After I decided to switch from linux-2.4.22-gentoo-r4 to linux-2.4.22-gentoo-r5 I got the following problem. A ipsec-tunnel that worked fine for over a year stopped working. I think the IKE works fine [sent MR3, ISAKMP SA established], but after that something goes wrong in the quickmode. A few second later I get a [ignoring Delete SA payload: IPSEC SA not found (maybe expired)]. 60 seconds later ipsec rekeys.
*** Bug 38790 has been marked as a duplicate of this bug. ***
*** Bug 38716 has been marked as a duplicate of this bug. ***
Sorry, posted in the wrong section :-()