cisco 4507 gigabit int down line protocol down

5 pts.
Tags:
Cisco 4500
Cisco 4507
Cisco switches
Gigabit ethernet switches
hi can any one help with this i am setting up 4507 with fiber connections but int never comes up it says gigabit int down line protocol down

Answer Wiki

Thanks. We'll let you know when a new response is added.

This can be a little loaded, but…
If the switch is NEW, try interconnecting 2 of the ports on the 4507 to each other – and be aware that you MAY have to “dismantle” a fiber cable to swap the pairs to do so, depending on your terminations. Some SC-SC cables don’t have a plastic “carrier” to keep them together – I try to keep one of these around for testing. If it has the carrier, snap it off (don’t necessarily have to BREAK it), and swap left for right.

If LC, you probably DO have to pry it apart and put back one end in reverse order. Remember, fiber is just like Ethernet – connecting similar devices requires a crossed path somewhere, as one side of the connector transmits, and the other receives. Once you get the transciever link light on, then the interface should allow you to manipulate it (i.e. Etherchannel, trunk, etc).

This could also be a problem with LX to SX connectivity. The Cisco SFPs use colors to signify the difference. The blue-tabbed SFPs cannot connect to the black-tabbed SFPs and establish communication.

Discuss This Question:  

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when members answer or reply to this question.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

To follow this tag...

There was an error processing your information. Please try again later.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Thanks! We'll email you when relevant content is added and updated.

Following