本文使用比较简单容易理解的拓扑详细介绍了WC7520是如何跨三层注册AP，即AP跟WC7520接在不同的VLAN中的关联应用

固件版本

WC7520:V2.0.13_2015

WNDAP350:V2.0.1(为了更详细的介绍WC7520是如何跨三层发现AP并自动将AP升级成瘦AP，此文以WNDAP350胖AP固件V2.0.1为例)

GSM7352PS:V8.0.3.11

一、网络拓扑

三层交换机GSM7352PS上创建两个VLAN：

• ·VLAN10 :192.168.0.1/24，把1端口划分到VLAN10并且属于untag标记
• ·VLAN20: 192.168.1.1/24，把2端口划分到VLAN20并且属于untag标记
• ·在GSM7352PS上创建VLAN20的DHCP地址池为AP分配地址

二、配置说明

• ·WC7520的IP地址默认192.168.0.250，直接连GSM7352PS的同网段的VLAN10的第1端口
• ·WNDAP350默认IP地址192.168.0.237，由于要跨三层关联WC7520，所以要先把AP的IP地址改为自动获取，连到GSM7352PS的VLAN20的第2端口

三、注意事项

• ·由于WC7520跨三层发现AP时只能在AC上手动指定AP所在的网段，而且AP只能读取DHCP Option43 hex 0204XXXXXX信息来关联AP，XXXXXX代表AC的IP地址的16进制.
• ·三层交换机一定要支持DHCP SERVER功能，并且支持DHCP Option43 hex功能.
• ·在跨三层关联建议最好将AP的地址改为自动获取，否则跟所接VLAN网段不一致的话是无法从AC上跨三层发现AP的.

四、相关配置

1. GSM7352PS的主要配置
   (GSM7252PS) #show running-config
   !Current Configuration:
   !
   !System Description "GSM7252PS - 48-Port GE L2+ Managed Stackable PoE Switch with 2 10GE SFP+ ports"
   !System Software Version "8.0.3.11"
   !System Up Time"0 days 1 hrs 53 mins 40 secs"
   !Additional PackagesFASTPATH QOS，FASTPATH Multicast，FASTPATH IPv6，FASTPATH Stacking
   !Current SNTP Synchronized Time: Not Synchronized
   !
   vlan database
   vlan 10，20
   vlan routing 10 1
   vlan routing 20 2
   exit
   configure
   sntp client mode unicast
   ! sntp server status is active
   sntp server time-d.netgear.com
   stack
   member 1 7
   exit
   slot 1/0 8
   set slot power 1/0
   no set slot disable 1/0
   ipv6 router ospf
   exit
   ip routing
   line console
   exit
   line telnet
   exit
   line ssh
   exit
   spanning-tree configuration name "00-26-F2-F6-B3-10"
   !
   interface 1/0/1
   vlan pvid 10
   vlan participation include 10
   exit
   interface 1/0/2
   vlan pvid 20
   vlan participation include 20
   exit
   interface 1/0/49
   no auto-negotiate
   exit
   interface 1/0/50
   no auto-negotiate
   exit
   interface 1/0/51
   no auto-negotiate
   exit
   interface 1/0/52
   no auto-negotiate
   exit
   interface vlan 10
   routing
   ip address192.168.0.1255.255.255.0
   exit
   interface vlan 20
   routing
   ip address192.168.1.1255.255.255.0
   exit
   router rip
   exit
   router ospf
   exit
   service dhcp
   ip dhcp pool "vlan20"
   lease 0 8 0
   dns-server 61.144.56.100
   default-router 192.168.1.1
   network 192.168.1.0 255.255.255.0
   option 43 hex 0204.c0a8.00fa（192.168.0.250换算为16进制的值为c0a800fa)
   exit
   exit
    
2. WC7520的主要配置
   登陆WC7520的管理界面192.168.0.250，默认的用户名admin，密码password
   
   通过Access Point->Discovery->Discovery Wizard菜单关联AP，选择Factory default state，点NEXT
   
   因为是跨三层关联，选择Different L3 network-different VLANs or behind IP subnets，点NEXT
   
   输入AP所在网段的IP地址范围，点NEXT
   
   WC7520根据指定的IP段把发现的AP显示在列表中
   
   勾选上AC发现的AP，点ADD，在弹出来的密码框内输入AP的密码password
   
   WC7520首先会先将AP升级成瘦AP：Firmware upgrade required
   
   AP的升级过程大概需要5分钟左右，AP升级成功后就可以关联到WC7520：Connected
   

序号	日期	工程师	更新摘要
1	2012-04-06	Baowen He	文档归档