Pablo Milano wrote:
I am using L2TP on linux as a VPN server with L2TP/IPSec
clients. I observed that, when the connecion is heavily used
(e.g, transferring a big archive) the L2TP connection hangs
at the server side.
Could you elaborate on this? Is this reproducable? Is there a
certain size when this occurs? Do you have a bad or slow link?
/*
* FIXME: How about adaptive timeouts?
*/
// tv.tv_sec = 1
tv.tv_sec = 15;
tv.tv_usec = 0;
schedule (tv, control_xmit, buf);
Maybe 15 is an exagerated value, but I donīt have the hanging
problem anymore. As I saw, the 1 second timeout is low
because of the high load on the link. As the link has too
much traffic, the control message does not arrive on time.
I see that rp-l2tp has adaptive timeouts. It too starts with
a 1 second time-out and then doubles it until a maximum of
8 seconds is reached:
/* Double timeout, capping at 8 seconds */
if (tunnel->timeout < 8) {
tunnel->timeout *= 2;
}
So perhaps 15 seconds is indeed a bit exaggerated.
Jacco
--
Jacco de Leeuw mailto:[EMAIL PROTECTED]
Zaandam, The Netherlands http://www.jacco2.dds.nl
