Overclock.net › Forums › Software, Programming and Coding › Networking & Security › Serial Console Management - Problems
New Posts  All Forums:Forum Nav:

Serial Console Management - Problems

post #1 of 14
Thread Starter 
Hello all,

Received two management switches both seem to be unresponsive via a serial link. Using Tera Term for this.

What I've tried:
Physical and logical loopback on the serial port (local echo and loopback via the physical pins (it's a IDC10 to serial DB9 bracket))
Changing Baud rate, default for this switch is 19200, also tried lowering the receive and transmit buffer
Tried both a straight-through and NULL modem cable
Tried every terminal IDs as it wasn't listed in the documentation, however my other switch is VT100 which Tera Term supports
Attempted Telnet using the default IP settings on both switches... to no avail, which is extremely odd, should at least connect


So, my only suspicion is that I have in fact received another straight-through RS232 DB9 serial cable, which won't work. Both devices (serial port -> switch) are DTEs for data communication.


Any suggestions, in case I have missed something?

Thanks,
post #2 of 14
What switches?

Sounds like either bad switches... or bad cable / port / software settings.

I haven't used Tera-term, usually just use Putty. Am assuming you have Tera-term set to correct com port (have to ask... have seen it too often)?

Are these new switches? Used (if used, Telnet could be turned off). Anyway to hardware reset the firmware?
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
post #3 of 14
Thread Starter 
Hi,

I have both a LevelOne GSW-2690 switch and a 3COM SuperStack 3 Switch 4400.

I thought maybe bad switches but I can't possibly imagine how they would be. The seller on eBay has a very high reputation and apparently every switch has been tested.

I was thinking maybe the cable, got another one on the way, but it's a bit odd why. Port wise everything seems fine, also tried setting baud rate same as the switch's default to no avail.

Yeah it's the correct COM port tongue.gif

EDIT: Yeah I was thinking Telnet has been switched off too. They are used. I don't see any other way to reset the firmware unfortunately.
Edited by mikeo01 - 4/9/14 at 8:00am
post #4 of 14
Quote:
Originally Posted by mikeo01 View Post

Hi,

I have both a LevelOne GSW-2690 switch and a 3COM SuperStack 3 Switch 4400.

I thought maybe bad switches but I can't possibly imagine how they would be. The seller on eBay has a very high reputation and apparently every switch has been tested.

I was thinking maybe the cable, got another one on the way, but it's a bit odd why. Port wise everything seems fine, also tried setting baud rate same as the switch's default to no avail.

Yeah it's the correct COM port tongue.gif

Had to ask! lol! Pop an email to the seller... ask what they did to get them talking? Another cable is always a good idea to try.

Have you tried connecting via a lan / management port instead of the serial? If http management is setup already, that might work.

I assume you have manuals? If not:

Level one GSW-2690 :http://download.level1.com/level1/manual/GSW-2690%28EN%29.pdf States NULL MODEM cable is needed

Goodies: http://uk.level1.com/downloads.php?modelstr1=GSW&modelstr2=2690&sendtype=0

3com SuperStack 4400: http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c02583591-1.pdf States NULL MODEM cable is needed

Goodies: https://h10145.www1.hp.com/Downloads/SoftwareReleases.aspx?ProductNumber=JE879A&lang=en&cc=us&prodSeriesId=4236660


Sorry I can't be more help... biggrin.gif
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
post #5 of 14
Thread Starter 
The switches do have web based management however their default IPs won't work. I threw Wireshark on to see if I can find any information, but to no avail.

Also the serial is the management port, still using old RS232 tongue.gif

Thanks for the links, I have those bookmarked and had a look through them unfortunately frown.gif

The seller simply used Hyperterminal in order to erase it's startup configuration, so it should be clear.

Thanks for the help thumb.gif just fingers crossed it's the darn cable. I know listings on eBay tend to list one thing as something completely different tongue.gif
post #6 of 14
Quote:
Originally Posted by mikeo01 View Post

The switches do have web based management however their default IPs won't work. I threw Wireshark on to see if I can find any information, but to no avail.

Also the serial is the management port, still using old RS232 tongue.gif

Thanks for the links, I have those bookmarked and had a look through them unfortunately frown.gif

The seller simply used Hyperterminal in order to erase it's startup configuration, so it should be clear.

Thanks for the help thumb.gif just fingers crossed it's the darn cable. I know listings on eBay tend to list one thing as something completely different tongue.gif

I know this is probably a silly question... but you said default IP's? If they are using static default IP's, you did set a static IP on your box to the same subnet, right?

If they are using DHCP, can your router / DHCP server see them?
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
post #7 of 14
Thread Starter 
The manual states default IP addressing for the web based management, however by the looks of it they probably erased them.

Yeah tried out the IP address for accessing it, no luck frown.gif no DHCP on the switch either, would of been picked up unfortunately.


I think I've gone through most of it but it seems strange to me that both switches would be deemed faulty, so that's why I am blaming the cables tongue.gif always blame the cables! ha
post #8 of 14
Quote:
Originally Posted by mikeo01 View Post

The manual states default IP addressing for the web based management, however by the looks of it they probably erased them.

Yeah tried out the IP address for accessing it, no luck frown.gif no DHCP on the switch either, would of been picked up unfortunately.


I think I've gone through most of it but it seems strange to me that both switches would be deemed faulty, so that's why I am blaming the cables tongue.gif always blame the cables! ha

Yep! thumb.gif That is all I have.... good luck! Let me know what you find...
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
post #9 of 14
I've never seen a default that high they are normally 9600.

Sent from my XT1049 using Tapatalk
Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
Audio
Plantronics Gamecom 788 
  hide details  
Reply
Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
Audio
Plantronics Gamecom 788 
  hide details  
Reply
post #10 of 14
Quote:
Originally Posted by beers View Post

I've never seen a default that high they are normally 9600.

Sent from my XT1049 using Tapatalk

I agree.. but the Level 3 manual shows a baud rate of 57600, believe it or not! (Page 17)

and the 3com shows 19200 (page 44)

I checked that earlier, because that can be an issue....
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Networking & Security
Overclock.net › Forums › Software, Programming and Coding › Networking & Security › Serial Console Management - Problems