[Dxspider-support] PC41 loop?

[Lee Sawkins]

We agree on what is happening.  You may not call it a bug, but I do.  The 
reason hops must always be decremented and never increased is to prevent the 
exact problem we are experiencing.  Other cluster node software does not 
allow this "feature".

A hops count of 15 or 20 should be enough to make it to every cluster in the 
whole system.  As almost all clusters are now Internet linked, I doubt that 
any cluster is now more than 10 hops away from any other cluster.

Lee

----- Original Message ----- 
From: "Rene Olsen" <rene.chr.olsen at gmail.com>
To: <dxspider-support at dxcluster.org>
Sent: Wednesday, June 16, 2010 2:25 AM
Subject: Re: [Dxspider-support] PC41 loop?


> As far as I know there is no such thing as a hops bug in spider.
>
> But, it is a feature that has helped many in the past, that is now showing 
> a bad side efect.
>
> Way back, when there were not as many clusters as there is now, the 
> problem was that
> some clusters sent out the spots entered by their users with a hop count 
> of 15 or 20.
>
> That hop count was just too low, for spots to make it all around, and it 
> became obvious that
> some spots "died" along the way, because of the hop count.
>
> This is why the hops table was introduced into spider. With that file you 
> can manipulate the
> hop count of every PC frame as you like. This is why you will often see a 
> PC frame leave a
> spider node with a higher hop count than when it entered.
>
> Since we have dupe checking on spots and announcements, those gets 
> blocked. But it
> seems like there is no dupe check for PC41 frames. But if all PC41 frames 
> circles around the
> entire network 4 to 8 times a day, and maybe even for longer periods, then 
> we are wasting a
> lot of bw, and I think this should be addressed. One way or another.
>
> Vy 73 de Rene / OZ1LQH
>
> On 16 Jun 2010 at 1:35, Lee Sawkins wrote:
>
>> This hops bug has been in Spider for years.  I started reporting it when 
>> I
>> was a Spider sysop.  The problem is that Spider software does not 
>> decrement
>> hops properly.
>>
>> I can send out PC messages from CC Clusters to Spider with a hops count 
>> of
>> H1 and guess what, they come back to me with a higher hops count.  That 
>> is
>> why I have turned PC41 off.   They just keep looping around.
>>
>> Lee
>>
>> ----- Original Message ----- 
>> From: "Rene Olsen" <rene.chr.olsen at gmail.com>
>> To: <dxspider-support at dxcluster.org>
>> Sent: Tuesday, June 15, 2010 11:59 PM
>> Subject: [Dxspider-support] PC41 loop?
>>
>>
>> > Hi.
>> >
>> > I was monitoring a bit with watchdbg yesterday and today, and started 
>> > to
>> > wonder why there
>> > were so much PC41 trafic. I tehn decided to look at it a bit closer,
>> > because it looked to me,
>> > like it was the same information being sent over and over again.
>> >
>> > PC41^IZ7ECT^2^BARI^H16^~
>> >
>> > That one for example, I received no less than 6 times yesterday (debug
>> > file 166.dat).
>> >
>> > PC41^PA1LS^2^Halderberge^H3^~
>> >
>> > And that one I received 4 times.
>> >
>> > They don't come right after each other. The time stamps for the PA1LS 
>> > one
>> > is:
>> >
>> > 1276560016
>> > 1276572511
>> > 1276620498
>> > 1276634794
>> >
>> > Seems to me that a lot of bw is wasted on having this stuff circling
>> > around.
>> >
>> > Is there any reason for this?
>> >
>> > I doubt that someone actually updates his QTH or other info several 
>> > times
>> > a day :-)
>> >
>> > Vy 73 de Rene / OZ1LQH
>> >
>> >
>> >
>> > _______________________________________________
>> > Dxspider-support mailing list
>> > Dxspider-support at dxcluster.org
>> > http://mailman.tobit.co.uk/mailman/listinfo/dxspider-support
>>
>
>
>
>
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