Blade ICE G8000 - Manual (Page 136)

RackSwitch G8000 Application Guide
136 „ Chapter 10: High Availability BMD00041, November 2008
Uplink Failure Detection
Uplink Failure Detection (UFD) is designed to support Network Adapter Teaming. Network
Adapter Teaming allows all the NICs on each server to share the same IP address. The NICs
are configured into a team. One NIC is the primary link, and the other is a standby link.
UFD allows the switch to monitor specific ports (Link to Monitor ports) to detect link failures.
When the switch detects a link failure, it automatically disables specific ports (Link to Disable
ports). Each corresponding server’s network adapter can detect the disabled port, and trigger a
network-adapter failover to another port on the switch.
The switch automatically enables the control ports when the monitor ports return to service.
The following figure shows a basic UFD configuration, with a Failure Detection Pair (FDP)
that consists of one LtM (Link to Monitor) and one LtD (Link to Disable). When the switch
detects a link failure in the LtM, it disables the ports in the LtD. The servers detect the disabled
ports, which triggers a NIC failover.
Figure 10-1 Uplink Failure Detection example
Enterprise
Routing Switch Enterprise
Routing Switch
LtD
LtM
NIC
1 NIC
2
Server
G8000 G8000