The following example describes and illustrates a switchover scenario with one ICS.

Consider a setup where SUP1 is the Cisco StackWise Virtual active supervisor in Chassis 1, SUP2 is the ICS in Chassis 1, and SUP3 is the Cisco StackWise Virtual standby supervisor in Chassis 2. If SUP1 fails, the following changes occur:

• SUP1 which failed becomes the new ICS in the set up.

• SUP3 takes over as the new Cisco StackWise Virtual active supervisor.

• SUP2 completes booting and becomes the new Cisco StackWise Virtual standby supervisor.

The following example describes and illustrates a switchover scenario with two ICS.

Consider a setup where SUP1 is the Cisco StackWise Virtual active supervisor in Chassis 1, SUP2 is the ICS in Chassis 1, SUP3 is the Cisco StackWise Virtual standby supervisor in Chassis 2, and SUP4 is the ICS in Chassis 2. If SUP1 fails, the following changes occur:

• SUP1 which failed becomes the new ICS in Chassis 1.

• SUP3 takes over as the new Cisco StackWise Virtual active supervisor in Chassis 2.

• SUP2 completes booting and becomes the new Cisco StackWise Virtual standby supervisor in Chassis 1.

• SUP4 in Chassis 2 remains unchanged.

The following is an example of a 3-step ISSU in a Quad-Supervisor with RPR:

Device# install add file bootflash:<image.bin>
Device# install activate issu
Device# install commit

The following is an example of a 1-step ISSU in a Quad-Supervisor with RPR:

Device# install add file bootflash:<image.bin> activate issu commit

The figure below shows the Quad-Supervisor with RPR with 2 ICS before and after ISSU:

The figure below shows the Quad-Supervisor with RPR with 1 ICS installed in the chassis with the Cisco StackWise Virtual active supervisor before and after ISSU:

The figure below shows the Quad-Supervisor with RPR with 1 ICS installed in the chassis with the Cisco StackWise Virtual standby supervisor before and after ISSU:

When Quad-Supervisor with RPR is implemented, the outputs for some commands display information that denote the role of each supervisor in the chassis.

This section shows you how to identify which supervisor the output is referring to based on the naming convention.

The following table lists some filesystems and their naming convention for each supervisor in a Quad-Supervisor setup:

Other filesystems also follow the above naming convention for the different supervisors in a Quad-Supervisor setup.

The following is a sample output from the show file systems command run in privileged EXEC mode:

Device# show file systems
File Systems:

       Size(b)       Free(b)      Type  Flags  Prefixes
             -             -    opaque     rw   system:
             -             -    opaque     rw   tmpsys:
*  11250098176    7044366336      disk     rw   bootflash: flash:
   11250171904    2430599168      disk     rw   bootflash-2-0:
    1651314688             0      disk     rw   crashinfo:
    1651507200             0      disk     rw   crashinfo-2-0:
  236154740736  224072753152      disk     rw   disk0:
  236155043840  223982125056      disk     rw   disk0-2-0:
   16497074176   16379744256      disk     ro   webui:
             -             -    opaque     rw   null:
             -             -    opaque     ro   tar:
             -             -   network     rw   tftp:
      33554432      33476510     nvram     rw   nvram:
             -             -    opaque     wo   syslog:
             -             -   network     rw   rcp:
             -             -   network     rw   http:
             -             -   network     rw   ftp:
             -             -   network     rw   scp:
             -             -   network     rw   sftp:
             -             -   network     rw   https:
             -             -    opaque     ro   cns:
   11250171904    2516582400      disk     rw   bootflash-1-1:
    1651507200             0      disk     rw   crashinfo-1-1:
  236155043840  224073351168      disk     rw   disk0-1-1:
      33554432      33480606     nvram     rw   stby-nvram:
             -             -     nvram     rw   stby-rcsf:
   11250098176    2429427712      disk     rw   stby-bootflash:
    1651314688             0      disk     rw   stby-crashinfo:
  236154740736  223982034944      disk     rw   stby-disk0:
   11250171904    5734662144      disk     rw   bootflash-2-1:
    1651507200             0      disk     rw   crashinfo-2-1:
  236155043840  224073351168      disk     rw   disk0-2-1:
             -             -    opaque     rw   revrcsf: