I need Help

barquerabarquera Member Posts: 21 ■□□□□□□□□□
Hi Everyone,

I have a Catalyst 2360 with an SFP-10G-LR connected to a fiber patch panel.
On the other side I have a Nexus 7000 with an SFP-10G-LR connected to a fiber patch panel.
I cannot get a link light on the 2360 or the Nexus 7000.
Both Fiber patch cables are Singlemode. Fiber between locations is Singlemode. Both ports are enabled but showing as not connected.

2360 port config:
interface TenGigabitEthernet0/1
description Core 7010 (eth3/9)
switchport trunk native vlan 980
switchport trunk allowed vlan 200,390,801
switchport mode trunk
switchport nonegotiate
storm-control broadcast level 5.00
storm-control action trap

Nexus 7000 config:
interface Ethernet3/9
description L2 Switch (Eth3/9)
switchport mode trunk
switchport trunk native vlan 980
switchport trunk allowed vlan 200,390,801
spanning-tree port type normal
spanning-tree guard root
logging event port link-status
logging event port trunk-status
storm-control broadcast level 5
storm-control multicast level 5

Note: I set this up in another location here at work but all the cables were Multimode Fiber and the SFP's were SFP-10G-SR. This setup works with no problem using the same above configs.

Scratching my head on this one because it just seems like its a simple Layer 1 problem. Any assistance would be greatly appreciated.


  • barquerabarquera Member Posts: 21 ■□□□□□□□□□
    Turns out that one of the brand new fiber patch cables was bad right out of the bag.
    I worked on this for like 7 hours.
    My buddy starts his shift and figures it out in 20 minutes.

  • networker050184networker050184 Mod Posts: 11,962 Mod
    That was going to be my first guess. Start looping it out and find the fault. Always start at the physical layer and work your way up. Save some valuable time.
    An expert is a man who has made all the mistakes which can be made.
  • ITdudeITdude Member Posts: 1,181 ■■■□□□□□□□
    Yea, I was just about to quote the words of a double CCIE friend of mine, that has been permanently ingrained in my head, since day one : Always start at Layer 1 and work you way up the ladder, it will usually save you a heck of a lot of time!"icon_wink.gif

    Lesson learned:)
    I usually hang out on (FF02::A) and (FF02::5) when I'm in a non-proprietary mood.

    Simplicity is the ultimate sophistication.
    (Leonardo da Vinci)
  • TesseracTTesseracT Member Posts: 167
    Doh! You've got to hate that
  • sides14sides14 Member Posts: 113
    Good learning experience. A similar issue won't catch you in the future (probably).
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