Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

I can not connect my catalys 3750 to other switch to expand my network

I was trying to connect my switch to a port on the first level of the building but it does not connect to other switch on second level and the port's led keep the ambar color blinking
Cisco Employee

An orange light on switch

An orange light on switch means that the port is administratively down, i.e. disabled. It might be down due to Spanning Tree also. Basically, there is something misconfigured in your switch. You should check following :

1. A swicth connecting to other switch should be in trunk mode.
2. Make sure the speed, duplex and other parameters are configured properly. You can set to auto negotiations and all.
3. You should share show run <interface_number> and show ip int brief output to show what is the status when it is amber.

4. You can check by connecting a PC on the switch to see if that works properly.

Ideally it will be good to post this question to CSC Switching community to attract more expert on these issues, here :



**Encourage Contributors. RATE them. **

-Thanks Vinod **Rating Encourages contributors, and its really free. **