Sets CHANNEL management parameters, currently limited to priority values. NOTE If a LAN device/IP interface is disabled for use by cluster communications, all channels associated with that device/interface are deleted. This means that all management settings for that device and its associated channels will be deleted. Format SET CHANNEL nodename
1 – Parameter
nodename[,...] Includes channels to specific nodes, which you can use wildcards to specify. Each node name can be accompanied by optional qualifiers to specify local and remote device names. If no local or remote device name is specified, all channels to the specified node name are included. Use the SHOW CHANNEL command to display node names and local and remote device names.
2 – Qualifiers
2.1 /EXCLUDE
/EXCLUDE=(nodename[,...]) Excludes channels to specific nodes, which you can use wildcards to specify. Each node name can be accompanied by optional qualifiers to specify local and remote device names. If no local or remote device name is specified, all channels associated with the specified node are included.
2.2 /LOCAL_DEVICE
/LOCAL_DEVICE=(landevicename/IPinterfacename[,...]) Specifies a LAN device/IP interface that identifies the local end of the channel; you can use wildcards to specify LAN devices/IP interfaces. Use the SHOW CHANNEL command to display node names and local and remote device names, or use the SHOW LAN_DEVICE/SHOW IP_INTERFACE command to display device names.
2.3 /PRIORITY
/PRIORITY=n Sets the management priority value for channels to selected nodes. n can be a value between -128 and +127. Suggested values are: 2 to cause channels to be preferred -2 to exclude channels NOTE Starting with OpenVMS Version 7.3-2, a channel whose priority is -128 is not used for cluster communications. The priority of a LAN channel is the sum of the management priority assigned to the local LAN device and the channel itself. Similarly the priority of IP channel is the sum of the management priority assigned to local IP interface and channel itself. Therefore, you can assign any combination of channel and LAN/IP device management priority values to achieve a total of -128. CAUTION If you set the priority of all channels to -128, you totally disable use of the LAN/IP for cluster communication. This can cause the system to CLUEXIT.
2.4 /REMOTE_DEVICE
/REMOTE_DEVICE=(landevicename/IPinterfacename[,...]) Specifies a LAN device/IP interface that identifies the remote end of the channel; you can use wildcards to specify LAN/IP devices. Use the SHOW CHANNEL command to display node names and local and remote device names, or use the SHOW LAN_DEVICE/SHOW IP_INTERFACE command to display device names. Use the SHOW LAN_DEVICE/SHOW IP_INTERFACE command on the remote node to display remote device names.
3 – Example
SCACP> SET CHANNEL/PRIORITY=3 NODE5 The command in this example sets the priorities of all channels to node NODE5 to 3.