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)
Workaround
1) Reconfigure the same commands on effected ports and then remove it as indicated below:
configure terminal
interface e1/17
storm-control broadcast level pps 0
storm-control multicast level pps 0
storm-control unicast level pps 0
switchport virtual-ethernet-bridge
config t
int eth 1/17
no storm-control broadcast level pps 0
no storm-control multicast level pps 0
no storm-control unicast level pps 0
no switchport virtual-ethernet-bridge
2) Write erase and reapply the original configurations.
3) This option is ONLY applicable while still running 7.0(3)I7(7).
Install and activate SMU prior to proceeding with non-disruptive ISSU to 7.0(3)I7(8).
SMU is named nxos.CSCvu20429-n9k_ALL-1.0.0-7.0.3.I7.7.lib32_n9000.
After non-disruptive upgrade to 7.0(3)I7(8) has been completed, SMU will become inactive and can be removed through .
Further Problem Description
