Thanks.
Replies below.
If you total the
number of TCP frames per connection, and figure the retransmissions/resets
rate per frame, you could get <1%, or 5%, or 10%.
==> Alok: is
it per frame? or per connection? do you mean 10% of your traffic is
retransmissions? good! what is it ? a wireless/VSAT
link?
====>Gunndo:
Total connection retransmissions/Total TCP frames per connection over DSL,
cable, or T1 Internet connection. No wireless of VSAT. Typically
I see this running less than 1%, but what if it is higher? Is 10-30%
only acceptable in wireless?
==> Alok:
cant think why they should ever happen, I mean I have seen cases where no
links in the middle report CRC errors/dropped frames etc and yet I have seen
retransmissions and the only logic that comes to mind is that TCP is
misbehaving somewhere....and since most routers and switches are not aware
of TCP......
One recent
capture had 300 total retransmissions for one user, but the number of frames
for this user was 21.531, for a rate of 1.39%. Do I ignore this as a
normal occurrence?.
=> Alok: What
do you meanby "rate" here?
====>Gunndo: Total number of retransmitted
frames for a given LAN IP divided by total number of TCP
frames for a given LAN IP. Make the example read 300/21531, not
300/21.531.
=>Alok: Out here in India I have seen these
numbers on something as simple as bridged ethernet LAN too... so I really
dont know why they happen, but I do know that they do. i think 1% is
high if you say 1 out of every 10 TCP frames needs a retransmission.
Though it doesnt look that bad when you say "300/21531" :-) What you might
want to check is if there is a common host/bridge/proxy etc somewhere among
all those connections..........
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