On Mon, Apr 01, 2002 at 07:52:19PM +1200, Sahil Gupta - Net4U Limited wrote:
Funnily enough when we ping a machine of his, we seem
to be jumping up and
down in the ping rates. At times as low as 4ms and as high as 55ms over a
What could it be? RAM?
You know, it could just be straight congestion. Did you thin kof that?
When you congest a link too much, you're going to get packet loss.
A 55ms ping probably just means that the link was being used when the ping
If there are lots of clients on a slow link, then you should *expect* a lot
of variation in latency across the link, maybe 200 ms on a link as slow as
that, maybe even more; things such as tcp window sizes and speed of sending
host etc all matter there.
I'd make sure that no hosts are using large tcp window sizes, Linux is
especially bad at defaulting to large window sizes that will overly congest
a slow link with a single tcp session. 64kbytes in the air, when you can
only send a maximum of 48kbytes (- overheads) a second, could straight away
mean you're over a second in latency from a fast/close link.
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