Linux, "dgrp: net receive: sent reset to node - improper window sequence" in ConnectPort TS8/16

Realport
, , ,
1

I get this message in /var/log/messages: “dgrp: net receive: Sent Reset to node D - Improper Window Sequence”.

I’m using:

  • ConnectPort TS16 and TS8
  • Digi RealPort driver version: 1.9-36
  • Firmware version: 2.18.0 (version 82001474_F 05/15/2015) and 2.19.0.2 (version 82001474_H 04/14/2016)
  • Linux Kernel 2.6.28.10

Issues:

  • With 2015 firmware version the message is more frequent, with 2016 firmware version the message is less frequent.
  • I lose communication with my device attached to the RealPort and his Serial Parameters change:

$ stty < /dev/ttyD3
speed 9600 baud; line = 0;
intr = M-^?; quit = M-^?; min = 1; time = 0;
-icrnl ixoff ixany -imaxbel
-opost -onlcr
-icanon -iexten -echo -echoctl -echoke

$ stty < /dev/ttyD3
speed 9600 baud; line = 0;
min = 1; time = 0;
-brkint -icrnl ixany -imaxbel
-opost -onlcr
-isig -icanon -iexten -echo -echoctl -echoke

When I upgrade to the latest Firmware version (2.19.1, Version 82001474_J 07/28/2016) I see no more the message: “Sent Reset to node D…”, but I still have the same problems, lose communication and change the tty parameters.

I use the same environment production with Port Server TS16 and TS8 devices and no problems, the issue only appears in New Connectport devices.

Thnks for your help!

2

I also see that drpd shutdown connection every 2 minutes and reconnects every 10 seconds. This is the log in /var/log/syslog:

$ grep drp /var/log/syslog
Aug 31 14:08:43 localhost drpd: drpd(D,10.10.10.252) Driver shutdown connection
Aug 31 14:08:53 localhost drpd: drpd(D,10.10.10.252) Connected to Server
Aug 31 14:11:15 localhost drpd: drpd(D,10.10.10.252) Driver shutdown connection
Aug 31 14:11:25 localhost drpd: drpd(D,10.10.10.252) Connected to Server
Aug 31 14:13:32 localhost drpd: drpd(D,10.10.10.252) Driver shutdown connection
Aug 31 14:13:42 localhost drpd: drpd(D,10.10.10.252) Connected to Server
Aug 31 14:14:14 localhost drpd: drpd(D,10.10.10.252) Driver shutdown connection
Aug 31 14:14:24 localhost drpd: drpd(D,10.10.10.252) Connected to Server

As I posted before, this behavior and messages aren’t when I put PortServer devices in my environment production, misbehaviour only occurs with ConnectPort devices, even with the latest driver and firmware version:

    Model: 	 	ConnectPort TS 8
Firmware: 	2.19.1   (Version 82001474_J 07/28/2016)
POST: 	 	1.1.3   (release_82001476_C)                
    
    Digi RealPort driver version: 1.9-36
3

Is the device on the local LAN? If not, please try implementing a WAN Link speed:

http://knowledge.digi.com/articles/Knowledge_Base_Article/What-does-the-RealPort-WAN-link-setting-do

http://knowledge.digi.com/articles/Knowledge_Base_Article/High-CPU-usage-is-observed-when-running-RealPort-over-WAN-connections-in-Linux