How to upgrade ios with VSS array in 4507

[RobertoCarrillo]

Hi, 

I need to upgrade 2 cisco 4507 with redundant supervisor on VSS, I already check the standard procedure but I would like to know the steps to load the images to the 4 supervisors and restart the VSS array simultaneously, I hope they can help me.

[Leo Laohoo]

1. Individually copy the IOS file into each supervisor card individually using the "copy tftp://tftp_IP_address/IOS_filename.bin bootflash:".
2. Change the boot variable string to point to the new IOS. 
3. Make sure the config-registry value is 0x2102.

[RobertoCarrillo]

This is the procedure that I intend to follow (Sorry about the Spanish)

1. Respaldo de configuración en ambos Core.

Show runing-configuration

Show vlan

Show ip int brief

Show interface status

show ver | in IOS

show ver | in ROM

show license image levels

show switch virtual

show switch virtual role

show switch virtual link 

show switch virtual link port-channel

1. Borrado de versiones viejas dejando las ultimas 2.

delete bootflash: **********

1. Carga del nuevo IOS en las 4 supervisoras.

copy tftp bootflash:

copy bootflash: slavebootflash:

sw1-slot5-bootdisk:

sw1-slot6-bootdisk:

sw2-slot5-bootdisk:

sw2-slot6-bootdisk:

1. Validar el hash de la imagen

verify /md5 bootdisk: *********

1. Editar el Bootmark start con la nueva versión.

boot system flash bootdisk: **********

no boot system flash bootflash **********

show bootvar

1. Validar prioridades y Roles del VSS.

show switch virtual

show switch virtual role

1. Reiniciar las Supervisoras en Standby.

redundancy reload shelf

1. Reinicio de las supervisoras en modo activo.

reload shelf

1. Validar que cada Core quede en su Roll - Modificar de manera manual de no ser así.

show switch virtual

show switch virtual role

redundancy force-switchover

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But I do not know if it's the best option.

[Leo Laohoo]

1. The first part is of little use because it's just a bunch of "show" commands. 
2. I would NOT erase the old IOS because if the new IOS fails, one needs something to "fail over" to and this is the old IOS.  
3. Check the config-registry value.  There are cases where the supervisor cards are shipped with a config-registry value of 0x2101 (instead of 0x2102). 
4. Read the Release Notes carefully.  There are times when the new IOS requires a mandatory ROMmon upgrade, particularly when running VSS.  
5. Change the boot variable string to boot the new IOS but also include a second boot variable string to boot the OLD IOS.  This is to ensure that if the new IOS fails to boot then the supervisor cards will boot the old IOS.
6. After changing the boot-variable string, don't forget to save the config. 

[LAN team]

Hello,

Do you know the process to reload each card one by one in SSO mode to have a minimal outage by switchover ?

Thank you.

[Leo Laohoo]

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@LAN team wrote:

Do you know the process to reload each card one by one in SSO mode to have a minimal outage by switchover ?

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I would not recommend doing this because this is what gets done during ISSU or FSU/eFSU. 

I, personally, do not use ISSU or FSU/eFSU in production network because it is usually does not work.  

[LAN team]

Thank you Leo.