Manual Part 2

Wireless Array
172 Configuring the Wireless Array
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 174). In Arrays 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 Array 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 101 (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 Array would fail
over traffic to the third Gigabit port.
Figure 101. Port Modes (a, b)
(a) Active backup (b) Aggregate using 802.3ad