Cisco Cisco 5520 Wireless Controller 백서
Cisco vs Aruba Wireless Controllers
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DR150602D
Copyright © Miercom 2015
18 June 2015
Channels Available for APs
The RRM tests were evaluated for the 5GHz Channels. Available channels for both the vendors
were limited to UNII-1 (36, 40, 44, and 48) and UNII-3 (149, 153, 157, 161, and 165) channels,
allowing a total of nine 20MHz non-overlapping channels to select and bond with. The DFS
Channels (UNII-2 and UNII-2 extended) were excluded from the AP Channel list to create an
environment with an increased chance of channel overlapping especially when the five APs are
bonding on 40-MHz and 80-MHz channel widths. In addition, since Aruba ships with all DFS
channels disabled, the same configuration was mirrored on the Cisco controller to ensure an
apples-to-apples comparison. Restricting the number of channels for this test also helps to
determine at a system level how the radio manages the channels and widths when there is
limited spectrum for Wi-Fi, which again is a common occurrence in many wireless deployments
across different regulatory domains.
were limited to UNII-1 (36, 40, 44, and 48) and UNII-3 (149, 153, 157, 161, and 165) channels,
allowing a total of nine 20MHz non-overlapping channels to select and bond with. The DFS
Channels (UNII-2 and UNII-2 extended) were excluded from the AP Channel list to create an
environment with an increased chance of channel overlapping especially when the five APs are
bonding on 40-MHz and 80-MHz channel widths. In addition, since Aruba ships with all DFS
channels disabled, the same configuration was mirrored on the Cisco controller to ensure an
apples-to-apples comparison. Restricting the number of channels for this test also helps to
determine at a system level how the radio manages the channels and widths when there is
limited spectrum for Wi-Fi, which again is a common occurrence in many wireless deployments
across different regulatory domains.
Selection for Available Channel Widths on the Cisco and Aruba Controllers at Time of Testing
Bonded channel widths are achieved by using multiple 20-MHz channels. By bonding two 20MHz
channels together you get a 40-MHz wide channel, and bonding four 20-MHz channels together
forms a single 80-MHz wide channel.
With the DFS Channels disabled, both Cisco and Aruba had a choice of:
Nine 20 MHz non-overlapping channels
Four 40 MHz non-overlapping channels
Two 80 MHz non- overlapping channels
Conduct of RRM Tests
The RF spectrum in each case was managed by the respective Cisco and Aruba wireless
controllers, interacting with their respective access points. The tests exercised the choice of
channels, the channel-width choices, and the overlap of channels affect the overall throughput in
a typical office configuration.
Cisco and Aruba tests were run separately for each channel-width choice, with sufficient time
allowed for the configurations to settle down following each configuration change. All 25 clients
controllers, interacting with their respective access points. The tests exercised the choice of
channels, the channel-width choices, and the overlap of channels affect the overall throughput in
a typical office configuration.
Cisco and Aruba tests were run separately for each channel-width choice, with sufficient time
allowed for the configurations to settle down following each configuration change. All 25 clients
Source: Miercom June 2015