= Update the JGroups Subsystem

The JBoss Server Migration Tool does the following updates to any *jgroups* subsystem configuration found while migrating a server configuration:

* Replaces protocol `MERGE2` with `MERGE3`.
* Replaces protocol `FD` with `FD_ALL`.
* Replaces protocol `pbcast.NAKACK` with `pbcast.NAKACK2`.
* Replaces protocol `UNICAST2` with `UNICAST3`.
* Removes protocol `RSVP`.

If you prefer, you can set the `subsystem.jgroups.update.skip` environment property to `true` to skip automatic update of the *jgroups* subsystem configuration.

Upon successful migration of the *jgroups* subsystem configuration, you should see the following message in the console:

[source,options="nowrap"]
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 INFO  Subsystem jgroups updated.
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