Netgear XCM8810 Chassis Hardware Installation Guide - Page 205

NETGEAR 8800 Chassis Switch CLI Manual Usage Guidelines The first port specifies the primary port. The second port specifies the redundant port. A software-controlled redundant port is configured to back up a specified primary port; both ports are on the same device. The redundant port tracks the link state of the associated primary port, and if the link on the primary port fails, the redundant port establishes a link and becomes active. You can back up a specified Ethernet port with a redundant, dedicated Ethernet port. You configure the redundant link to be always physically up but logically blocked or to be always physically down. The default is off, or the redundant link is down. The following criteria must be considered when configuring a software-controlled redundant port: • You can configure only one redundant port for each primary port. • You cannot have any Layer 2 protocols configured on any of the VLANs that are present on the ports. (You will see an error message if you attempt to configure software redundant ports on ports with VLANs running Layer 2 protocols.) • The primary and redundant port must have identical VLAN memberships. • The master port is the only port of a load-sharing group that can be configured as either a primary or redundant port. (The entire trunk must go down before the software-controlled redundant port takes effect.) • Only one side of the link should be configured as redundant. Example The following command configures a software-controlled redundant port: configure ports 1:3 redundant 2:3 configure sharing add ports configure sharing add ports Description Adds ports to a load-sharing, or link aggregation, group. By using link aggregation, you use multiple ports as a single logical port. Link aggregation also provides redundancy because traffic is redistributed to the remaining ports in the link aggregation group (LAG) if one port in the group goes down. Syntax Description port port_list Specifies the logical port for a load-sharing group or link aggregation group (LAG). This number also functions as the LAG Group ID. Specifies one or more ports or slots and ports to be grouped in the LAG. Chapter 5. Commands for Configuring Slots and Ports on a Switch | 205