Re: multicast Bug in kernel many versions...

Jared Mauch (
Thu, 31 Oct 1996 13:06:44 -0500 (EST)

Is there a reason you don't turn this on on your ethernet
interface on the router:?

ip pim dense-mode

Or sparse-mode, depending on what you want to do? That makes
it so that your ethernet will get multicast packets, and machines that
do a /sbin/route add -net netmask dev eth0
will see the traffic.

That's our configuration here. If you have a access-list (firewall)
configured on the router, add this to your permit section also:

access-list XX permit udp any

Charlie Ross graced my mailbox with this long sought knowledge:
> Heres my problem... simple to explain.. probably hard to debug...
> I have multicasting complied in.. (2.0.24 but the problem existed ever
> since i have tried multicasting...)
> I start mrouted with a tunnel.. (the tunnel is to a cisco 4000 router)
> everything works... tunnel is up... can see the mbone...
> then I try to use another machine in my subnet (namely a sparc 4)
> with multicasting software... it sees the mbone too... honkey dorey..
> but the more packets i send with that machine... the more my linux
> machine's memory gets eaten (not by any procceses I can see... with top...
> but it still gets eaten... presumadely by the kernel...) if I send a steady
> datastream from the sun... my linux machine eats all 24 meg in about 2
> minutes.. then goes into swap-thrash... (unless I have the swap off then
> it just dies with "out of memory" errors)
> If I kill the mrouted before the end... it does NOT free up the memory...
> It's a very strange problem...
> any help?
> -Chuck
> (717)-337-8212
> "God is real, unless declared integer."