Confirm how to configure logical-chassis mode

[Russ]

Hi I'd like to confirm the correct command to configure a VDX6740 firmware 7.2.0c.
 
I read in some older doco switch# vcs vcsid 1 rbridge-id 2 logical-chassis enable but this is not available and I can't recall the correct syntax and mode to execute this. 

Thank you.

[Truyen_Phan]

Hi Russ,

Starting NOS 7.1.x and higher, the only valid VCS mode is logical chassis which is enabled by default, so there's no need to configure logical-chassis enable anymore. You just need to set the VCS ID and RB ID.

[Russ]

Hi thanks for you reply. When I was checking the status after applying the VCSID and RB ID the output indicated that the switch was in VCS Mode : Fabric Cluster and not logical-chassis. 

[Truyen_Phan]

You will need to downgrade to 7.0.x, then set the vcs mode to logical chassis, then upgrade.

[Russ]

Thanks again, for reference what was the command to configure logical-chassis mode?