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I'm trying to communicate to the console ports on several Cisco switches and routers. I my computers do not have a 9pin Dconnector that will connect to a standard Cisco console cable, and the Cisco devices do not have USB.
Since I couldn't connect using the console cable directly, I installed a dhcp server temporarily, then I accesses the leased ip address to my HP Procurve switch, changed the IP into a static one and accessed the switch terminal through a telnet connection. Afterward I stopped the dhcp server since I don't really need it any more. As far as I know, there's no way for the device to know when PuTTY opens the serial port; an Enter keypress would serve as a 'attention' message and you should receive a reply. Share improve this answer answered Jul 17 '10 at 14:04.
Therefore, I purchased a Belkin USB to DB9 converter for serial connections. It's nice because I can see LEDs light up on it when it transfers data (link, TX, RX).
This has worked for a while. I'm using a home built computer using an AMD Athlon II comptuer with four USB ports comming off the motherboard. It's running XP OS.
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Microsoft Windows XP
Professional
Version 2002
Putty Won't Open Serial Connection Video
Service Pack 3
Computer:
AMD Athlon II X3 435
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Processor
2.91GHz 1.75GB of RAM
Putty Won't Open Serial Connection On Iphone
This has been working for a year or so, and right in the middle of running it just stopped working and was hung. After that, when I use the Device Manager to list the 'Ports (COM & LPT)' it now only shows COM1 and LPT1.
I get the above error message when ever I use 'Putty' software to do the serial terminal emulation.
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Not sure if it was my Belkin device, Computer, or OS.
1) So I first tried rebooting the computer, with no success.
2) I tried connecting to another router with no change. Windows 10 tile creator download.
3) Next rebooted the orginal router, no change.
4) Rebooted the laptop, no change.
I searched the internet for this, and the best advice was to manually install the com port. I tried this, but it instead installed COM4 and COM5. I tried anyway, but uninstalled when done.
How does the COM3 port get built? Should it always show available, or does it build the interface when a device is plugged in?
Well, I haven't messed with it over the weekend, tried again today, and now it's working when I plugged in the belkin USB to Serial DB9 connector. It recognized the device and gave a 'bong' and it appeared. Therefore I susspect that it is built when the device is plugged in, and torn down when it is disconnected. Not sure why it's now working..but now i don't trust when it may go down of back up. I'm sure there is a logical explaination, but not any help from the MS OS...as usual.
Maybe the Belkin device is flakey, but unlikely due to the number of times I unplugged and replugged...not sure.
I then grabbed a Laptop running Windows 7 and connected to it's USB port, and running putty software, and it started working.
Then, in about 5 minutes, it hung up as well, and I could not see the COM3 Port.
Posted by2 years ago
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Update - using the serial connection option at the bottom on the left in the putty app wouldn't open anything, using the session option at the top and selecting serial and using the default COM1 worked perfectly. So since this post I was able to get the config reset, logged in, configured gig 0/1 as a basic trunk port connected to a netgear router and assigned my pc a static ip in the netgear and connected to a to the switch and obtained the static ip and can fully access the router through the switch so I am pretty stoked that that worked, next will be trying with an actual cisco router.
Hey you all - I am trying to open a serial port via putty to a Cisco switch and a cisco router, 2 devices wont open, when I click open I just get a ding and nothing. I have set Putty to com 1- 3 - 4 - 6 just to test different ports, I have made sure I am selecting the same port under device manager - ports com n lpt - properties - advanced - and you can set the port to whatever number you want, I have tried all of those ports on both ends of the cable and have tried two different console cables, and have tried a router and a switch. In both cases I am connected to the light blue console port and connected directed to the serial port of a an old lap[top. I am using recommended connection settings. If we were looking at the pc as being the problem, what driver should I look to update? What other ideas does anyone else have?
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