port in error disable due to UDLD empty echo on nexus 5k

[Vivek]

Hi Experts , 

we have network like , 2 x N5k is connected to 7k , there was module 1 was faulty module 1 faulty on N7k and after replace the module we are facing port down issue . 

Nexus 5k error logs is indicating ports down due to UDLD empty echo but on N7k side simply link failure error  , see below .

ON N5k 

2018 Mar 14 13:34:41 RNS-ASB-DC1-5NX1 %ETHPORT-2-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/3 is down (Error disabled. Reason:UDLD empty echo)

On N7k , 

2018 Mar 12 18:25:19 RNS-ASB-DC1-7NX1 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel10: first operational port changed from Ethernet2/2 to Ethernet2/1
2018 Mar 12 18:25:19 RNS-ASB-DC1-7NX1 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel10: Ethernet2/2 is down
2018 Mar 12 18:25:19 RNS-ASB-DC1-7NX1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet2/2 is down (Link failure)
2018 Mar 12 18:25:22 RNS-ASB-DC1-7NX1 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel10: first operational port changed from Ethernet2/1 to none
2018 Mar 12 18:25:22 RNS-ASB-DC1-7NX1 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel10: Ethernet2/1 is down
2018 Mar 12 18:25:22 RNS-ASB-DC1-7NX1 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel10 is down (No operational members)
2018 Mar 12 18:25:22 RNS-ASB-DC1-7NX1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet2/1 is down (Link failure)
2018 Mar 12 18:25:22 RNS-ASB-DC1-7NX1 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel10 is down (No operational members)

FYI : we have tried to shut no shut port , reset ports and cable test but no luck yet , 

i hope ,will get solution  . 

[jkilleda]

Hi Rajesh,

Just do the basic level troubleshooting first , check the ports as well , if it still doesn't work there might be a hardware issue or possibilities that there might be a bug .

There are certain commands in the below troubleshooting guides provided , run them on Nexus 7k and check the issue

https://www.cisco.com/c/en/us/support/docs/interfaces-modules/nexus-7000-m1-series-32-port-10-gigabit-ethernet-module/116227-technote-m132xp-00.html

https://www.cisco.com/c/en/us/support/docs/switches/nexus-7000-series-switches/118959-troubleshoot-hw-arch-nexus7000-00.html

[Vivek]

Hey hi , 

Thanks for your reply , we performed all troubleshooting level and now waiting for check on hardware and software side , i am strongly suspecting issue with software , like bug behavior . 

will update once i have solution for issue and again thanks for your help 

[jacob.torres@amway.com]

Any solution on this issue yet? Was it a bug? Was it hardware? I am facing this issue as well.

[Vivek]

Hi Jacob ,


There was issue with hardware , replaced the module on N5k side and after that issue resolved and everything working as expected ...