Multi-homed Servers

1

Using Adaptive Fault Tolerant” Drivers and NICs

NIC Has a Single IP/MAC Address (Active on one NIC at a Time)

When Faulty Link Repaired, Does Not Fail Back to Avoid Flapping

Fault-tolerant Drivers Available from Many Vendors: Intel, Compaq, HP, Sun

Many Vendors also Have Drivers that also Support etherchannel

Server Farm

Dual-homed Server—Primary NIC Recovery (Time 1–2 Seconds)

L3 (router)

Core

L3 (router)

Distribution

L2

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