All things related to multicast

[Dave Hartzell <>]

Hi-

Just wondering if anyone has messed with GRE, Multicast and Linux.  What 
I'm doing is setting up a GRE tunnel between a multicast enabled Cisco 
and a Linux box.  I'm doing this because the network the Linux box is on 
cannot support multicast at this time, and I'm a glutton for punishment.

Everything works well on the Linux box when receiving multicast from 
Abilene, but sourcing a stream from the Linux box doesn't work.  The 
packets don't get routed to the tunnel, just out the local Ethernet 
device, even though there is a multicast entry in the routing table 
explicitly pointing at the gre tunnel interface.

Any ideas?  I'm running 2.4.14...maybe something is broken?

Thanks!

Dave Hartzell