Administrator's Guide

Cluster File System Administration
Cluster Communication - LLT
Chapter 3
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Cluster Communication - LLT
LLT provides kernel-to-kernel communications and monitors network communications.
The LLT files /etc/llthosts and /etc/llttab can be configured to set system IDs
within a cluster, set cluster IDs for multiple clusters, and tune network parameters such
as heartbeat frequency. LLT is implemented so events such as state changes are
reflected quickly, which in turn enables fast responses.
LLT is automatically configured initially when Serviceguard is installed, and LLT is also
automatically configured each time the CFS package is started.
See the llttab(4) manual page.