Thank you Nicolai,
Absolutely trunking is just allowing different VLANs to allow access to the trunk. It should not really matter however if there's just an access VLAN on the server.
Regarding the b/w distribution, just got the below from "NB planning & Performance Tuning Guide" page no. 109
"When a backup starts, NetBackup reads the bandwidth limit configuration and then determines the appropriate bandwidth value and passes it to the client. As the number of active backups increases or decreases on a subnet, NetBackup dynamically adjusts the bandwidth limiting on that subnet. If additional backups are started, the NetBackup server instructs the other NetBackup clients that run on that subnet to decrease their bandwidth setting. Similarly, bandwidth per client is increased if the number of clients decreases. Changes to the bandwidth value occur on a periodic basis rather than as backups stop and start. This characteristic can reduce the number of bandwidth value changes"
Its not VLANs but subnets (as a VLAN could have more than one subnet, not good practice though). It does state the servers within same subnet would decrease the b/w if more clients within same subnet start backup.
I didnt get any details on how to stop this, as in typical SMB data centers all the servers could be limited to 1 or 2 subnets. And having b/w limiations as such could be not so efficient.
