How do I connect to the console on my Cisco ISR1100X router?

May 7, 2025 4 answers
Asked by TechWhiz87
I recently got a Cisco ISR1100X router but I'm having trouble connecting to its console using my Windows laptop and a serial to RJ45 cable. When I try using Putty, I just see a cursor in the upper left corner and can't get any response from the router. Can anyone help me figure this out? Thanks!

Answers

RouterNerd99
Make sure to check the Cisco documentation for the ISR 1100 series for connection requirements. Also, ensure that your Putty serial settings match what's listed in the guide. Itโ€™s important to use a console rollover cable instead of a regular Ethernet cable.
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HelpMeOutHere
Alternatively, if you're really stuck, you could consider hiring someone with more experience to help you with the setup.
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GadgetGuru42
It sounds like the serial to RJ45 setup isnโ€™t going to work the way you think. You need a USB to serial adapter for your laptop instead. Go check your device manager to see which COM port is assigned (like COM1). Youโ€™ll want to use that port in Putty to connect properly.
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LinkMaster3000
Here's a resource that might be helpful for your issue: [Cisco White Paper](https://www.cisco.com/c/en/us/products/collateral/routers/829-industrial-router/white-paper-c11-743674.html). It might have the details you need.
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