Optimize for WAN / VPN usage

Question

any tips how to best optimize/tweak either NW servers or the clients
to gain performance over a WAN tree ??
All together, 5 sites, 1 central location were most requested data is.
central = 100 Mbit
2 other sites = 10 and 100 Mbit
2 last sites = 4 Mbit
Issue is; testing with "pureip" transfers from client to client over
the VPN WAN ( Astaro's) performance is good and does use the bandwidht
but,, client usage like copying to or from the servers over the WAN
link doesn't seem to use the bandwidht as much..,,,
Current settings on the NW servers are;
nss /nocopybuffersonxlatch
set tcp sack option = on
set tcp delayed acknowledgement = on
set tcp minshall algorithm = on
Set TCP Large Window Option = On
set tcp number of preallocated pcbs = 2048
set tcp defend land attacks = on
set tcp nagle algorithm = on
set Maximum Pending TCP Connection Requests = 4096
set tcp ip maximum small ecbs = 65534
set ncp tcp receive window = 32768
set largest udp packet size = 32768
set tcp path mtu black hole detection and recovery = on
What I've tested is adding the last one, mtu black hole detection
and tested also by disabling(off) for minshall, delayed ack,,etc,,
Can't say Im really seeing any real difference
Any ideas ?
All networks are 1GB's networks/switched, bandwidht usage is NOT big
for anything else besides wan traffic.

Answer 1

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