Hi,
there are no specific settings within BE to tell the software to push through as much data as there is bandwidth available.
How is your NIC teaming set up? Are you aggregating your bandwidth, or is it for failover (1 NIC active, the other passive)?
Some things that might cause slow performance:
1. NICs and switch ports not set to the maximum speed of the NIC, ie. 1GB FULL;
2. network issues which cause latency during the backups;
3. AV scans during the backup (either of a B2D or BE services, so check these out);
4. Fragmented disks, especially if using it for B2D.
Thanks!