IPv6 - communication port 11111

Hi there,

we found in the Network trace that the XMS is regularly trying to connect all of the XtremIO Controller's over Port 11111.

But only can connect to one of them. All other connection attempts fail. The XMS and the SC's are in the same subnet.

In the Storage Array Site Preparation guide this port is mentioned as only been used with IPv6 (page 36).

So I've the following three questions:

1. why are only connection attempts to one and the same SC successful?

2. what is the purpose of this connection?

3. how can we disable IPv6 communication?

any ideas and help is appreciated

Tom