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Beginner

Nexus 5548P linkFlapErrDisabled

I am getting a linkFlapErrDisabled on a link connected to a Fujitsu RX200 with an Intel® 10 Gigabit XF SR Server Adapter attached.. I have manually set the duplex to full and speed to 10000... Connection is an access mode connection. I have tried everything I can think of but no help.

Any suggestions as to what I can check on Nexus 5548P to ensure that the switch configuration is good?

interface Ethernet1/19

  switchport access vlan 8

  duplex full

Also FYI, server guy is checking for an updated version for the Intel® 10 Gigabit XF SR Server Adapter driver.

Thanks in advance.

1 ACCEPTED SOLUTION

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Link flap error is due to the

Link flap error is due to the link going up/down continually..Mostly its a L1 issue and may not have anything to do with configuration. Please check, cables, SFP etc on both sides to ensure no physical layer issues, If patch panel is involved you need to check that as well.

Madhu

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11 REPLIES 11
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Link flap error is due to the

Link flap error is due to the link going up/down continually..Mostly its a L1 issue and may not have anything to do with configuration. Please check, cables, SFP etc on both sides to ensure no physical layer issues, If patch panel is involved you need to check that as well.

Madhu

View solution in original post

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Beginner

SFP is a CISCO 10Gbase-SR...

SFP is a CISCO 10Gbase-SR... Not sure what type is on server but I do know it is an SR type. Going to replace fiber cable in a bit just to check it.

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Participant

Hi

Hi

As far as I know there is a special cable to be used for Fujitsu server. Previously I heard from one of my xcolleagues got the same issue.

 

Thanks

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Beginner

Check cabling -- Good

Check cabling -- Good

Swap SFP on Cisco -- Done

Check connectivity  -- BAD.. 

All L1  checked and still flapping... 

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Beginner

Re: Check cabling -- Good

make sure the interface is not part of a port-channel aggregation.  Try other ports. 

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Beginner

Intel firmware and driver

Intel firmware and driver updated.. Still flapping. The interface on server keeps displaying "identifying" but never succeeds.

We have tried to different SFPs (Cisco-Finisar and Cisco-AVAGO)..

Any ideas?

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Hello Jeff,

Hello Jeff,

Please identify which side is having problem Nexus or Server. Try moving the connection to another port on the switch or another Switch? If the issue still remains, server team needs to figure it out. But if it comes up on another port or another similar switch, a possible faulty port on 5K.

Thanks,

Madhu.

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Beginner

This done during testing and

This done during testing and issue was still there no matter what port we used on switch. I will change this "answered" so it is not on the issues.. I do believe it is a server/card issue.

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Alright Jeff,

Alright Jeff,

Contact us back if you need any help at a later stage.

Thanks,

Madhu

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Beginner

Re: Link flap error is due to the

For me shutdown and no shutdown worked

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Beginner

Re: Link flap error is due to the

Ran into the linkFlapErrDisabled on a Nexus 7K and found that the XFP on the other end of the link (Nexus 5K) had a high current alarm condition.
Swapping out the defective XFP cleared the high current alarm, restored the link, and solved the issue.


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