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Webcast-Catalyst9k
New Member

file transfer limitation in one way..

We are an isp and offering connection to 1 of our customers between israel

and us.

customer complain that when he do a file transfer from isreal to us he is

gettting only 0% of port speed wich is 512k.

whe he is testing from us to isreal he gets 100%.

I tried to explain that there is no limitation at our and and we tested by doing 2 or 3 file transfer the same time and I can see

utilization up to 100%

So with 1 file transfer session he has 200k only.

with 2 file transfer sessions 400k

und up to port speed with 3 sessions.

Custumer still want to reach port speed with only 1 file transfer session.

I have feeling that this is an application limitation problem but I have to

prouve it.

Anyone can advise what could limit this to only 40% ?

2 REPLIES
VIP Purple

Re: file transfer limitation in one way..

Hello,

can you find out if there are any bandwidth shaping devices (e.g. PacketShaper) in the path from your customer to the destination in the US ? Can you find out which FTP application your customer is using ?

Regards,

GP

Bronze

Re: file transfer limitation in one way..

This is usually a problem with the hosts not being tuned for high latency connections. Sounds like the receiving host on the slow transfer is not offering a big enough window and/or the sending host does not have enough buffer space. You need to sniff it to see whats really going on.

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