On Sun, 9 Jan 2000, Paul Mackerras wrote:
|On Sun, 09 Jan 2000, Clifford Kite wrote:
|
|> Currently it seems that with the idle option pppd includes echo requests
|> from the peer and it's own echo replies when checking link activity. This
|
|I don't think that's right, at least I hope it's not right, it's certainly
|not the intention. The intention is that only data packets (PPP protocol
|numbers < 0x8000) count as link activity.
|
|I just looked at the source for the new driver in linux-2.3.x and it looks
|OK to me. The one in 2.2.x also looks OK. If anyone can produce the
|wrong behaviour repeatably (and you have checked with tcpdump that you are
|not getting any unexpected IP traffic) let me know and I'll look into it.
After Steve Dodd's reply I managed to find the ioctl call in get_idle_time
and it look's to be the only check of "link activity." I also know that
an ISP can do things other than echo request to keep the link up. The
university ISP service I use does something that seems very strange and
that, more often than not, defeats the idle option when mail is fetched.
So the posts I've seen may all have other explanations, but I'll make some
tests with the pppd echo request when time allows and report back to this
forum.
Thanks for your reply.
---
Clifford Kite Not a guru. (tm)
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