CAT 9500 ISSU failure due to mismatch commands

[Balaji_50982]

Hi All ,

During the ISSU upgrade we may encounter the below error,

STAGE 1: Installing software on Standby
===================================================
--- Starting install_remote ---
[2] install_remote package(s) on chassis 2/R0
WARNING: Found 3137 disjoint TDL objects.
[2] Finished install_remote on chassis 2/R0
install_remote: Passed on [2/R0]
Finished install_remote

STAGE 2: Restarting Standby
===================================================
--- Starting standby reload ---
Finished standby reload

--- Starting wait for Standby to reach terminal redundancy state ---
Finished wait for Standby to reach terminal redundancy state

ERROR: MCL-Terminating the current ISSU Operation. ISSU Abort operation is initiated
ERROR: Once ISSU abort is done please check full list of mismatched commands via:
ERROR: show redundancy config-sync failures historic mcl
ERROR: install_add_activate_commit  exit(2 ) 

>>> Verify the mismatched commands on the switch<<<<

CORE_SW_01#show redundancy config-sync failures historic mcl
Mismatched Command List
-----------------------
-snmp-server enable traps license   

This is due to the target state software would have deprecated the commands

So we need to remove the above command "snmp-server enable traps license  " and save the config , then retry the ISSU upgrade.

CORE_SW_01# config t

CORE_SW_01(config)# no snmp-server enable traps license

CORE_SW_01(config)#exit

CORE_SW_01#write mem

After removing the command then retry ISSU and it should be successful.

####__Always refer the "configuration guide" for any "restriction and guidelines "  and the "release notes" for the "Hardware and Software Behavior Changes" before the upgrade__####

For example :

1) Configuration guide" for any "restriction and guidelines

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/17-12/configuration_guide/ha/b_1712_ha_9500_cg/m9-179-issu-cg.html

Restrictions and Guidelines for Performing ISSU

• Upgrade to Cisco IOS XE Dublin 17.12.x from any prior release using ISSU may fail if the snmp-server enable traps license command is configured. Ensure that you remove the snmp-server enable traps license command from the configuration before starting an ISSU upgrade because the snmp-server enable traps license command has been removed from Cisco IOS XE Dublin 17.12.x.

 2)  Release notes for the "Hardware and Software Behavior Changes" 

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/17-11/release_notes/ol-17-11-9500/whats_new_in_cisco_ios_dublin_1711x.html#topic-rn-hw-and-sw-behavior-changes-17111.xml

[Leo Laohoo]

---

@Balaji_50982 wrote:

WARNING: Found 3137 disjoint TDL objects.​

---

Post the complete output to the following commands: 

dir
dir bootflash-2:

[amousel · Accepted solution]

Confirmed, after removing the command my ISSU upgrade was successful. Going from 17.09.04a to 17.12.04.