Re: Multicast fails when interface changed

[Chris Wright]

* Christopher James ([e-mail]) wrote:
> We are running an application that uses multicasting
> on Linux kernel 2.2.19. The application is
> connected to two network interfaces for redundancy
> purposes - only one interface is active at a time.
> When the application starts up on the first interface,
> the application can send and receive multicast messages.
> We then use ifconfig to bring down the first interface,
> and use ifconfig to bring up the second interface. The application
> works with the exception that it cannot receive multicast
> packets (it can still send multicast packets).

does your app use INADDR_ANY for imr_interface when you join the
multicast group?

-chris