Symantec 5 manual Additional considerations for LLT, LLT directives, Directive Description

148 Installing VCS on a single node

Adding a node to a single-node cluster

Table 8-4	LLT directives
Directive	Description
set-node	Assigns the system ID or symbolic name. The system ID number
	must be unique for each system in the cluster, and must be in the
	range 0-31. The symbolic name corresponds to the system ID in the
	/etc/llthosts file.Note that LLT fails to operate if any systems share
	the same ID.
link	Attaches LLT to a network interface. At least one link is required,
	and up to eight are supported. The first argument to link is a
	user-defined tag shown in the lltstat(1M) output to identify the
	link. It may also be used in llttab to set optional static MAC
	addresses.
	The second argument to link is the device name of the network
	interface. Its format is device_name:device_instance_number. The
	remaining four arguments to link are defaults; these arguments
	should be modified only in advanced configurations. There should
	be one link directive for each network interface. LLT uses an
	unregistered Ethernet SAP of 0xCAFE. If the SAP is unacceptable,
	refer to the llttab(4) manual page for information on how to
	customize SAP. Note that IP addresses do not need to be assigned
	to the network device; LLT does not use IP addresses.
set-cluster	Assigns a unique cluster number. Use this directive when more than
	one cluster is configured on the same physical network connection.
	LLT uses a default cluster number of zero.
link-lowpri	Use this directive in place of link for public network interfaces.
	This directive prevents VCS communication on the public network
	until the network is the last link, and reduces the rate of heartbeat
	broadcasts. Note that LLT distributes network traffic evenly across
	all available network connections. It also enables VCS
	communication, and broadcasts heartbeats to monitor each network
	connection.

For more information about LLT directives, refer to the llttab(4) manual page.

Additional considerations for LLT

You must attach each network interface that is configured for LLT to a separate and distinct physical network.