Are you sure you're not hitting the top of the pipe and bouncing around in congestion avoidance ? Unless your window size limits your bw at exactly the correct amount, you'll never get the steady state
bw you want. Mark Allman wrote: > > Have you checked that both sides are negotiating SACK? > > No SACK in 4.1. But, there is no loss in th connection. > > > And both sides are negotiating a window scale option sufficiently > > large? (sounds like you need a window scale option of at least 5 > > bits?) > > We're seeing a shift of 6. > > > And the socket-buffer to ttcp is actually being set as large > > as you think? (perhaps run 'ktrace' or 'truss' on ttcp and look > > for an error on the setsockopt). > > We hacked ttcp to run getsockopt() to tell us if the kernel did not > honor our setsockopt() request. All looks fine. > > Thanks! Other ideas? > > allman > > -- > Mark Allman -- BBN/NASA GRC -- http://roland.grc.nasa.gov/~mallman/ > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-net" in the body of the message -- "I'm a-goin' to stay where you sleep all day Where they hung the jerk that invented work In the Big Rock Candy Mountains" wk: 408 742 1619 [EMAIL PROTECTED] hm: 650 726 0677 [EMAIL PROTECTED] cell: 650 303 3877 To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message
