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Cisco Bug: CSCum17923 - N5K/N6K should not send ELS_RSCN upon mgmt port changes on connected MDS

Last Modified

Aug 08, 2018

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

5.2(1)N1(6) 6.0(2)N2(1)

Description (partial)

Symptom:
In a scenario like the following:

   mds ------- n5k ------ end device

when you make config changes on int mgmt0 of the mds switch, the mds sends a SW_RSCN to n5k and the n5k in turn sends an ELS_RSCN to end devices. That ELS_RSCN may trigger a logout of the end device from the fabric.

Also, when the mgmt port of the n5k itself changes, the n5k sends ELS_RSCNs to end devices, which again may trigger a log out from the fabric.

Conditions:
Applies to the following platforms only : Nexus 5500, Nexus 5600 and Nexus 6000 switches
Applies to the following NXOS versions	: 5.2(1)N1(6) and later and 6.0(2)N2(1) and later

N5K/N6K is in switching mode (non NPV mode).
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Bug Details Include

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