Default Vs. Admin VDC in Nexus 7000

Both are used for the management of the complete switch and are used to assign interfaces to other non-default VDCs. Also global parameters like COPP etc. are only configured in default/admin VDC. So what is the difference?

Below is the difference between default and admin VDC.

Default VDC:-

In nexus, default VDC ( VDC-1) performs below two functions:-

1.       Default vdc can be used for the management of all the VDCs in the chassis. From default VDC, network-admin user creates, delete or modify other non-default VDCs.  It can allocate the interfaces to other non-default VDCs.

2.       Interface can be allocated to default VDC and then it can handle user traffic similar to the non-default VDC.

Admin VDC:-

Admin VDC can be created from the initial configuration wizard. It is only used for the management of the complete chassis and associated non-default VDCs. No interface can be allocated to admin VDC and hence it cannot handle user traffic.

Before 6.2(2), it is not available in SUP-1. In 6.2(2) version it is available on all supervisor modules.

Note: - Default and admin VDC cannot coexist at the same time. VDC 1 can either configure as default or Admin.

We can convert default VDC to admin by using below two commands:-

·         System admin-vdc :- When it is applied on default VDC, all the non-global configuration ( VDC specific)  will be removed.  And hence need to apply with caution otherwise the default VDC user traffic will be impacted.  It is generally applied during the initial configuration.

·         System admin-vdc migrate new-vdc-name :- It creates a new VDC and then migrate all configuration ,specific to the default VDC, to the new VDC except few configuration like management IP address, NTP address etc.

              All global configurations, like COPP, load balance methods etc., will remain in the admin                   VDC.