1. Temporarily bring down the network interfaces on the standby node  clnode_2  in a terminal  console that you open by using the Hardware Management Console (HMC), as shown in  Example 3-31. 2. Within about a minute of the step 1 as a response to the split-brain situation, the node  clnode_2  (with no communication to the NFS server) restarts itself. You can view this  action on the virtual terminal console that is opened (by using the HMC) on that node,  which is also reflected by the status of the cluster nodes (Example 3-32). 3. After a restart, the node  clnode_2  is functional, but with the cluster services stopped  (Example 3-33). 4. Manually start the services on the  clnode_2  node (Example 3-34). Note:  In previous versions of PowerHA, PowerHA tries to bring up the adapter as part  of its recovery mechanism. clnode_2:/# ifconfig en0 down; ifconfig en1 down clnode_2:/# clnode_1:/# clmgr -cva name,state,raw_state query node # NAME:STATE:RAW_STATE clnode_1:NORMAL:ST_STABLE clnode_2:UNKNOWN:UNKNOWN clnode_1:/# clnode_1:/# clmgr -cva name,state,raw_state query node # NAME:STATE:RAW_STATE clnode_1:NORMAL:ST_STABLE clnode_2:OFFLINE:ST_INIT clnode_1:/# clnode_2:/# clRGinfo ----------------------------------------------------------------------------- Group Name Group State Node ----------------------------------------------------------------------------- rg_IHS ONLINE clnode_1@site1 OFFLINE clnode_2@site2 clnode_2:/# clnode_2:/# clmgr start node [...] clnode_2: Completed execution of /usr/es/sbin/cluster/etc/rc.cluster clnode_2: with parameters: -boot -N -A -b -P cl_rc_cluster. clnode_2: Exit status = 0 clnode_2:/# Example 3-31 Simulating a network down event Example 3-32 Cluster nodes status immediately after a simulated network down event Example 3-33 Cluster nodes and resource group status after node restart Example 3-34 Starting cluster services on the recently restarted node Chapter 3. Planning considerations  81 Complete the following steps: