| While we are at it: that would explain the poor PPP throughput if the
| TCP end is a Linux system, too! Does IRIX 6 support SACK, perchance?
| Why is Linux using SACK, anyway?
| Stevens refers to it like "yeah, the BSD people implemented it once, but
| it didn't work so it was discarded and is now obsolete".
| And, you know, if Stevens says so, I'd be tempted to just accept this as
| God given and be done with it. What was the reason to add SACK support
| to Linux? Almost no system under the sun seems to support it, anyway.
Nope, Solaris 2.6 has a patch that supports SACK, and I believe that the
new M$ Winsock 2.0 supports SACK.
Overall, SACK would be beneficial to an environment with high
bandwidth-latency product, esp in a satellite link.
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