LAN Resiliency

LAN resiliency provides high-availability services to all network interfaces. High‑availability services can survive the failure of a network interface without interruption to the dialogs using that interface.

LAN resiliency eliminates single points of failure for network interfaces by logically moving the IP address associated with a network interface that failed to another, alternate network interface that is in the same subnet as the interface that failed. The default state for this option is enabled.

To enable LAN resiliency, enter the following:

NW TCPIP OPT + LANRESIL

In order for LAN resiliency to operate, the system must be configured in a fully redundant manner with more than one network interface providing the same physical connectivity. This eliminates all single points of failure.

The MCP system should be configured as an edge node at the LAN switches. If you do not configure the MCP system as an edge node, messages associated with LAN resiliency might not reach their destination and LAN resiliency will fail.

The system must have multiple network interface components and must be multihomed to the same subnet by two or more of those components.

The network interfaces must be configured with statically assigned IP addresses. IP addresses that have been dynamically assigned with DHCP will not be moved.