailto:[email protected]>
To: [email protected] <mailto:[email protected]>
Subject: Re: [Simh] Packet Loss
Message-ID: <[email protected]>
<mailto:[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]> <mailto:[email protected]>
To: David Coolbear <[email protected]> <mailto:[email protected]>,
"[email protected]" <mailto:[email protected]>
<[email protected]> <mailto:[email protected]>
Subject: Re: [Simh] Packet Loss
Message-ID:
<03006e3fc39b5a48ab9dbccc101090a82e030f1...@redroof2.alohasunset.com>
<mailto: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
<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
<https://github.com/simh/simh/issues> and
we can explore the details further.
Good Luck.
- Mark
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--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: [email protected] || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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