INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Cisco 2960x SFP+ Won't Link

Cisco 2960x SFP+ Won't Link

(OP)
I'm doing a network upgrade and installing Cisco 2960x switches. I'm trying to use the 10GB SPF+ ports running over MulitMode fiber. I can't figure out why I can't get the SFP+ modules to link up. The distance is not more then 500' I know the fiber pairs work because the existing switches work over those same pairs.

Any help would be appreciated.

Thanks

RE: Cisco 2960x SFP+ Won't Link

What's the exact part number on the SFPs you are using?

RE: Cisco 2960x SFP+ Won't Link

(OP)
it's a thrid party module SFP+ 10G from antaira

RE: Cisco 2960x SFP+ Won't Link

the specs on it say they are only rated up to 300m and you said you are no more than 500 so you are over the specs.
Make sure that the switch recognizes them and that the ports are not shutdown. Other than that you need to look on the sfp side and not the cisco switch. As I said you are probably over the supported specs and they signal is not strong enough.

RE: Cisco 2960x SFP+ Won't Link

(OP)
I'm right around 500' feet not meters so I can't be over the specs.

RE: Cisco 2960x SFP+ Won't Link

Yeah, I realized that after I send the response but didn't get a chance to get back until now.
Does the switch recognize the SFPs? Did you check to make sure they are not shut down?
Do you get any connection lights when you connect the fiber cables?
Have you tried reversing one end?

RE: Cisco 2960x SFP+ Won't Link

(OP)
You know,,,, it's always the simple things. I should have known better to reverse one end. The problem is that most fiber patch cables now a days come with a plastic piece around it so it stops you from reversing the ends unless you take that piece off. in the past I would always reverse the ends... go figure.

Thanks for pointing that out for me.

Appreciate it.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close