Vnic Teaming Failover - Lenovo CN4093 Application Manual

10gb converged scalable switch

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vNIC Teaming Failover

CN4093 Application Guide for N/OS 8.3

For NIC failover in a non-virtualized environment, when a service group's external

uplink ports fail or are disconnected, the switch disables the affected group's

internal ports, causing the server to failover to the backup NIC and switch.

However, in a virtualized environment, disabling the affected internal ports would

disrupt all vNIC pipes on those ports, not just those that have lost their external

uplinks (see

Figure 29. Regular Failover in a Virtualized Environment

Lenovo Switch

EXT1 link failure automatically

disables associated internal ports,

prompting failover on all VMs

To avoid disrupting vNICs that have not lost their external uplinks, N/ OS 8.3 and

the Emulex Virtual Fabric Adapter for Lenovo Flex System provide vNIC-aware

In the dedicated mode, when a vNIC group's external uplink ports fail, the switch

cooperates with the affected NIC to prompt failover only on the appropriate

vNICs. This allows the vNICs that are not affected by the failure to continue

without disruption (see

Figure 30 on page