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Cisco Bug: CSCur15997 - Need UDLD support added to the ACI leaf switches

Last Modified

Dec 06, 2019

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases


Description (partial)

When N9K ACI leaf switch is connected to an L2 device that supports UDLD, there is no neighbor discovery between the ACI leaf and the L2 device.  This is because UDLD is not incorporated into the ACI switch code.

ACI leaf switch attached to an external L2 device that has UDLD enabled.

Related Community Discussions

Support of UDLD protocol in ACI environment
Hello Guy, This morning we tried to set up SPAN session on one of our borderleaves (N9K-C93180YC-EX) from eth 1/5 (src) to eth 1/24 (dst) Eth1/5 is one of our L3OUT and Eth1/24 is connected to a WS-C6503-E (cisco) Ten 3/1 We set up the span session according to cisco documentation and demonstration on Aci side ( The port stayed "not connected" on eth1/24 and we looked in the log file :   %UDLD-SP-4-UDLD_PORT_DISABLED: UDLD disabled interface Te3/1, unidirectional ...
Latest activity: Jul 28, 2017
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