桥接网络一般是解决光纤无法到达的无奈之举，Cisco的桥接链路技术比较成熟，稳定性实测还可以，用的也很普遍。
本文介绍Cisco FAT AP桥接配置实例，我使用的是3台Cisco 1532E 胖AP，软件版本是C1530 Software (ap1g3-K9W7-M), Version 15.2(4)JB3b，其它版本也应该通用。
逻辑拓扑图
配置实例
本文只列举了5.8G桥接的主要配置信息，2.4G桥接同理。
root AP配置
dot11 ssid TEST5G authentication open authentication key-management wpa version 2 wpa-psk ascii passwd5G interface Dot11Radio1 no ip address encryption mode ciphers aes-ccm ssid TEST5G antenna gain 0 peakdetect dfs band 3 block packet retries 64 drop-packet channel 5765 station-role root bridge bridge-group 1 bridge-group 1 spanning-disabled interface BVI1 ip address 172.17.50.111 255.255.255.0 ip default-gateway 172.17.50.1
其它常规配置：略
以上配置的SSID，加密类型，channel，station-role 可根据需要自行修改。
station-role几种常用的选择如下：station-role root bridge
station-role root bridge wireless-clients
station-role root access-point
station-role root ap-only
mesh1 AP配置
dot11 ssid TEST5G authentication open authentication key-management wpa version 2 wpa-psk ascii passwd5G interface Dot11Radio1 no ip address encryption mode ciphers aes-ccm ssid TEST5G antenna gain 0 peakdetect packet retries 64 drop-packet station-role non-root bridge bridge-group 1 bridge-group 1 spanning-disabled interface BVI1 ip address 172.17.50.222 255.255.255.0 ip default-gateway 172.17.50.1
其它常规配置：略
以上配置的SSID，加密类型，station-role 同样也可根据需要自行修改。
station-role几种常用的选择如下：station-role non-root bridge
station-role non-root bridge wireless-clients
station-role non-root wireless-clients
station-role workgroup-bridge
mesh2 AP配置
同mesh1 AP配置，略
桥接链路检查
配置完成后，在root AP上查看，可以看到我的两台mesh AP都已桥接到root AP上。
Root-1532E#
show cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone, D - Remote, C - CVTA, M - Two-port Mac Relay Device ID Local Intrfce Holdtme Capability Platform Port ID Mesh1-1532E Vi-Dot11 1 147 T I AIR-SAP15 Vi-Dot11 0 Mesh2-1532E Vi-Dot11 0 167 T I AIR-SAP15 Vi-Dot11 0
测试桥接链路信号质量
Root-1532E#
show dot11 associations802.11 Client Stations on Dot11Radio1: SSID [WPWGB5G] : MAC Address IP address IPV6 address Device Name Parent State bc16.f59e.xxx1 0.0.0.0 :: Br-client - bc16.f5a0.xxx1 Assoc bc16.f5a0.xxx2 172.17.50.107 :: bridge Mesh1-1532E self Assoc bc16.f5a1.xxx3 172.17.50.110 :: bridge Mesh2-1532E self Assoc
Root-1532E#
dot11 dot11Radio 1 linktest target bc16.f5a0.xxx2 Root-1532E#
terminal monitor Root-1532E#
dot11 dot11Radio 1 linktest Start linktest to bc16.f5a0.xxx2, 100 512 byte packets GOOD (2 % retries) Time Strength(dBm) SNR SNR Retries msec In Out In Out In Out Sent : 100, Avg 0 - 28 - 31 58 56 Tot: 0 4 Lost to Tgt: 0, Max 4 - 28 - 31 59 57 Max: 0 1 Lost to Src: 0, Min 0 - 29 - 33 58 55 Rates (Src/Tgt) mcs4 100/100 Linktest Done in 0.084 msec
通过以上测试，就可以知道Root AP和Mesh AP的信号强度，信噪比，重传率等信息。
-The End-
