About Low Latency Transport (LLT)

VCS uses private network communications between cluster nodes for cluster maintenance. The Low Latency Transport functions as a high-performance, low-latency replacement for the IP stack, and is used for all cluster communications. Symantec recommends at least two independent networks between all cluster nodes.

For detailed information on the setting up networks, see Cluster Server Configuration and Upgrade Guide.

These networks provide the required redundancy in the communication path and enable VCS to differentiate between a network failure and a system failure.

LLT has the following two major functions: