Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 04-08-2006 Installation Manual page 281

2 On the Node Configuration screen, add a node to the cluster by specifying the
node name of the node you want to add, then click Add. Repeat this process for
each node you want to add to the cluster, then click Next.
You can find node names for servers by entering uname -n on each node.
If after adding a node to the cluster, you need to specify a different node name
for that node, double click the node you want to edit, change the node name, and
then click Edit.
3 On the Authentication Keys screen, specify the authentication method the cluster
will use for communication between cluster nodes, and if necessary an authenti-
cation key (password). Then click Next.
Both the MD5 and SHA1 methods require a shared secret, which is used to protect
and authenticate messages. The CRC method does not perform message authen-
tication, and only protects against corruption, not against attacks.
The SHA1 method is recommended, because it provides the strongest authenti-
cation scheme available. The authentication key (password) you specify will be
used on all nodes in the cluster.
4 On the Media Configuration screen, specify the method Heartbeat 2 will use for
internal communication between cluster nodes.
This provides a way for cluster nodes to signal that they are alive to other nodes
in the cluster. For proper redundancy, you should specify at least two heartbeat
mediums if possible.
Choose at least one Heartbeat Medium, and if possible, more than one.
If you choose Broadcast, select one of the available network devices in the device
list.
For multicast, choose a network device, multicast group to join (class D multicast
address 224.0.0.0 - 239.255.255.255) and the ttl value (1-255).
UDP Port sets the UDP port that is used for the broadcast media. Leave this set
to the default value (694) unless you are running multiple Heartbeat clusters on
the same network segment, in which case you need to run each cluster on a dif-
ferent port number.
Installing a Heartbeat 2 Cluster Using YaST 281