7 Nov
2022
7 Nov
'22
6:42 p.m.
Thanks for all the help.
I've installed pydecnet onto my HP microserver. It is running Ubuntu linux:
Linux hpm 5.4.0-131-generic #147-Ubuntu SMP Fri Oct 14 17:07:22 UTC 2022
x86_64 x86_64 x86_64 GNU/Linux
Also running on this machine is a simh instance called SIMVAX which is my
4.1 area router. It is configured as DECnet Phase IV.
At some point in the past I was connected to Steve Davidsons
bridge.declab.net:4711 via the bridge.c software, however I suspect that
hasn't been working for some time.
If I could get some help configuring pydecnet to work in a way which means
I can then take the HP Microserver with me and create a wifi to lan bridge,
probably using a separate PC, that would be great. Sorry, I've very rusty
with all this and have been having to rely on finger memory for some of the
VMS commands it's been that long!
Regards, Mark.
On Mon, 7 Nov 2022 at 14:25, Paul Koning <paulkoning(a)comcast.net> wrote:
So I'm puzzled. Why would IS-IS not work? If
multicast semantics are
implemented correctly (i.e., the multicast messages are delivered to all
stations other than the sender), it should all just work. Multicast is no
different from broadcast, and of course broadcast works.
Is this just a case of some badly designed access points that don't
understand how LANs work? FWIW, I have once or twice turned on PyDECnet on
a Wifi link. Of course that doesn't work because of the HIORD stuff, but
the multicast definitely do get delivered, I get adjacency up and all that.
paul
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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On Nov 6, 2022, at 6:24 PM, Johnny Billquist
<bqt(a)softjar.se> wrote:
I think all APs do multicasts over WiFi as unicasts to every client.
WiFi could, I
guess, in theory do true multicasting, but since it's all
acknowledged at the radio level, and encryption and what not, WiFi do it
all by unicasts. But that is basically hidden away, and usually works fine.
Much worse is that with DECnet you want to change the MAC address, which
WiFi gets
really messed up with, and it usually do not work well at all.
And that especially gets messed up when in combination with the
multicasting.
I didn't know that IS-IS had problems over WiFi. I learned something new
today. Cool. Thanks.
Johnny
On 2022-11-07 00:17, Peter Lothberg wrote:
> If you are to do native DECnet over WIFI, note that Ethernet multicast
> is a problem for WIFI and some AP's turns them in to unicasts to every
client..
> (This is the same problem as running IS-IS in
your home network...)
> -P
> ----- Original Message -----
>> From: "Paul Koning" <paulkoning(a)comcast.net>
>> To: "The Hobbyist DECnet mailing list"
<hecnet(a)lists.dfupdate.se>
>> Sent: Sunday, November 6, 2022 4:35:25 PM
>> Subject: [HECnet] Re: Ad-hoc connection to hecnet?
>> Indeed, for Phase IV and IV-plus. Fixed (obscurely) in IV-prime, and
in
Phase
>> V.
>>
>> Some day I should implement IV-prime in PyDECnet. It's not all that
hard.
>>
>> If you just want to use WiFi to run IP based tunnel type protocols,
there
is no
>> issue. And if the router you're
going to doesn't restrict the remote
IP
>> address for its traffic (in PyDECnet, you
can only do that for TCP
based
protocols: Multinet and DDCMP) then you should be able
to do "ad-hoc"
connections just fine.
paul
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