I use this script to setup the tap/br interface with simh 3.9not sure where i
got it from so can't give proper credit but thanks to whoever supplied this
#!/bin/shHOSTIP=`/sbin/ifconfig eth0 | grep "inet addr" | gawk -- '{ print $2
}' | gawk -F : -- '{ print $2 }'`HOSTNETMASK=`/sbin/ifconfig eth0 | grep "inet
addr" | gawk -- '{ print $4 }' | gawk -F : -- '{ print $2
}'`HOSTBCASTADDR=`/sbin/ifconfig eth0 | grep "inet addr" | gawk -- '{ print $3
}' | gawk -F : -- '{ print $2 }'`HOSTDEFAULTGATEWAY=`/sbin/route -n | grep
^0.0.0.0 | gawk -- '{ print $2 }'`#/sbin/tunctl -u root -t tap0/sbin/ifconfig
tap0 up## Now convert eth0 to a bridge and bridge it with the TAP
interface/sbin/brctl addbr br0/sbin/brctl addif br0 eth0/sbin/brctl setfd br0
0/sbin/ifconfig eth0 0.0.0.0/sbin/ifconfig br0 $HOSTIP netmask $HOSTNETMASK
broadcast $HOSTBCASTADDR up# set the default route to the br0
interface/sbin/route add -net 0.0.0.0/0 gw $HOSTDEFAULTGATEWAY# bridge in the
tap device/sbin/brctl addif br0 tap0/sbin/ifconfig tap0 0.0.0.0
# Run simulator and "attach xq tap:tap0"
Date: Tue, 4 Sep 2012 18:22:55 -0700
From: [email protected]
To: [email protected]
Subject: Re: [Simh] Connecting to Ethernet
Mark
Thanks for that detailed information. I feel much more comfortable with the
specific commands. Too late tonight to do it, but I'll let you know about the
results tomorrow. I assume you have more confidence in SIMH 3.9 networking
than the version I'm using. Hope you're right. I'll study the readme, too.
David.
--- On Tue, 9/4/12, Mark Pizzolato - Info Comm <[email protected]> wrote:
From: Mark Pizzolato - Info Comm <[email protected]>
Subject: RE: [Simh] Connecting to Ethernet
To: "[email protected]" <[email protected]>, "[email protected]"
<[email protected]>
Date: Tuesday, September 4, 2012, 4:53 PM
Hi David, It shouldn’t be too hard to download and build with all available
networking options on Ubuntu 11.10: $ apt-get
install make $ apt-get install libpcap-dev $ apt-get install libvdeplug2-dev
$ apt-get install vde2 $ apt-get install bridge-utils $ apt-get install
uml-utilities Some or all of the above may have been already done in your
environment, but it won’t hurt anything to do them again. They will need to be
done as root. To build the vax simulator: $ wget
http://simh.trailing-edge.com/sources/simhv39-0.zip $ mkdir simhv3.9-0 $ cd
simhv3.9-0 $ unzip -a ../simhv39-0.zip $ make vaxThe vax simulator binary
will be in BIN/vax. This simulator has built in support for all of the
available networking options. Details are available in 0readme_ethernet.txt in
the simhv3.9-0 directory. - Mark
From: [email protected] [mailto:[email protected]]
On Behalf Of [email protected]
Sent: Tuesday, September 04, 2012 3:57 PM
To: [email protected]
Subject: Re: [Simh] Connecting to Ethernet Mark
Well I'm just lazy and use the Ubuntu
GUI tools (Ubuntu Software Center and synaptic) to download and build. I
realize their databases often aren't up-to-date. But you bring up a good
point. Would this problem be solved easier with 3.9?
David.
--- On Tue, 9/4/12, Mark Pizzolato - Info Comm <[email protected]> wrote:
From: Mark Pizzolato - Info Comm <[email protected]>
Subject: RE: [Simh] Connecting to Ethernet
To: "Sergey Oboguev" <[email protected]>, "[email protected]"
<[email protected]>, "[email protected]" <[email protected]>
Date: Tuesday, September 4, 2012, 11:41 AMHi David, I’m wondering why you are
not using simh v3.9. If I had been participating in this discussion from the
beginning I’d have recommended you start from the latest released code since
there were numerous networking changes included there. The simh v3.9-0 release
code is available at: http://simh.trailing-edge.com/sources/simhv39-0.zip -
Mark From: [email protected]
[mailto:[email protected]] On Behalf Of Sergey Oboguev
Sent:
Tuesday, September 04, 2012 10:57 AM
To: [email protected]; [email protected]
Subject: Re: [Simh] Connecting to Ethernet (typos fixed)
Hi David,
To begin with, on host side you have network mask for A-class IP address
defined as for C-class address.
Which *may* be ok, but subnet/broadcast masks definitions mismatch on host side
and VAX side.
You need to have them equal.
This also distorts routing table on the host side.
See http://en.wikipedia.org/wiki/IP_classes
Note "may" in "may be ok". Though A/B/C class scheme is supposed to be retired,
I'd rather stick to standard masking as initial step, just because not all
software, especially legacy software, may implement non-standard masking 100%
correctly. (As a matter of fact I have a set-up that uses A-class private
subnet, but it uses standard-size A class masks, i.e. 255.0.0.0 rather than
255.255.255.0.)
Fix this for a start and see what happens.
This said, it is suspicious that DELQA MAC address does not appear in list of
MAC addresses seen by the bridge and that tap0 counters are all 0.
But begin by fixing masks, do some pinging, and if it still does not work
repost new data.
Also see if SHOW DEVICE XQ /FULL indicates any errors.
- Sergey From: "[email protected]" <[email protected]>
To: [email protected]
Sent: Tue, September 4,
2012 10:10:52 AM
Subject: Re: [Simh] Connecting to EthernetSergey
I printed the data you asked for and made no changes to VAX because they looked
OK to me. TCPIP SHOW ROUTE looped and produced no output.
I appreciate your examination of this problem.
Diagnostic data follows......
On Linux(Ubuntu) IP: 10.0.0.2 kermel 2.6.38-15-generic .....
david@Thinkpad:~/vax$ ifconfig
br0 Link encap:Ethernet HWaddr 00:16:36:29:e6:7b
inet addr:10.0.0.2 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::216:36ff:fe29:e67b/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11 errors:0 dropped:0 overruns:0 frame:0
TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:811 (811.0 B) TX bytes:16459 (16.4 KB)
eth0 Link encap:Ethernet HWaddr 00:16:36:29:e6:7b
inet6 addr: fe80::216:36ff:fe29:e67b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:81237 errors:0
dropped:0 overruns:0 frame:0
TX packets:73843 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:80090941 (80.0 MB) TX bytes:11682488 (11.6 MB)
Interrupt:16
tap0 Link encap:Ethernet HWaddr 86:bc:f0:f2:2c:de
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
david@Thinkpad:~/vax$ brctl show
bridge name bridge id STP enabled interfaces
br0 8000.00163629e67b no eth0
tap0
david@Thinkpad:~/vax$ brctl show br0
bridge name bridge id STP enabled interfaces
br0 8000.00163629e67b no eth0
tap0
david@Thinkpad:~/vax$ brctl showmacs br0
port no mac addr is local? ageing timer
1 00:0d:4b:4b:3d:ab no 6.52
1 00:16:36:29:e6:7b yes 0.00
1 00:21:6a:75:6d:04 no 63.15
2 86:bc:f0:f2:2c:de yes 0.00
1 e0:46:9a:58:62:14 no 31.61
david@Thinkpad:~/vax$ route -n
Kernel IP routing table
Destination Gateway
Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 br0
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 br0
In SIMH ......
sim> sho ver
VAX simulator V3.8-1 [64b data, 64b addresses, Ethernet support]
sim> show xq
XQ, address=20001920-2000192F, no vector, MAC=08:00:2B:AA:BB:CC, type=DELQA,
poll=100, attached to tap0
In OpenVMS V7.3 on node MYVAX 4-SEP-2012
$ tcpip show interface
/full
Interface: LO0
IP_Addr: 127.0.0.1 NETWRK: 255.0.0.0 BRDCST:
MTU: 4096
Flags: UP LOOP NOARP MCAST SMPX
RECEIVE SEND
Packets 0 0
Errors 0 0
Collisions: 0
Interface: QE0
IP_Addr: 10.0.0.99 NETWRK: 255.0.0.0 BRDCST: 10.255.255.255
Cluster
C_Addr: C_NETWRK: C_BRDCST:
Ethernet_Addr: 08-00-2B-AA-BB-CC MTU: 1500
Flags: UP BRDCST RUN MCAST SMPX
RECEIVE SEND
Packets
0 5
Errors 0 0
Collisions: 0
$ tcpip show route /full
MYVAX::SYSTEM 09:53:18 TCPIP$UCP CPU=00:00:03.15 PF=4490 IO=341 MEM=931
MYVAX::SYSTEM 09:53:22 TCPIP$UCP CPU=00:00:03.15 PF=4502 IO=347 MEM=943
MYVAX::SYSTEM 09:53:29 TCPIP$UCP CPU=00:00:03.16 PF=4502 IO=353 MEM=943
Interrupt
SHOW ROUTE just hangs .. well, I see it's doing I/Os, but no results.
$ mc tcpip$ping 10.0.0.2
Hangs as well.
--- On Mon, 9/3/12, Sergey
Oboguev <[email protected]> wrote:
From: Sergey Oboguev <[email protected]>
Subject: Re: [Simh] Connecting to Ethernet
To: [email protected], [email protected]
Date: Monday, September 3, 2012, 5:34 PMDid you remember to configure the
interface in TCP/IP services for OpenVMS?
Assuming for the sake of example that your host uses IP
address 192.168.21.3 for
(initially) eth0 and (subsequently after bridging) br0, and assuming you want
to
assign
IP address 192.168.21.200 to VAX instance, you need to configure QE0 inside VMS
as follows:
$ TCPIP SET INTERFACE QE0 /HOST=192.168.21.200
$ TCPIP SET CONFIGURATION INTERFACE QE0 /HOST=192.168.21.200
Depending on exact value of network addresses being used and network topology
it
may be necessary to additionally specify options /NETWORK_MASK=n.n.n.n and
/BROADCAST_MASK=m.m.m.m, although usually VMS TCP/IP picks correct defaults for
the masks.
If it still does not work, please post the output of
$ TCPIP SHOW INTERFACE /FULL
$ TCPIP SHOW ROUTE /FULL
and (in Linux)
ifconfig br0
ifcongig eth0
ifconfig tap0
brctl show
brctl
show br0
brctl showmacs br0
route -n
and (at SIMH command console prompt)
show xq
Thanks,
Sergey
________________________________
From: "[email protected]" <[email protected]>
To: [email protected]
Sent: Mon, September 3, 2012 4:10:48 PM
Subject: Re: [Simh] Connecting to Ethernet
Sergey
That was a big help, but I'm not there yet. I did the following
$ sudo ./ linux-tap.sh create br0 eth0 tap0 david
$ sudo vax ; to start
SIMH
simh> ; the usual stuff
simh> set xq mac=bla bla
simh> att tap0 ; hooray, this is the first time this succeeded.
simh> boot cpu
When logged into VMS, I could PING and TELNET to LOCALHOST (and 127.0.0.1).
But alas, not to my physical host. And my physical host can't see the VAX
either.
But I did so many things to get to this point that something else might be
screwed up, so I need to reboot linux and start this drill again.
Thanks for a great start!
Any other suggestions?
--- On Mon, 9/3/12, Sergey Oboguev <[email protected]> wrote:
>From: Sergey Oboguev <[email protected]>
>Subject: Re: [Simh] Basic questions
>To: [email protected], [email protected]
>Date: Monday, September 3, 2012, 12:20 PM
>
>
>> In particular I get the following error:
>> david@Thinkpad:~$ sudo brctl addbr br0
>> david@Thinkpad:~$ sudo ifconfig tap0 up
>> tap0: ERROR while getting interface flags: No such device
>
>Perhaps because
>
> /usr/sbin/tunctl -t $TAPDEV -u $USERID
>
>is missing.
>
>You may find the following script helpful:
>http://oboguev.net/misc/linux-tap.sh.txt
>
>Usage is at the bottom or invokable as
>
> ./linux-tap.sh help
>
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