[Simh] VAX-11/780 DEUNA Ethernet problems with 4.3BSD

Sat Sep 13 21:59:46 EDT 2008

All I can say, is that 4.2, 4.3, 4.3 RENO don't work....
So at least it's consistent.

However 4.3 RENO will run on the microvax emulator.....

On Sat, Sep 13, 2008 at 9:24 AM, roy hills <royhills at hotmail.com> wrote:

>  Does anyone have any thoughts on this?
>
> I've got no idea how to approach this problem, so would appreciate any
> thoughts.
>
> Roy
>
> ------------------------------
> From: royhills at hotmail.com
> To: simh at trailing-edge.com
> Date: Fri, 15 Aug 2008 19:08:44 +0100
> Subject: [Simh] VAX-11/780 DEUNA Ethernet problems with 4.3BSD
>
>  I'm running 4.3BSD on the SIMH VAX-11/780 emulator, and I'm having some
> issues with the emulated DEUNA Ethernet adapter.  I'm using SIMH version 3.8
> on Windows XP.
>
> I've got two issues:
>
> 1.  The Ethernet adapter does not appear to respond to broadcasts (i.e.
> destination address ff:ff:ff:ff:ff:ff), so the system does not answer ARP
> requests.
>
> Here's an example tcpdump output.  The client is at IP address
> 192.168.1.57, and the 4.3BSD machine is at 192.168.1.70:
>
> 18:27:03.623364 00:0c:29:01:67:5a > ff:ff:ff:ff:ff:ff, ethertype ARP
> (0x0806), length 42: arp who-has 192.168.1.70 tell 192.168.1.57
> 18:27:03.725393 00:0c:29:01:67:5a > ff:ff:ff:ff:ff:ff, ethertype ARP
> (0x0806), length 42: arp who-has 192.168.1.70 tell 192.168.1.57
>
> 2.  The Ethernet adapter responds to packets sent to its own address, but
> replies from seemingly random source addresses.
>
> Here's an example of an ARP request sent to the SIMH system's MAC address
> of 08:00:2b:12:34:56.  We see that it replies with the correct MAC address
> in the ARP packet, but the source address in the Ethernet frame is
> aa:fd:00:00:00:00
>
> 18:29:48.059696 00:0c:29:01:67:5a > 08:00:2b:12:34:56, ethertype ARP
> (0x0806), length 42: arp who-has 192.168.1.70 tell 192.168.1.57
> 18:29:48.060160 aa:fd:00:00:00:00 > 00:0c:29:01:67:5a, ethertype ARP
> (0x0806), length 60: arp reply 192.168.1.70 is-at 08:00:2b:12:34:56
>
> Sending another directed ARP request gets a reply with a different source
> MAC address:
>
> 18:32:05.439533 00:0c:29:01:67:5a > 08:00:2b:12:34:56, ethertype ARP
> (0x0806), length 42: arp who-has 192.168.1.70 tell 192.168.1.57
> 18:32:05.445380 ab:b1:00:00:00:00 > 00:0c:29:01:67:5a, ethertype ARP
> (0x0806), length 60: arp reply 192.168.1.70 is-at 08:00:2b:12:34:56
>
> If I put a static ARP mapping on the client, I can telnet to the SIMH
> system and login.  The telnet session also uses random source addresses in
> the ethernet header, but surprisingly still works OK:
>
> 18:38:19.567264 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 74:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 0
> 18:38:19.574243 33:00:00:00:07:00 > 00:0c:29:01:67:5a, IPv4, length 60:
> 192.168.1.70.23 > 192.168.1.57.4658: tcp 0
> 18:38:19.574287 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 54:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 0
> 18:38:19.576378 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 78:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 24
> 18:38:19.589707 00:00:00:00:00:00 > 00:0c:29:01:67:5a, IPv4, length 60:
> 192.168.1.70.23 > 192.168.1.57.4658: tcp 3
> 18:38:19.589795 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 54:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 0
> 18:38:19.598110 27:ff:fd:05:07:00 > 00:0c:29:01:67:5a, IPv4, length 81:
> 192.168.1.70.23 > 192.168.1.57.4658: tcp 27
> 18:38:19.598160 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 54:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 0
> 18:38:19.599593 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 65:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 11
> 18:38:19.609339 1e:01:00:00:c0:a8 > 00:0c:29:01:67:5a, IPv4, length 107:
> 192.168.1.70.23 > 192.168.1.57.4658: tcp 53
> 18:38:19.609920 00:0c:29:01:67:5a > 08:00:2b:12:34:56, IPv4, length 60:
> 192.168.1.57.4658 > 192.168.1.70.23: tcp 6
> 18:38:19.616475 1e:01:00:00:c0:a8 > 00:0c:29:01:67:5a, IPv4, length 61:
> 192.168.1.70.23 > 192.168.1.57.4658: tcp 7
>
> The DEUNA configuration in the SIMH config file is:
>
> set xu enabled
> set xu mac=08-00-2B-12-34-56
> attach xu \Device\NPF_{A390A62C-E18B-45FC-A99F-FB039C5B4032}
>
> The SIMH system sees the DEUNA at boot, and gets the correct MAC address:
>
> de0 at uba0 csr 174510 vec 120, ipl 15
> de0: hardware address 08:00:2b:12:34:56
>
> And ifconfig shows the device OK:
>
> de0: flags=63<UP,BROADCAST,NOTRAILERS,RUNNING>
>         inet 192.168.1.70 netmask ffffff00 broadcast 192.168.1.255
>
> I'm running the original 1986 vintage 4.3BSD from the CSRG Archive CDROM
> installed on a virtual RA81 disk.  Apart from the DEUNA issue, it's working
> fine.
>
> Any ideas?
>
> Roy
>
>
> ------------------------------
> Find out how to make Messenger your very own TV! Try it Now!<http://clk.atdmt.com/UKM/go/101719648/direct/01/>
> ------------------------------
> Try Facebook in Windows Live Messenger! Try it Now!<http://clk.atdmt.com/UKM/go/111354030/direct/01/>
>
> _______________________________________________
> Simh mailing list
> Simh at trailing-edge.com
> http://mailman.trailing-edge.com/mailman/listinfo/simh
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.trailing-edge.com/pipermail/simh/attachments/20080913/90584c19/attachment-0003.html>