cucm and IMP upgrade recommended steps?

[baselzind]

i have :

2xcucm version  "10.5.1.10000-7"

2xIMP version    " 10.5.1.10000-9"

2xcuc version    "10.5.1.10000-7"

vcs-control X8.6.1

vcs-expressway X8.6.1

i plan to upgrade the cucm to 10.5.2su3 and the IMP to 10.5.2su2 but as i have both of each cucm and IMP im not clear on the recommended steps with multiple nodes

1-a colleague has recommended after i upgrade the cucm publisher to not restart it and to move to the cucm subscriber and upgrade it then restart both , is this correct???

2-my colleague aslo recommended that i do the same for IMP upgrade , as to upgrade the publisher first and not to restart it , then upgrade the subscriber then restart both???

3-or is it recommended to shut the subscriber down while upgrading the publisher and vice versa to the subscriber?

4-while upgrading the cucm publisher or subscriber , will they be out of service?

[Suresh Hudda · Accepted solution]

1-a colleague has recommended after i upgrade the cucm publisher to not restart it and to move to the cucm subscriber and upgrade it then restart both , is this correct???  ----> Yes, it's correct. You can upgrade the CUCM-IMPcluster to 10.5.2 in low peak hours and then in downtime window you can switch version & restart them.

2-my colleague aslo recommended that i do the same for IMP upgrade , as to upgrade the publisher first and not to restart it , then upgrade the subscriber then restart both??? ----> Yes

3-or is it recommended to shut the subscriber down while upgrading the publisher and vice versa to the subscriber?  ---> No, don't need to shutdown any node/subscriber while upgrading.

4-while upgrading the cucm publisher or subscriber , will they be out of service? --> No, as this is minor version upgrade so nothing will be out of service during upgrade. But, during switch version cluster will restart so IP phones will reboot couple of times.

Suresh 

[baselzind]

thank you for the response , as this is my first time doing this , let us assume i dont switch to the new version and restart immediatley , when i restart it later will it switch automatically to the new version or do i need to issue the switch command to the new version (if so how?) and then restart?

[Suresh Hudda]

By simply restarting node it will node switch, you need to switch the version manually(if you choose DO not reboot after upgrade while upgrading).

Suresh

[baselzind]

yes my question how do i switch the version manually if i choose not to reboot after the upgrade? where do i go in the cucm and IMP?

[Suresh Hudda · Accepted solution]

Go to OS admin page, then go to settings then click on version; here you will get switch version button.

Suresh

[Manish Gogna]

In the CLI of Publisher first run this command:

utis system switch-version

Once it is finished then run the same command on the subscribers.

Do it for cucm first and then do for IM&P.

HTH

Manish

[baselzind]

also regarding upgrading cucm and imp ,

-should i upgrade and restart both cucm first then move to the imp and upgrade them and restart them?

-or should i upgrade both cucm and both imp then restart all of them" on a further note can i restart all the server at once or should i wait for each server to come up fully?"

[Suresh Hudda]

You can upgrade first CUCM and then IM & Presence then start switch version from CUCM Pub and let it come up fully then proceed to switch version on next nodes (cucm sub, IMP Primary & then IM Sec) one by one.

Imp Note: You must switch version CUCM before you switch IM and Presence. 

Please go through below 10.x upgrade guide as well for more information/understanding.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/upgrade/10_0_1/CUCM_BK_U4214F9D_00_upgrade-guide-cucm-100/CUCM_BK_U4214F9D_00_upgrade-guide-cucm-100_chapter_0100.html#CUCM_RF_UA673442_00

Suresh

[baselzind]

loading the upgrade into the four server took me very long time almost 4 hours , is it possible to postpone the switch to the new version after i installed it for a week or not? would the cucm and imp function normally during the week?

[Suresh Hudda]

Yes, you can do switch version in next maintenance window, there will be no issue.

Suresh

[Jaime Valencia]

As long as you understand that any changes made between the time you finished the upgrade, and you do the switch will be lost, yes, you can do that.