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Link Timer question ?

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  • Bill Erhardt
    Howdy from Bill, After watching all this run now for a couple days, I asked myself why is the link timer pinging every two minutes. Can I set it to say 5
    Message 1 of 10 , Dec 2, 2010
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      Howdy from Bill,
       
      After watching all this run now for a couple days, I asked myself why is the link timer pinging every two minutes. Can I set it to say 5 minutes and stop some of the extra RF traffic out there.
       
      The X1J4 nodes are also set to two minutes and they are just pinging like heck out here.  I know there are like 4 and I am now the 5th Node all within hearing distance of each other and maybe this is a problem There are 4 X1J4 on Mountain Tops all within 40 miles of each other and I can hear all 4 of them at my house with BPQ 32. Man what a lot of rf packet racket doing link tests.....
       
      Just wondering as this is my first time as a sysop sorta kinda......
       
      Bill K7MT
    • Bill
      Bill I assume the X1J4 nodes are running from PROMS. They would need to burn a new set for each one to change the link timer parameter. For the situation with
      Message 2 of 10 , Dec 2, 2010
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        Bill

                        I assume the X1J4 nodes are running from PROMS. They would need to burn a new set for each one to change the link timer parameter. For the situation with 5 nodes I would use 10 to 15 min. All you can do is to contact the sys op of each node and discuss the situation. 20 fames ever 2 min seems excessive just for link maintenance.

        73 Bill

         N9ACQ    

      • Facility 406 DM09
        20 fames ever 2 min seems excessive just for link maintenance. One of the jackasses in our region is running up to four per second. Kurt
        Message 3 of 10 , Dec 2, 2010
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          "20 fames ever 2 min seems excessive just for link maintenance."

          One of the jackasses in our region is running up to four per second.

          Kurt
        • Mike Melnik
          Bill The ping is being sent from your Node (Keep Alive) there are a couple of ways To solve this in BPQ32.CFG, 1 would be to set the RF Port QUALITY=0 this
          Message 4 of 10 , Dec 2, 2010
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            Bill

            The ping is being sent from your Node (Keep Alive) there are a couple of
            ways
            To solve this in BPQ32.CFG,
            1 would be to set the RF Port QUALITY=0 this will stop any nodes
            Broadcast and ID from your Station and stop the Keep Alive Poll

            The second way is to lock the route of the nodes you are having problems
            with
            The Quality of each locked route will have to be 1 less then the RF Port
            MINQUAL=168 (typical setting) Example using my Node Call:
            ROUTES
            N9PMO-2,167,1,0,0,0,2
            Where as 167 is 1 less then MINQUAL,RF Port 1, Mask Value 0,0,0,2

            Mike Melnik-N9PMO
            Web WWW.N9PMO.com
            Group Moderator http://groups.yahoo.com/group/BPQ32/
            -----Original Message-----
            From: BPQ32@yahoogroups.com [mailto:BPQ32@yahoogroups.com] On Behalf Of Bill
            Erhardt
            Sent: Thursday, December 02, 2010 9:06 PM
            To: BPQ32@yahoogroups.com
            Subject: [BPQ32] Link Timer question ?




            Howdy from Bill,
             
            After watching all this run now for a couple days, I asked myself why is the
            link timer pinging every two minutes. Can I set it to say 5 minutes and stop
            some of the extra RF traffic out there.
             
            The X1J4 nodes are also set to two minutes and they are just pinging like
            heck out here.  I know there are like 4 and I am now the 5th Node all within
            hearing distance of each other and maybe this is a problem There are 4 X1J4
            on Mountain Tops all within 40 miles of each other and I can hear all 4 of
            them at my house with BPQ 32. Man what a lot of rf packet racket doing link
            tests.....
             
            Just wondering as this is my first time as a sysop sorta kinda......
             
            Bill K7MT
          • Bill V WA7NWP
            ... Every parameter in the running X1J4, except the callsign, can be changed remotely... Bill - WA7NWP
            Message 5 of 10 , Dec 2, 2010
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              >                 I assume the X1J4 nodes are running from PROMS. They would need to burn a new set for each one to change the link timer parameter.

              Every parameter in the running X1J4, except the callsign, can be
              changed remotely...

              Bill - WA7NWP
            • Bill
              Better yet. I learn something every day. 73 Bill N9ACQ
              Message 6 of 10 , Dec 2, 2010
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                                Better yet. I learn something every day.

                73 Bill

                N9ACQ

              • Bill V WA7NWP
                ... I learned today, that the slot machines at the casinos in Washington are just automated pull tab machines. Wow. X1J4 is amazing software. IP routing,
                Message 7 of 10 , Dec 2, 2010
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                  On Thu, Dec 2, 2010 at 10:06 PM, Bill <n9acq@...> wrote:
                  >
                  >
                  >
                  >                 Better yet. I learn something every day.


                  I learned today, that the slot machines at the casinos in Washington
                  are just automated pull tab machines. Wow.

                  X1J4 is amazing software. IP routing, deviation meter, digipeating,
                  L4 node functions and it can even pass all the packets it hears out
                  the serial port in KISS protocol. That's the sole reason I have a
                  box of MFJ 1270 TNC's waiting to be tuned up and put to use as nodes.

                  X1J4 is available as source though the compile chain to make it work
                  is apparently a serious challenge. One fellow did a few years ago
                  and the result is the UI-DIGI APRS firmware.

                  Ah for the good old days of node hopping...

                  73
                  Bill - WA7NWP
                • John Wiseman
                  Bill The node normally keeps a link open to each NETROM neighbour. This ensures that nodes are actually reachable - you can get routing problems if you hear
                  Message 8 of 10 , Dec 3, 2010
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                    Message
                    Bill
                     
                    The  node normally keeps a link open to each NETROM neighbour. This ensures that nodes are actually reachable - you can get routing problems if you hear nodes that can't hear you.
                     
                    In your situation of 5 nodes on one frequency, the overhead of this may be too much. The real answer is a better network design, but you can turin off the link verification by adding
                     
                    NOKEEPALIVES=1

                    to the PORT configuration of yout RF port. You will then only open up links to nodes when you have traffic to pass.

                    You can fiddle with the link verification timer, but this is there to make sure failed links are detected, so I wouldn't recommend running at much more than the standard 180 seconds. Sometimes you will see both ends of the link sending a verification poll (RR P) at the same time, doubling the overhead. If this happens set the timer at each node to a slightly different value - say 290, 295, 300, etc..

                    With 5 nodes on a 1200 bps channel you will also need to manage the NODES broadcasts carefully to avoid filling the channel with NODES broadcasts.

                    73,

                    John

                     

                     

                     

                     

                     

                     

                    -----Original Message-----
                    From: BPQ32@yahoogroups.com [mailto:BPQ32@yahoogroups.com] On Behalf Of Bill Erhardt
                    Sent: 03 December 2010 03:06
                    To: BPQ32@yahoogroups.com
                    Subject: [BPQ32] Link Timer question ?

                     

                    Howdy from Bill,
                     
                    After watching all this run now for a couple days, I asked myself why is the link timer pinging every two minutes. Can I set it to say 5 minutes and stop some of the extra RF traffic out there.
                     
                    The X1J4 nodes are also set to two minutes and they are just pinging like heck out here.  I know there are like 4 and I am now the 5th Node all within hearing distance of each other and maybe this is a problem There are 4 X1J4 on Mountain Tops all within 40 miles of each other and I can hear all 4 of them at my house with BPQ 32. Man what a lot of rf packet racket doing link tests.....
                     
                    Just wondering as this is my first time as a sysop sorta kinda......
                     
                    Bill K7MT

                  • John Wiseman
                    Oops - too early in the morning! I meant set timers either side of 180 - say 175, 180, 185 ... From: BPQ32@yahoogroups.com [mailto:BPQ32@yahoogroups.com] On
                    Message 9 of 10 , Dec 3, 2010
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                      Message
                      Oops - too early in the morning! I meant set timers either side of 180 - say 175, 180, 185
                       
                       
                      -----Original Message-----
                      From: BPQ32@yahoogroups.com [mailto:BPQ32@yahoogroups.com] On Behalf Of John Wiseman
                      Sent: 03 December 2010 09:57
                      To: BPQ32@yahoogroups.com
                      Subject: RE: [BPQ32] Link Timer question ?

                       

                      Bill
                       
                      The  node normally keeps a link open to each NETROM neighbour. This ensures that nodes are actually reachable - you can get routing problems if you hear nodes that can't hear you.
                       
                      In your situation of 5 nodes on one frequency, the overhead of this may be too much. The real answer is a better network design, but you can turin off the link verification by adding
                       
                      NOKEEPALIVES=1

                      to the PORT configuration of yout RF port. You will then only open up links to nodes when you have traffic to pass.

                      You can fiddle with the link verification timer, but this is there to make sure failed links are detected, so I wouldn't recommend running at much more than the standard 180 seconds. Sometimes you will see both ends of the link sending a verification poll (RR P) at the same time, doubling the overhead. If this happens set the timer at each node to a slightly different value - say 290, 295, 300, etc..

                      With 5 nodes on a 1200 bps channel you will also need to manage the NODES broadcasts carefully to avoid filling the channel with NODES broadcasts.

                      73,

                      John

                       

                       

                       

                       

                       

                       

                      -----Original Message-----
                      From: BPQ32@yahoogroups.com [mailto:BPQ32@yahoogroups.com] On Behalf Of Bill Erhardt
                      Sent: 03 December 2010 03:06
                      To: BPQ32@yahoogroups.com
                      Subject: [BPQ32] Link Timer question ?

                       

                      Howdy from Bill,
                       
                      After watching all this run now for a couple days, I asked myself why is the link timer pinging every two minutes. Can I set it to say 5 minutes and stop some of the extra RF traffic out there.
                       
                      The X1J4 nodes are also set to two minutes and they are just pinging like heck out here.  I know there are like 4 and I am now the 5th Node all within hearing distance of each other and maybe this is a problem There are 4 X1J4 on Mountain Tops all within 40 miles of each other and I can hear all 4 of them at my house with BPQ 32. Man what a lot of rf packet racket doing link tests.....
                       
                      Just wondering as this is my first time as a sysop sorta kinda......
                       
                      Bill K7MT

                    • Bill Erhardt
                      Hi Gang, Thanks for all the great information. I will study up on thi area and learn. You have given me to push to try and better understand and how to
                      Message 10 of 10 , Dec 3, 2010
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                        Hi Gang,
                         
                        Thanks for all the great information.  I will study up on thi area and learn.  You have given me to push to try and better understand and how to experiement.
                         
                        John, your right in that my station radio is a Kantronics DVR 2-2 on packet BPQ node and also on APRS as my station is on solar. The nodes out there are 25 watts DR-1200t and GE Phoenix;s at 8000 feet. I am at a disadvantage with 2 watts. Hearing a lot but not sure they are hearing me...
                         
                        Thanks gang and Happy Holidze.  Still having loads of fun learning on this geat adventure.  The few headaches are just a minor inconvience..
                         
                        Bill K7MT
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