Poor routing performance

RouterOS General
1

Hello

I have a NAS in my office, and for some reason I had to move its subnet. The routing between the LAN subnet (192.168.0.0/24) and the NAS subnet (10.1.10.0/30) is done by a RB1100ahx2, which is also used as gateway for the office.

My computer has SSD disk and Gigabit LAN. NAS has gigabit LAN and RAID5 disks. Connecting directly the computer to the NAS (1 network cable and configuring the computer in the same subnet) gives awesome thougput, like 300+ real Mbps (ftp transfer)

But when the RB1100ahx2 does the routing between the two, average thoughput falls to 30-50Mbps (ftp transfer). RB1100 seems idle (CPU ok; no visible packet loss). No firewall rule, no queue, average packet size is around 1500 bytes (56Mbps in 4600 packets as seen in screen capture, traffic goes from ETH10 to ETH1).According to http://routerboard.com/RB1100AHx2 I should have much better bandwidth.. Any ideas?
routing.png

2

both are negotiated at Gigabit speed? Open up Ether1 and Ether10 and check if all link statuses look ok

3

Yes they are both at gigabit; scroll down the picture from the original post, i have put the ether1 and ether10 interface panels. No collisions nor drops are shown in RX/TX Stats page.

4

Ok problem solved. I moved the NAS network cable from ether10 to ether4 and now i’m almost reaching wire speed.

Not exactly sure why, it might have a link with the switch chip eth1-2-3-4-5, but in that case i’m not using the switch feature..
routing2.png