multicast discovery and ?group=parameter

[Aleksandar Ivanisevic <al...@ivanisevic.de>]

http://activemq.apache.org/discovery-transport-reference.html

can someone explain or point to the explanation in the docs about the
group parameter in multicast discovery?

What is the difference between specifying different group and
specifying a different multicast address?

The reason why I'm asking is that I've seen connection attempts to my
broker from clients having multicast://default?group=xxx, although it
has no group parameter in the URI, only multicast://default.

How is this supposed to work? no group means any group or what?

Re: multicast discovery and ?group=parameter

[Gary Tully <ga...@gmail.com>]

the default group name is "default" so a group attribute can override this.
Having no group parameter means that you are in the default group.
The group is used to multiplex on a single multicast address. Using a
different multicast address and the no (or the default) group parameter does
the same thing.
I think the only difference may be operational, if routers need to be
configured to allow more mutilcast packets through.

2009/5/25 Aleksandar Ivanisevic <al...@ivanisevic.de>

>
>
> http://activemq.apache.org/discovery-transport-reference.html
>
> can someone explain or point to the explanation in the docs about the
> group parameter in multicast discovery?
>
> What is the difference between specifying different group and
> specifying a different multicast address?
>
> The reason why I'm asking is that I've seen connection attempts to my
> broker from clients having multicast://default?group=xxx, although it
> has no group parameter in the URI, only multicast://default.
>
> How is this supposed to work? no group means any group or what?
>
>
>


-- 
http://blog.garytully.com

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