On Fri, 22 Aug 2008 08:11:37 +0200, you wrote:
Unfortunately you can't specify the timeouts that the DNS lookups should use. :-(
This the main reason why I choose not to have that functionality in my code.
This reminds me that we had some circuit stability problems in the past, due
to network transients and probably also to abnormal DNS lookup delays which
stalled the bridge. For this, and to reduce overall idle network traffic, long
ago we decided to set DECnet hello timer and LAT keepalive delays up to 90
seconds replacing the 10 (15?) seconds default value. Since then our network
is a lot more stable, i.e. no more up'n'down in operator.log and drawbacks
caused by that change (like slower adjacency change detection and so on) are
far more acceptable than the original problem. :-)
BTW, our network is a lot smaller than HECnet and we ran without any router
for almost two years. In other words, one size does not fit all and YMMV. :-)
G.
John Wilson wrote:
From: gerry77 at mail.com
Also, name lookups can take time, and meanwhile the bridge is stopped. If someone have a seriously bad setup dns, this could means hanging the bridge for half a minute per such host (or more). It also increases the
Honestly I think we have overlooked that issue and never really considered it,
maybe because we never stumbled upon it. I wonder if it would be possible to
specify a very short timeout for DNS lookups while performed by the bridge...
... or spin off a thread and do the lookup there (the Right Way :-).
That would be the right way, yes. :-)
However, I don't really feel like rewriting it as a threaded application. If I would, then I think I'd get rid of the select code as well, and have one thread per link, or possibly two...
But I'm just not enough motivated. Right now, I'm more interested in doing some more hacking in RSX...
Speaking of which. Is there anyone who have the complete distribution of Modula-2 for RSX? I have a somewhat damaged distribution, but would like to get it complete.
Johnny
Zane H. Healy wrote:
By they way, Angela, you don't need to be running dnroute if your node
is an end-node (which it seems to be). In a situation where the rest of
it doesn't seem to be working properly it's only confusing the issue I
suspect :)
Chrissie,
Am I reading this to mean that it is possible to use a Linux box as a DECnet
Area Router? If so how hard is it to setup on Ubuntu? I haven't played
with Linux DECnet in close to a decade.
It should be fairly easy, though I haven't done it for ages!
If Ubuntu has the same startup scripts as Debian then it should be just
a case of enabling routing in /etc/defaults/decnet and starting the
dnroute daemon (which you can also specify in that file). dnroute will
listen for (and send) routing messages and set routes to the nodes it
finds. To use Linux as an area router you need to do a few more things
such as start dnroute with the '-2' switch and tell the kernel the
router level eg:
echo "2" > /proc/sys/net/decnet/conf/eth0/forwarding
echo "2" > /proc/sys/net/decnet/conf/eth1/forwarding
echo "10" > /proc/sys/net/decnet/conf/eth0/priority
echo "10" > /proc/sys/net/decnet/conf/eth1/priority
the dnetinfo command will query the status of the routing daemon and
give you a display similar to the VMS SHOW NETWORK[/OLD] command.
/me makes a note to update the FAQ
Chrissie
gerry77 at mail.com skrev:
On Thu, 21 Aug 2008 11:58:01 +0200, you wrote:
What about http://decnet.ipv7.net/files/decnet-bridge_0.7-4.tar.gz ? :-P
A few things should perhaps be pointed out. The config file is not compatible with my bridge program, so people who change need to be aware that they have to modify that.
... Or you (or someone else) could integrate into your original bridge some of
our changes when- where- and however you like. You granted us permission to
use your code as a starting point for our modifications, now you are obviously
entitled to do whatever you want with our code. Don't even think to ask. :-)
Well, I would keep LAT and Infoserver traffic separate. :-)
Also, name lookups can take time, and meanwhile the bridge is stopped. If someone have a seriously bad setup dns, this could means hanging the bridge for half a minute per such host (or more). It also increases the
Honestly I think we have overlooked that issue and never really considered it,
maybe because we never stumbled upon it. I wonder if it would be possible to
specify a very short timeout for DNS lookups while performed by the bridge...
Unfortunately you can't specify the timeouts that the DNS lookups should use. :-(
This the main reason why I choose not to have that functionality in my code.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
With all this activity going on I just couldn't stay offline. :^) I swapped out my VLC for a VAXstation 4000/60 tonight (much quieter), so PDXVAX and MONK are back online. This also means that http://www.avanthar.com:8080/nodes/ works again.
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
By they way, Angela, you don't need to be running dnroute if your node
is an end-node (which it seems to be). In a situation where the rest of
it doesn't seem to be working properly it's only confusing the issue I
suspect :)
Chrissie,
Am I reading this to mean that it is possible to use a Linux box as a DECnet
Area Router? If so how hard is it to setup on Ubuntu? I haven't played
with Linux DECnet in close to a decade.
Thanks,
Zane
I wouldn't trust the output from "SHOW NETWORK". I've got a similar issue on my system where "SHOW NETWORK" gives me out of date information.
What'd I'd suggest you look at is:
NCP> show exec status
or
NCP> show exec char
This will show you DECnet's currently configured address.
The information from "SHOW NETWORK" is merely poked in at system-startup time and may not reflect subsequent configuration changes.
--Marc
From: gerry77 at mail.com
Also, name lookups can take time, and meanwhile the bridge is stopped.
If someone have a seriously bad setup dns, this could means hanging the
bridge for half a minute per such host (or more). It also increases the
Honestly I think we have overlooked that issue and never really considered it,
maybe because we never stumbled upon it. I wonder if it would be possible to
specify a very short timeout for DNS lookups while performed by the bridge...
... or spin off a thread and do the lookup there (the Right Way :-).
John Wilson
D Bit
On Thu, 21 Aug 2008 11:58:01 +0200, you wrote:
What about http://decnet.ipv7.net/files/decnet-bridge_0.7-4.tar.gz ? :-P
A few things should perhaps be pointed out. The config file is not
compatible with my bridge program, so people who change need to be aware
that they have to modify that.
... Or you (or someone else) could integrate into your original bridge some of
our changes when- where- and however you like. You granted us permission to
use your code as a starting point for our modifications, now you are obviously
entitled to do whatever you want with our code. Don't even think to ask. :-)
Also, name lookups can take time, and meanwhile the bridge is stopped.
If someone have a seriously bad setup dns, this could means hanging the
bridge for half a minute per such host (or more). It also increases the
Honestly I think we have overlooked that issue and never really considered it,
maybe because we never stumbled upon it. I wonder if it would be possible to
specify a very short timeout for DNS lookups while performed by the bridge...
G.
Hi all, trying to set up my Alpha (running VMS 8.3) on HECnet.
I installed DECnet Phase IV and configured it using NETCONFIG.COM,
told it to use my new node ID 2.150
I have set up a Multinet DECnet-over-IP link
However, SHOW NET gives me "Product: DECNET Node: LOKI
Address(es): 1.1"
Do I need to change the node address somewhere else? Have I missed a step?
It has been a long time since I've installed and configured DECnet, but do
you simply need to stop and restart DECnet?
Zane
