Chapter 32. Basic Redundancy; Aggregation For Link Redundancy - Lenovo Flex System Fabric CN4093 Application Manual

Chapter 32. Basic Redundancy

Aggregation for Link Redundancy

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Enterprise NOS 8.4 includes various features for providing basic link or device
redundancy:
 "Aggregation for Link Redundancy" on page 511
 "Hot Links" on page 512
Multiple switch ports can be combined together to form robust, high‐bandwidth
LAGs to other devices. Since LAGs are comprised of multiple physical links, the
LAG is inherently fault tolerant. As long as one connection between the switches is
available, the LAG remains active.
In Figure 56, four ports are aggregated together between the switch and the
enterprise routing device. Connectivity is maintained as long as one of the links
remains active. The links to the server are also aggregated, allowing the secondary
NIC to take over in the event that the primary NIC link fails.
Figure 56. Aggregating Ports for Link Redundancy
Internet
For more information about aggregation, see "Ports and Link Aggregation (LAG)"
on page 157.
Enterprise
Routing Switch
LAG
Server
NIC 1
NIC 2
LAG
511