• Status: Solved
  • Priority: Low
  • Security: Public
  • Views: 37
  • Last Modified:

Fiber connection setup between Cisco switches

HI all,

I'm trying to setup a fiber connection between 3 Cisco switches. but I can't seems to get the uplinks to work, now i'm working if I
have the correct hardware to do this:

My setup:

Main Switch:
1x  Cisco Switch Catalyst 2960 X Series (WS-C2960X-48LPS-L V04)

Other Switches:
2x  Cisco Switch Catalyst 2960 Plus Series POE (WS-C2960+24PC-M V02)

I have 4 x  Cisco GLC-LH-SMD - 10-2625-01 Transceivers and about 80 meter (12 fiber) Outdoor - A-DQ(ZN)B2Y - 9/125 OS 2 - Connector A:
LC/pc  - Connector B: LC/pc cable.

Can anyone verify that this setup is correct?
  • 2
  • 2
1 Solution
Sam Simon NasserIT Support ProfessionalCommented:
can you paste  here the SHOW RUN  command on each switch?
do you have VLAN? trunking? when you connect two switches, does the SFP light turn green on both sides?
atlas_shudderedSr. Network EngineerCommented:
Your fiber and sfp's are both single mode so you should be good there.

On the fiber and sfp's, set the sfp port to enable and confirm that you can see light in the sfp.

next, connect the fiber to the sfp and confirm you can see light on the far end.

next, confirm you can see light on the far end sfp after you have set the port to enable

If you see light in all three places, confirm your polarity on the fiber is correct.  This is a common issue with fiber connections.  The LC connector you are using will permit you to pop the individual fiber strands out of the saddle and swap them to change polarity.

One last thing, on the switches, confirm that both that neither of the 1G or 10G in admin shutdown.  There are versions of the IOS that if one is up and the other is admin down, the port will not come up.
Sam Simon NasserIT Support ProfessionalCommented:
also, i faced this once: on the fiber patch cable that connect the switch to the SFP, try to reverse the cable head colors! if the cable patch head left side is red and the right is black, reverse them (left side is black and the right is red). this usually work.
atlas_shudderedSr. Network EngineerCommented:
Question seems abandoned.  Asker has not replied on a status or with any of the information requested by participants.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get Certified for a Job in Cybersecurity

Want an exciting career in an emerging field? Earn your MS in Cybersecurity and get certified in ethical hacking or computer forensic investigation. WGU’s MSCSIA degree program was designed to meet the most recent U.S. Department of Homeland Security (DHS) and NSA guidelines.  

  • 2
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now