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.