Aggregate And Redundant Interfaces; Aggregate Interface - Aerohive AP120 Hardware Reference Manual

Chapter A
A
GGREGATE AND
By default ETH0 and ETH1 act as two individual Ethernet interfaces. For more information, see
and Redundant Interfaces" on page
backhaul mode, the AP transmits broadcast traffic only through ETH0. The AP transmits broadcast traffic
through ETH1 only when ETH0 does not have network connectivity. When both Ethernet interfaces are
connected to the network and are in access mode, then the AP transmits broadcast traffic through all the
access interfaces: ETH0, ETH1, and all wireless subinterfaces in access mode.
In addition to using ETH0 and ETH1 as individual interfaces, you can combine them into an aggregate
interface (agg0) to increase throughput, or combine them into a redundant interface (red0) to increase
reliability. The logical red0 and agg0 interfaces support all the settings that you can configure for Ethernet
interfaces except those pertaining to physical link characteristics such as link speed. See the sections below
for configuration information.

Aggregate Interface

You can increase throughput onto the wired network by combining ETH0 and ETH1 into a single logically
aggregated interface called "agg0". The aggregate interface effectively doubles the bandwidth that each
physical interface has when used individually. In this configuration, both Ethernet ports actively forward
traffic, the AP applying an internal scheduling mechanism based on the source MAC address of each
packet to send traffic through the aggregate member interfaces. To configure an aggregate interface,
enter the following commands:
interface eth0 bind agg0
interface eth1 bind agg0
In addition to configuring the AP, you must also configure the connecting switch to support EtherChannel.
For example, the following commands bind two physical Ethernet ports—0/1 and 0/2—to the logical
interface port-channel group 1 on a Cisco Catalyst 2900 switch running Cisco IOS 12.2:
Switch#conf t
Switch(config)#interface port-channel 1
Switch(config-if)#switchport mode access
Switch(config-if)#spanning-tree portfast
Switch(config-if)#exit
Switch(config)#interface fastEthernet 0/1
Switch(config-if)#switchport mode access
Switch(config-if)#channel-group 1 mode on
Switch(config-if)#spanning-tree portfast
Switch(config-if)#exit
Switch(config)#int fastEthernet 0/2
Switch(config-if)#switchport mode access
Switch(config-if)#channel-group 1 mode on
Switch(config-if)#spanning-tree portfast
Switch(config-if)#exit
Switch(config)#exit
Switch#wr mem
Finally, you must cable the Cisco switch and the AP together: Cisco 0/1 to AP eth0, and Cisco 0/2 to AP eth1.
112
R I
EDUNDANT NTERFACES
112. When both interfaces are connected to the network and are in
"Aggregate
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