Network problems

[Matthew Dillon]

:Hi,
:
:this started with an upgrade about 1-2 weeks ago (well, it started with 
:*something* that happened 1-2 weeks ago). Network (packet forwarding?) 
:stalled every 6-12 hours. Today I did another upgrade (no configuration 
:changes) and now it happens every 30-90 minutes.
:
:This box is my router connected to the net by an rl interface (via 
:pppoe) and connected to the internal network by an sis.
:
:When it hangs I can do:
:
:# [kill ppp]
:# ifconfig tun0 down
:# ifconfig tun0 up
:# [start ppp]
:
:Then I get a:
:
:Working in ddial mode
:Error: bundle_Create: ioctl(TUNSIFMODE): Device busy
:Using interface: tun0
:
:After which everything works normal again. If I leave out the down/up of 
:tun0 I won't get an error from ppp but it will use tun1 instead which 
:doesn't work.
:
:I could provide tcpdump output for both interfaces if there's interest.
:
:Sascha

    This seems eerily familiar.  I seem to remember we had a similar
    problem with the tun interface a while ago.

    Try to narrow down the date at which it stopped working by downloading
    snapshot kernels (assuming you don't have to load any modules to test
    the issue).

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>