I have been transferring files using SCP over our WAN. My configuration consist of an IPSEC tunnel and a physical IP encryption device therefore I could possibly have problems with MTU settings but haven't identified any at this time. My servers are connected via 1Gb links and the WAN consists of 10Gb links and a OC-192 backbone. I'm having a problem determining what transfer rates I should expect to see. I'm wondering what are the limitations of SCP. From my source server to my destination server I have about 15 to 20 ms delay. On average I'm getting transfer rates of approx. 5-8MB/s in one direction and 1-3MB/s in the other direction. Any idea if these transfer rates are reasonable? I was thinking that I should get upwards of 30MB/s transfer rates.
I have this problem too.