Wi-Fi Array
186
Configuring the Wi-Fi Array
a.
Active Backup (gig1/gig2 failover to each other)
—This mode
provides fault tolerance and is the default mode. Gigabit 1 acts as the
primary link. Gigabit2 is the backup link and is passive. Gigabit2
assumes the IP properties of Gigabit1. If Gigabit 1 fails the Array
automatically fails over to Gigabit2. When a failover occurs in this
mode, Gigabit2 issues gratuitous ARPs to allow it to substitute for
Gigabit1 at Layer 3 as well as Layer 2. See
Figure 107
(a).
b.
Aggregate Traffic from gig1 & gig2 using 802.3ad
—The Array sends
network traffic across both gigabit ports to increase link speed to the
network. Both ports act as a single logical interface (trunk), using a
load balancing algorithm to balance traffic across the ports.
The destination IP address of a packet is used to determine its
outgoing adapter. For non-IP traffic (such as ARP), the last byte of the
destination MAC address is used to do the calculation. The network
switch must also support 802.3ad. If a port fails, the trunk degrades
gracefully—the other port still transmits. See
Figure 107
(b).
Figure 107. Port Modes (a-b)
Gig1
Gig2
Primary Link
Secondary Link :
carries all traffic
if primary fails
Switch
Gig1
Gig2
Switch
Links split traffic based on
destination address , using
802.3ad link aggregation
Destinations
(a) Active backup
(b) Aggregate using 802.3ad
Summary of Contents for Wi-Fi Array XS-3500
Page 1: ...October 28 2009 ...
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Page 15: ...Wi Fi Array Table of Contents xi Glossary of Terms 455 Index 467 ...
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Page 140: ...Wi Fi Array 118 Installing the Wi Fi Array ...
Page 196: ...Wi Fi Array 174 Viewing Status on the Wi Fi Array ...