Hi,
Could someone please explain the exact purpose of the FCoE VLAN range when you configure a storage VDC, as the documentation from Cisco leaves somewhat to be desired!
In the documentation I have read, it says to create the FCoE VLAN in the storage VDC and then map the FCOE VSAN to it:
vsan 10
vlan 10
fcoe vsan 10
That is pretty straightforward and what we do on the N5K's. Where it all goes a bit murky for me, is the next line where it says:
'Allocate FCoE VLAN range from the owner VDC to the storage VDC'
followed by:
'Best practice is to create VLAN ranges so that the shared interfaces configured in various VDCs can avoid overlap between the primary VDC and the storage VDC'.
This is done by the following:
vdc {storage-vdc}
allocate fcoe-vlan-range x-y from vdc {owner vdc}
What I want to know is what this is all about, as there is no context around it, and I don't fully understand.
What my guess is, is that the vlan range allocation is for the 'data' vlans (i.e. switchport trunk native vlan x) on the shared interfaces. What happens if these vlans are not contiguous?
Can we have multiple 'allocate fcoe-vlan-range' commands for the different 'owner' VDCs?
Also, in the example, they have the fcoe vlan as 20, and then 'allocate fcoe-vlan-range 10-40 from vdcs {owner vdc} - seems there is a clear overlap here as vlan 20 is within 10-40, so I'm not even sure if the example is correct.
More clarity would be fantastic please.
Thanks
Dominic