[jboss-jira] [JBoss JIRA] Closed: (JBAS-3537) Add a startup switch to configure a multicast port

[Brian Stansberry (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBAS-3537?page=all ]

Brian Stansberry closed JBAS-3537.
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    Fix Version/s: JBossAS-5.0.0.Beta2
                       (was: JBossAS-5.0.0.CR1)
       Resolution: Done

Switch is -m -r --mcast_port.

> Add a startup switch to configure a multicast port
> --------------------------------------------------
>
>                 Key: JBAS-3537
>                 URL: http://jira.jboss.com/jira/browse/JBAS-3537
>             Project: JBoss Application Server
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: Clustering
>            Reporter: Brian Stansberry
>         Assigned To: Brian Stansberry
>             Fix For: JBossAS-5.0.0.Beta2
>
>
> Proper cluster isolation with UDP requires use of a different cluster name, different multicast address and different multicast port.  (See http://wiki.jboss.org/wiki/Wiki.jsp?page=PromiscuousTraffic for why the latter is important.)
> The -g and -u switches allow easy configuration of the cluster name and multicast address. But, configuring the port that way wasn't practical, as an AS instance may have many different JChannels.
> With the JGroups multiplexer, a switch is a possibility, as by default there will only be one JChannel per server instance.  (If a user wanted to use more than one JChannel, they would need to manually configure the second one to use a different port.)

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