4.1.0 HP Polyserve Software Installation Guide (T5392-96066, October 2010)

Secret Network Key. This password is required. It provides additional security for
network communications among the matrix servers. To set this key, click Set Secret
Network Key. You can enter anything you want for this password, up to 127
characters in length.
NOTE:
If more than one Matrix Server matrix is running on the same subnet, be sure that
each matrix has a different Secret Network Key. This step ensures that the multicast
traffic is targeted only at the servers with the same Secret Network Key.
Cluster Administrative Traffic Protocol. Select either multicast or unicast mode. Multicast
mode is recommended; however, if your network configuration does not allow
multicast traffic through the network, you can use unicast mode.
When you have completed the fields on the General Settings tab, go to the SAN &
Fencing tab.
SAN & Fencing tab
When certain problems occur on a server (for example, hardware problems or the
loss of matrix network communications), and the server ceases to effectively coordinate
and communicate with other servers in the matrix, Matrix Server must remove the
server’s access to filesystems to preserve data integrity. This step is called fencing.
The SAN & Fencing tab allows you to select the method that Matrix Server should
use to remove access to the SAN.
There are two fencing methods:
• FibreChannel switch-based fencing. When a server needs to be fenced, Matrix
Server will disable the server’s access in the FibreChannel fabric. The server must
be rebooted to regain access to the SAN. This method is also called fabric-based
fencing.
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