We've got Windows Server 2008 R2 which servers as DC, Exchange mail server and file share (Let's call in Server-1). We also have fiber channel network storage, connected to this server. Putting there backups with Symantec Backup Exec 2010 (hosed on different server) over network regularly (it will be Server-SBE).
The problem is that over time (couple weeks usually) it's network receive speed on Server-1 goes down. It remains 1 Gbps in network adapter info but practically I see 300-400 kbps when I try to copy file to this server from some other servers, including Server-SBE.
It's not network storage problem, since copying to local disk C slow as well. It is not disk subsystem problem either, since copying files locally goes OK.
And it's also kinda selective: for example I can copy file from my workstation to this server with healthy speed of 10 MB/s (since there is 100M connection between), but I cannot do the same from my SBE server (2008R2 as well) despite 1G connection between them. After reboot of Server-1 everything gets back to normal. But it's really bad, since backups are not finished over weekend.
Any thoughts how do deal with it or what could the reason?
- Network Switch is Cisco C3560X
- RAID1 on both servers (HP DL360p Gen8) and Network Storage (DELL MD3600f)
- Server-1 is bare-metal, while Server-SBE housed on VMWare ESXi 5.1 (but we had same problems while it was bare-metal as well).