VM Off-host can be a media server as well??

Hello,

we have some network throughput issues so planning to replace the current  ( attached the picture ) way of backup to new so can some one pls 

correct if this doen't seems right ( want to use same windows server as off-host and media server).

Also i believe few of them have vblock in their shops whats the best way to back to that ? becauase we can't intermix the fabric like vblock has Cisco MDS and our external has brocade so we can't use the SAN transport.