Wireless Access Point
176 Configuring the Wireless AP
may be bonded. You may also include just one single port in a bond—this
is useful for mirroring one Gigabit port to another port (Step c on
page 178). In APs that have four Gigabit ports, you have the option of
bonding three or four ports together. In this discussion, we call two ports
that are bonded Gigx and Gigy.
a. Active Backup (gig ports fail over to each other) — This mode
provides fault tolerance and is the default mode. Gigx acts as the
primary link. Gigy is the backup link and is passive. Gigy assumes
the IP properties of Gigx. If Gigx fails, the AP automatically fails over
to Gigy. When a failover occurs in this mode, Gigy issues gratuitous
ARPs to allow it to substitute for Gigx at Layer 3 as well as Layer 2.
See Figure 103 (a). You may include more than two ports in the bond
with Active Backup to provide additional fault tolerance. For
example, if you have three Gigabit ports configured in a bond, if the
first two ports in the bond were to go down, the AP would fail over
traffic to the third Gigabit port.
Figure 103. Port Modes (a, b)
(a) Active backup (b) Aggregate using 802.3ad
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