Recovering from a Stack Unit Configuration Mismatch
When a configuration mismatch occurs, the active controller logs and displays a configuration mismatch message and puts the mismatched unit into a non-operational state. In the following example, the original stack unit 3 has failed, and a replacement unit has been installed that does not match the configuration of the original unit. You should see the following message.
Warning! put stack unit 3 to non-operational reason= config mismatch
Complete the following steps to recover from a configuration mismatch.
- Enter the
show stackcommand to see the status of the stack, and theshow running-configcommand to see the configurations of the stack units.Samples in this section must be replaced with samples from a model other than the ICX 7750.ICX7750-26Q Router# show stack T=1h38m40.5: alone: standalone, D: dynamic cfg, S: static ID Type Role Mac Address Pri State Comment 1 S ICX7750-26QXG active 748e.f8f9.6300 0 local Ready 2 D ICX7750-26QXG member cc4e.2438.7280 0 remote Ready 3 S ICX7750-26QXG member cc4e.2438.7500 0 remote NON-OP: config mismatch ICX7750-26Q Router# show running-config Current configuration: ! ver 08.0.90 ! stack unit 1 module 1 icx7750-20-qxg-port-management-module module 2 icx7750-qsfp-6port-qsfp-240g-module module 3 icx7750-6q-6port-qsfp-240g-module stack-trunk 1/2/1 to 1/2/2 stack-trunk 1/2/4 to 1/2/6 stack unit 2 module 1 icx7750-20-qxg-port-management-module module 2 icx7750-qsfp-6port-qsfp-240g-module module 3 icx7750-6q-6port-qsfp-240g-module stack-port 2/2/1 stack-trunk 2/2/4 to 2/2/5 stack unit 3 module 1 icx7750-48-xgc-port-management-module module 2 icx7750-qsfp-6port-qsfp-240g-module stack-port 3/2/1 stack-port 3/2/4 stack enable stack mac 748e.f8f9.6300 ! - To resolve the mismatch, you must remove the configuration for stack unit 3. Use
the
no stack unitcommand in configuration mode.This removes configuration related to unit 3.
If you are unable to remove the configuration because of a multi-slot trunk configuration or other configuration identified by system output, you must first manually remove the problem configuration.
When you have successfully deleted the mismatched stack unit, a re-election is triggered, and the active controller learns the correct module configuration from the standby controller or from other stack members. No reload is required.