We are building a system using ZeroMQ 3.2.3 which will have processes publishing/subscribing on/to multicast channels using PGM (epgm). We would ideally like to have the capability to let a process subscribe to a multicast group where the publishing process resides on the same host. This capability was available through setsockopt() using MULTICAST_LOOP in ZeroMQ v.2.x but has been taken out in the current version. I can put the hooks back into our local ZeroMQ repo to enable MULTICAST_LOOP. However going through some of the dev-list posts like http://article.gmane.org/gmane.network.zeromq.devel/2254/match=multicast it seems like it was taken out for a reason.
Can anyone elaborate the reason why MULTICAST_LOOP was taken out of the library and what are the possible side-effects of putting it back in? Thanks. Chinmay
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