Supervisor Replacement Procedure for Cisco Modular IOS VSS

These steps explains the Supervisor Replacement Procedure for the VSS which runs Modular IOS:

1 -  Firstly, we should insert a compact flash disk to the one of the compact flash slot to the active or standby supervisor on the VSS chassises.

2 -We copy the modular IOS file and startup-config to the new flash disk.

Example

Copy sup-bootdisk: s72033-adventerprisek9-vz.122-33.SXI.bin disk0:

Copy nvram:startup-config disk0:

Or

Copy sup-bootdisk: s72033-adventerprisek9-vz.122-33.SXI.bin slavedisk0:

Copy nvram:startup-config slavedisk0:

3 - We power off the the chassis whose supervisor will be replaced and insert the new disk0 to the sup-bootdisk of the new supervisor module.

4 – Then new supervisor will be inserted to chassis and switch will be booted.

5 –  Connect the new supervisor through console port.After the new supervisor boots then it will be upgraded to modular ios and startup-config should be copied into it.

Example:

Dir sup-bootdisk0:

install file disk0:s72033-adventerprisek9-vz.122-33.SXI.bin sup-bootdisk:/sys

conf t

install bind sup-bootdisk:/sys

exit

copy sup-bootdisk0:startup-config nvram:startup-config

6 -  Go to active chassis and enter this command:

VSS#switch read switch_num local

Read switch_num from Active rommon is 1

If it is 1 on the active chassis then we should enter  this command on the new supervisor:

Router#switch set switch_num 2

Set rommon's switch_num to 2

If it is 2 on the active chassis then we should enter  this command on the new supervisor:

Router#switch set switch_num 1

Set rommon's switch_num to 1

7- Then we should reboot chassis without copying running-config to the startup-config

8- Then VSS should work after new supervisor boots.