Name

MulticastStats

Synopsis

MulticastStats <dest addr>:<port>[,ttl]M
ulticastStats <myip addr> <dest addr>:<port>[,ttl]
Default none 
Server

mod_backhand announces the status of its machine to others in the cluster by broadcasting or multicasting them periodically. By default, it broadcasts to the broadcast address of its own network (i.e., the one the server is listening on), but you may want it to send elsewhere. For example, you may have two networks, an Internet facing one that receives requests and a backend network for distributing them among the servers. In this case you probably want to configure mod_backhand to broadcast on the backend network. You are also likely to want to accept redirected requests on the backend network, so you’d also use the second form of the command to specify a different IP address for your server. For example, suppose your machine’s Internet-facing interface is number 193.2.3.4, but your backend interface is 10.0.0.4 with a /24 netmask. Then you’d want to have this in your Config file:

MulticastStats 10.0.0.4 10.0.0.255:4445

The first form of the command (with only a destination address) is likely to be used when you are using multicast for the statistics instead of broadcast.

Incidentally, mod_backhand listens on all ports on which it is configured to broadcast — obviously, you should choose a UDP port not used for anything else.

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