Using the auto upgrade feature on the cisco catalyst 3850 Leading Cisco networking products distributor-3network.com

1. Using the Auto-Upgrade feature on the cisco Catalyst
3850
Introduction
There are a number of scenarios when you would need to introduce a new switch into an existing stack
of 3850 switches. One particular example is when a new switch is purchased to expand the number of
usable ports in the stack. To successfully add a new switch to a stack, you will need to ensure that the
same software version is running on the new switch. Prior to IOS-XE release 3.3.1, the only way to
ensure the versions matched was to stage the new switch prior to introducing it into the stack.
Prerequisites
The 3850, includes a feature called “Auto-Upgrade” which might be familiar if you are migrating from the
3750 series platform. The goal of this feature is to ensure that any newly added switch will automatically
be provisioned by the stack members with the running IOS-XE version.
** Auto-upgrade is disabled by default.
** Auto-upgrade is not available in bundle mode.
To utilize the “Auto-Upgrade” feature, you simply need to add the command “software auto-upgrade
enable” in the running configuration of the existing stack. This will ensure that any newly added stack
members will automatically be upgraded.
Configure
Once the switch is stacked and booted up, you will see a clear indication that there is a mismatch in
versions and the new member will not fully join the stack. If you watch the syslog as the switch is trying
to join, you will notice the “auto advise” feature will alert you that the newly added switch is running a
different software version and mode.
%STACKMGR-1-STACK_LINK_CHANGE: STANDBY: 1 stack-mgr: Stack port 2 on switch
1 is up (3850-Stack-1)
%STACKMGR-1-STACK_LINK_CHANGE: 2 stack-mgr: Stack port 1 on switch 2 is up
1

2. %STACKMGR-6-SWITCH_ADDED: 2 stack-mgr: Switch 3 has been added to the
stack.
%STACKMGR-6-SWITCH_ADDED: STANDBY:1 stack-mgr: Switch 3 has been added to
the stack. (3850-Stack-1)
%INSTALLER-6-AUTO_ADVISE_SW_INITIATED: 2 installer: Auto advise initiated
for switch 3
%INSTALLER-6-AUTO_ADVISE_SW: 2 installer: Switch 3 running bundled software
has been added
%INSTALLER-6-AUTO_ADVISE_SW: 2 installer: to the stack that is running
installed software.
%INSTALLER-6-AUTO_ADVISE_SW: 2 installer: The 'software auto-upgrade'
command can be used to
%INSTALLER-6-AUTO_ADVISE_SW: 2 installer: convert switch 3 to the installed
running mode by
%INSTALLER-6-AUTO_ADVISE_SW: 2 installer: installing its running software.
Once the newly joined member is fully booted, you can see that a mismatch has been detected.
3850-Stack#show switch
Switch/Stack Mac Address : 0c27.24cf.ab80 - Local Mac Address
Mac persistency wait time: Indefinite
H/W Current
Switch# Role Mac Address Priority Version State
------------------------------------------------------------
*1 Active 0c27.24cf.ab80 14 B0 Ready
2 Standby f41f.c238.a800 13 B0 Ready
3 Member b4e9.b0d3.6600 12 0 V-Mismatch
2

3. Enable the auto-upgrade feature
In global configuration mode, type the command “software auto-upgrade enable.” This will enable the
feature for any new switches that join the stack.
3850-Stack(config)#software auto-upgrade enable
3850-Stack(config)#end
You will now have to reload the newly added switch only, a full stack reload is not necessary. In my
case, the newly added switch is “switch 3” so I simply type “reload slot 3.” Remember that “slot”
designates the switch in the stack (slot 1 = switch 1)
3850-Stack#reload slot 3
Proceed with reload? [confirm]
%STACKMGR-1-RELOAD_REQUEST: 1 stack-mgr: Received reload request for switch
3, reason Reload Slot Command
%STACKMGR-1-STACK_LINK_CHANGE: 1 stack-mgr: Stack port 2 on switch 1 is
down
%STACKMGR-6-SWITCH_REMOVED: 1 stack-mgr: Switch 3 has been removed from the
stack.
%STACKMGR-1-STACK_LINK_CHANGE: STANDBY:2 stack-mgr: Stack port 1 on switch
2 is down (3850-Stack-2)
Starting SWITCH-DELETE sequence, switch 3
SWITCH-DELETE sequence complete, switch 3
%STACKMGR-6-SWITCH_REMOVED: STANDBY:2 stack-mgr: Switch 3 has been removed
from the stack. (3850-Stack-2)
Starting SWITCH-DELETE sequence, switch 3 (3850-Stack-2)
SWITCH-DELETE sequence complete, switch 3 (3850-Stack-2)
Wait a few minutes while the switch reloads in the background
%STACKMGR-1-STACK_LINK_CHANGE: 1 stack-mgr: Stack port 2 on switch 1 is up
3

4. 3850-Stack#
%STACKMGR-1-STACK_LINK_CHANGE: STANDBY:2 stack-mgr: Stack port 1 on switch
2 is up (3850-Stack-2)
3850-Stack#
%STACKMGR-6-SWITCH_ADDED: 1 stack-mgr: Switch 3 has been added to the
stack.
%STACKMGR-6-SWITCH_ADDED: STANDBY:2 stack-mgr: Switch 3 has been added to
the stack. (3850-Stack-2)
3850-Stack#
First we can see that it does the conversion from BUNDLE to INSTALL mode followed by a
reload.
%INSTALLER-6-AUTO_UPGRADE_SW_INITIATED: 1 installer: Auto upgrade initiated
for switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Converting switch 3 to installed
mode by
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: installing its running software
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Setting the boot var on switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Finished installing the running
software on switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Reloading switch 3 to boot in
installed mode
%STACKMGR-1-RELOAD_REQUEST: 1 stack-mgr: Received reload request for switch
3, reason Auto upgrade
%STACKMGR-1-STACK_LINK_CHANGE: 1 stack-mgr: Stack port 2 on switch 1 is
down
%STACKMGR-6-SWITCH_REMOVED: 1 stack-mgr: Switch 3 has been r
3850-Stack#emoved from the stack.
4

5. %STACKMGR-1-STACK_LINK_CHANGE: STANDBY:2 stack-mgr: Stack port 1 on switch
2 is down (3850-Stack-2)
Starting SWITCH-DELETE sequence, switch 3
SWITCH-DELETE sequence complete, switch 3
%STACKMGR-6-SWITCH_REMOVED: STANDBY:2 stack-mgr: Switch 3 has been removed
from the stack. (3850-Stack-2)
3850-Stack#
Starting SWITCH-DELETE sequence, switch 3 (3850-Stack-2)
SWITCH-DELETE sequence complete, switch 3 (3850-Stack-2)
Once it reboots, the upgrade will then continue
3850-Stack#
%INSTALLER-6-AUTO_UPGRADE_SW_INITIATED: 1 installer: Auto upgrade initiated
for switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Searching stack for software to
upgrade switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Found donor switch 1 to auto
upgrade switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Upgrading switch 3 with software
from switch 1
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Finished installing software on
switch 3
%INSTALLER-6-AUTO_UPGRADE_SW: 1 installer: Reloading switch 3 to complete
the auto upgrade
%STACKMGR-1-RELOAD_REQUEST: 1 stack-mgr: Received reload request for switch
3, reason Auto upgrade
%STACKMGR-1-STACK_LINK_CHANGE: 1 stack-mgr: Stack port 2 on switch 1 is
down
5

6. %STACKMGR-6-SWITCH_REMOVED: 1 stack-mgr: Switch 3 has been removed from the
stack.
%STACKMGR-1-STACK_LINK_CHANGE: STANDBY:2 stack-mgr: Stack por
3850-Stack#t 1 on switch 2 is down (3850-Stack-2)
Starting SWITCH-DELETE sequence, switch 3
SWITCH-DELETE sequence complete, switch 3
%STACKMGR-6-SWITCH_REMOVED: STANDBY:2 stack-mgr: Switch 3 has been removed
from the stack. (3850-Stack-2)
Another reload is automatically performed. Once the switch is booted back up, it will
successfully join the stack with the correct IOS-XE version and software mode.
%STACKMGR-6-SWITCH_ADDED: 1 stack-mgr: Switch 3 has been added to the
stack.
%STACKMGR-6-SWITCH_ADDED: STANDBY:2 stack-mgr: Switch 3 has been added to
the stack. (3850-Stack-2)
%STACKMGR-6-SWITCH_READY: STANDBY:2 stack-mgr: Switch 3 is ready. (3850-
Stack-2)
%STACKMGR-6-SWITCH_READY: 1 stack-mgr: Switch 3 is ready.
Starting SWITCH-ADD sequence, switch 3
%NGWC_USB_CONSOLE-6-CONFIG_ENABLE: Switch 3: Console media-type changed to
default
Starting SWITCH-ADD sequence, switch 3 (3850-Stack-2)
SWITCH-ADD sequence complete, switch 3 (3850-Stack-2)
SWITCH-ADD sequence complete, switch 3
Verify
6

7. 3850-Stack#show switch
Switch/Stack Mac Address : 0c27.24cf.ab80 - Local Mac Address
Mac persistency wait time: Indefinite
H/W Current
Switch# Role Mac Address Priority Version State
------------------------------------------------------------
*1 Active 0c27.24cf.ab80 14 B0 Ready
2 Standby f41f.c238.a800 13 B0 Ready
3 Member b4e9.b0d3.6600 12 B0 Ready
3850-Stack#show version
Switch Ports Model SW Version SW Image
Mode
------ ----- ----- ---------- ----------
----
* 1 56 WS-C3850-48P 03.03.01SE cat3k_caa-universalk9
INSTALL
2 56 WS-C3850-48P 03.03.01SE cat3k_caa-universalk9
INSTALL
3 56 WS-C3850-48P 03.03.01SE cat3k_caa-universalk9
INSTALL
It is referred from
http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3se/consolidated_guide/c
onfiguration_guide/b_consolidated_3850_3se_cg_chapter_01101101.html#con_1189959
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