SMB/NetBIOS slow over high speed WAN (T3/45mb) with 120ms RT

[M Osborne]

Hello,
I have a high speed WAN link (45mb), but it's to the UK and I get 120ms
response time. I've noticed that SMB/NetBIOS activities are VERY SLOW.
Many complaints... To open up a shared directory takes 10-15 seconds,
accessing a 100K file takes 20-30 seconds, etc. There is little
utilization on the link.

FTP, SCP, etc run very quickly.

We tried bumping up TCP window size -- this helped with FTP, but Windows
file sharing is STILL VERY SLOW.

I assume NetBIOS is the problem. Is there any way to tune NetBIOS on the
client PC and/or server to reduce the chatiness of NetBIOS?

Any other ideas? This stuff should scream, in my opinion with a 45mb
link...

Thank you.

Mike

 

[Mister Toilet]

We had similar problems and switched to using our Linux
FTP environment for anything that required distributed
WAN connectivity over high-speed high-latency links.

I really wish there was a solution for this as it makes
our transfers a little more complex, but we could not
deal with the speed issues.

We've tried all of the tweaks you suggest below but still
the problem persisted.

 

[Blind Rage]

Microsoft really needs to answer this one. Are there any
tweaks that will speed this up? I have the same problem
also, but there have been no answers so far.

I have seen responses to this thread in Google, but MS
obviously did not like them since they have been deleted
on their board.