[Voyage-linux] Re: [Madwifi-users] Weirdness - 12 second dropouts every 4 minutes

[Michael Renzmann]

Hi.

On Tue, 2005-11-22 at 11:55 +1300, Matt Brown wrote:
> We see the exact same problem and have tracked it down to the madwifi
> driver dropping multicast packets every now and again. This causes OSPF
> to lose some hellos and the link adjacency goes down. In our case with
> hellos being sent every 10 seconds, OSPF would lose 4 hellos in a row
> and receive a hello just as the dead-timer fired. Hence the adjacency
> was only down for 10-12 seconds. 

Out of curiosity: which OSPF daemon do you use?

> We're still using the old madwifi driver, so I wasn't going to report
> this until I had had a chance to try madwifi-ng and see if the behaviour
> was still apparent. 
> 
> I can provide tcpdumps etc if needed. 

Yes, please do so. Additional tests for madwifi-ng would be nice. The
problems regarding multicasts could also be the reason why some people
can't get DHCP leases via MadWifi.

If anyone else runs into similar problems, please let us know. At least
for me this is an essential problem as well, as we're running MadWifi
along with Quagga, too, and such problems are of course real
show-stoppers.

Matt, Edwin, could anyone of you please file a ticket for this issue,
along with a description of the facts that you already found out?

Bye, Mike