DFS Transfer Of Large Files (Backups)

[desswood]

We have a domain (all windows 2003 server SP1) connected across a site-site

vpn using ISA 2004 on a DC at each end. This is the top level tree in a

forest. Each site has its own tree in the forest. Everything else appears to

be working perfectly, all DCs are replicating, exchange organisation works

fine across the sites.

A test DFS structure is in place which works fine with small files but our

trouble appears to be when trying to replicate large backup files (*.bkf)

between sites (replication occurs fine between site DCs). Note: *.bkf is not on the file exclusion list

We have attempted the following:

a) Replication schedule on 24/7.

B) Replication schedule b/n 18:00 and 08:00 (as ADSL download speed is

affected on site 2, when DFS replication is on ADSL download speed decreases

from a typical 1800kbps to b/n 80 & 600 kbps)

Connection between sites is

Site 1: 1MB ADSL (256 KB Upload)

Site 2: 2MB ADSL (256 KB Upload)

Site 2 has the source files and is trying to replicate to site 1.

Questions are as follows:

1) Does DFS using FRS struggle with file sizes of b/n 1GB and 3GB?

2) Does DFS sing FRS restart file replication when using scheduled times

rather than 24/7?

2) Why does site 2's download speed drop so significantly if it can only

upload at 256 kbps.

Anyones thoughts would be deeply appreciated?

My thanks in advance Dave.