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Cisco Bug: CSCvu20429 - Storm control commands broadcast/multicast added to interface configs after non-disruptive ISSU

Last Modified

Oct 07, 2020

Products (52)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 3548-XL Switch
  • Cisco Nexus 92160YC-X Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 92304QC Switch
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Known Affected Releases

7.0(3)I7(8)

Description (partial)

Symptom:
After multiple non disruptive ISSUs, the following commands were added to the interface configuration causing  connectivity issues.

For instance, non-disruptive ISSU was performed as below versions and all L2/L3 interfaces were added with the following commands.

I7.0(3)I4(1) > 7.0(3)I7(7)> 7.0(3)I7(8)

interface Ethernet1/17
  link transmit reset-skip  <- added after the upgrade
  no link dfe adaptive-tuning  <- added after the upgrade
  storm-control broadcast level pps 0  <- added after the upgrade
  storm-control multicast level pps 0 <- added after the upgrade
  storm-control unicast level pps 0   <- added after the upgrade
  switchport virtual-ethernet-bridge <- added after the upgrade

Conditions:
Multihop Non disruptive ISSU which includes 7.0(3)I7(7) as intermediate step to 7.0(3)I7(8) or 9.3(4)
For eg
7.0(3)I4(7) --> 7.0(3)I7(7) --> 7.0(3)I7(8)
7.0(3)I4(7) --> 7.0(3)I7(7) --> 9.3(4)
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