Net.fd

QNX Newsgroups (Archives) qdn.public.qnx4
1

Hi,

Is it possible to use Net.fd for connecting 2 ethernet networks?

We require connectivity solution for 2 QNX based ethernet networks
located in different areas of the city(shown as follows:-)
Serial Link
Node 1 Node2 -------------- Node3 Node4
| | |
|
—±--------------±- --±---------±----

LAN 1
LAN2

I was wondering whether it is possible to use Net.fd for this kind of
connectivity. If anyone has tried such an experiment, kindly provide your
comments. The diagram shows a serial link which is using microwave
communication for data transfer. At both ends data is made available on
RS232 port.

Is anyone aware of any other alternate solution for this kind of
connectivity?

Thanks,
Krupa

2

Previously, Krupa wrote in qdn.public.qnx4:

“Krupa” <seto@vsnl.com> wrote in news:accnrh$5j1$1@inn.qnx.com…

Hi,

Is it possible to use Net.fd for connecting 2 ethernet networks?
Yes, it is really possible.

We require connectivity solution for 2 QNX based ethernet networks
located in different areas of the city(shown as follows:-)
Serial Link
Node 1 Node2 -------------- Node3 Node4
| |
|
|
—±--------------±- --±---------±–

LAN 1
LAN2

I was wondering whether it is possible to use Net.fd for this kind of
connectivity.
Using of Net.fd on a serial link is the best way. Node 1 and 2 t will be

transparent to see node 3 , 4 and on the contrary. It is QNX4 !!!

If anyone has tried such an experiment, kindly provide your
comments. The diagram shows a serial link which is using microwave
communication for data transfer. At both ends data is made available on
RS232 port.

The good info is in /etc/readme/technochite/Net_brouting.

Is anyone aware of any other alternate solution for this kind of
connectivity?

Thanks,
Krupa



With best regards,

Shr.

3

“Shr” <shr_a@mail.ru> wrote in message news:acgke3$554$1@inn.qnx.com…

Previously, Krupa wrote in qdn.public.qnx4:

“Krupa” <> seto@vsnl.com> > wrote in news:accnrh$5j1$> 1@inn.qnx.com> …
Hi,

Is it possible to use Net.fd for connecting 2 ethernet networks?
Yes, it is really possible.

We require connectivity solution for 2 QNX based ethernet networks
located in different areas of the city(shown as follows:-)
Serial Link
Node 1 Node2 -------------- Node3 Node4
| |
|
|

–±---------±–

LAN 1
LAN2

I was wondering whether it is possible to use Net.fd for this kind
of
connectivity.

Yes but your serial link should be fairly fast, otherwise you’ll get all
sort of
problem. QNX networking protocol (FLEET) was not design to run on
slow medium.

Using of Net.fd on a serial link is the best way. Node 1 and 2 t will
be
transparent to see node 3 , 4 and on the contrary. It is QNX4 !!!
If anyone has tried such an experiment, kindly provide your
comments. The diagram shows a serial link which is using microwave
communication for data transfer. At both ends data is made available on
RS232 port.

The good info is in /etc/readme/technochite/Net_brouting.


Is anyone aware of any other alternate solution for this kind of
connectivity?

Thanks,
Krupa



With best regards,
Shr.

4

We have run Net.fd over a 115kbps serial link. Works fine.

Previously, Mario Charest wrote in qdn.public.qnx4:

“Shr” <> shr_a@mail.ru> > wrote in message news:acgke3$554$> 1@inn.qnx.com> …
Previously, Krupa wrote in qdn.public.qnx4:

“Krupa” <> seto@vsnl.com> > wrote in news:accnrh$5j1$> 1@inn.qnx.com> …
Hi,

Is it possible to use Net.fd for connecting 2 ethernet networks?
Yes, it is really possible.

We require connectivity solution for 2 QNX based ethernet networks
located in different areas of the city(shown as follows:-)
Serial Link
Node 1 Node2 -------------- Node3 Node4
| |
|
|

–±---------±–

LAN 1
LAN2

I was wondering whether it is possible to use Net.fd for this kind
of
connectivity.

Yes but your serial link should be fairly fast, otherwise you’ll get all
sort of
problem. QNX networking protocol (FLEET) was not design to run on
slow medium.

Using of Net.fd on a serial link is the best way. Node 1 and 2 t will
be
transparent to see node 3 , 4 and on the contrary. It is QNX4 !!!
If anyone has tried such an experiment, kindly provide your
comments. The diagram shows a serial link which is using microwave
communication for data transfer. At both ends data is made available on
RS232 port.

The good info is in /etc/readme/technochite/Net_brouting.


Is anyone aware of any other alternate solution for this kind of
connectivity?

Thanks,
Krupa



With best regards,
Shr.

\

5

Krupa <seto@vsnl.com> wrote:

Hi,

Is it possible to use Net.fd for connecting 2 ethernet networks?

We require connectivity solution for 2 QNX based ethernet networks
located in different areas of the city(shown as follows:-)
Serial Link
Node 1 Node2 -------------- Node3 Node4
| | |
|
—±--------------±- --±---------±----

LAN 1
LAN2

I was wondering whether it is possible to use Net.fd for this kind of
connectivity. If anyone has tried such an experiment, kindly provide your
comments. The diagram shows a serial link which is using microwave
communication for data transfer. At both ends data is made available on
RS232 port.

Is anyone aware of any other alternate solution for this kind of
connectivity?

Some years ago we solved this problem by an replacement of
qnx_net_alive(), running on each node. This replacement (called
‘netscan’) just detects ‘up’ nodes by attaching a VC to the Proc tasks
on each node every few seconds, then detaching it immediately.

It provided almost the same interface as ‘qnx_net_alive()’ so we could
easily replace it in the code (as far as I remember, we even chose the
function online: if ‘netscan’ is available, use it otherwise use
‘qnx_net_alive’ instead).

The other point was: choose the right netpoll parameters :slight_smile:) (longer
timeouts and more retries before killing a VC).


If you’re interested, I probably can post some code …

HTH,

:Karsten.

–

| / | __ ) | Karsten.Hoffmann@mbs-software.de MBS-GmbH
| |/| | _ _ \ Phone : +49-2151-7294-38 Karsten Hoffmann
| | | | |) |__) | Fax : +49-2151-7294-50 Roemerstrasse 15
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