思科无线AP获取的DHCP地址与实际的地址不一致

[openlittlemoon]

请教各位大神一个问题，
我这边是思科无线控制器3504， 注册了AP， 关联了SSID， 终端去获取IP地址时， 获取的DHCP是1.1.1.1（实际上的DHCP不是这个地址）， 请教各位这在哪里设置呀，
其他地址都是正确的，

[openlittlemoon]

这个1.1.1.1应该是控制器的虚拟IP, 找不到在哪设置，在线等。。。

[Rps-Cheers]

openlittlemoon 发表于 2020-12-26 15:40
这个1.1.1.1应该是控制器的虚拟IP, 找不到在哪设置，在线等。。。

你好，
你的virtual interface的IP地址应该是1.1.1.1
对应WLC来说，类似于DHCP和WEB AUTH都需要经过virtual interface，这个接口很重要，这是预期行为。在终端（DHCP Client）看到的Server就是1.1.1.1
如下是思科的解释：
Virtual Interface
The virtual interface is used to support mobility management, Dynamic Host Configuration Protocol (DHCP) relay, and embedded Layer 3 security such as guest web authentication. It also maintains the DNS gateway host name used by Layer 3 security and mobility managers to verify the source of certificates when Layer 3 web authorization is enabled.
Specifically, the virtual interface plays these two primary roles:
Acts as the DHCP server placeholder for wireless clients that obtain their IP address from a DHCP server.
Serves as the redirect address for the web authentication login page.
https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_010011101.html
谢谢

[Rps-Cheers]

openlittlemoon 发表于 2020-12-26 15:40
这个1.1.1.1应该是控制器的虚拟IP, 找不到在哪设置，在线等。。。

可以在CLI界面通过 show interface summary查看。或者在GUI通过Controller > Interfaces 处查看，点击virtual即可进入修改。
如果CLI修改的话，使用如下命令：
Step 1
Enter the show interface detailed virtual command to view the current virtual interface settings.
Step 2
Enter the config wlan disable wlan-number command to disable each WLAN that uses the virtual interface for distribution system communication.
Step 3
Enter these commands to define the virtual interface:
config interface address virtual ip-address
Note
For ip-address , enter a valid, unassigned, and unused gateway IP address.
config interface hostname virtual dns-host-name
Step 4
Enter the reset system command. At the confirmation prompt, enter Y to save your configuration changes to NVRAM. The controller reboots.
Step 5
Enter the show interface detailed virtual command to verify that your changes have been saved.

[ilay]

将DHCP Proxy禁用掉就可以了
在WEB管理界面， Controller-> Advanced-DHCP- "Enable DHCP Proxy" 去掉该项的勾选，然后apply即可
或者在单独的Interface中设置，Controller->Interfaces修改对应的interface,将DHCP Proxy Mode设置为Disabled