台灣現行可用的WiFi 5G 通道與頻率有哪些?

 

  • 5250～5350MHz
（CH52 5260MHz
、CH56 5280MHz
、CH60 5300MHz
、CH64 5320MHz）
 
  •  5470～5725MHz
（CH100 5500MHz
、CH104 5520MHz
、CH108 5540MHz
、CH112 5560MHz
、CH116 5580MHz
、CH120 5600MHz
、CH124 5620MHz
、CH128 5640MHz
、CH132 5660MHz
、CH136 5680MHz
、CH140 5700MHz）
 
  •  5725～5825MHz
（CH149 5745MHz
、CH153 5765MHz
、CH157 5785MHz
、CH161 5805MHz
、CH165 5825MHz）
 

 

Controller 離線時, Guest Portal會有什麼狀況

Answer

When an AP cannot reach the controller, it goes into "SELFRUN" state.

In this state, it doesn't make sense to redirect the guests to the portal (controller) which is not reachable, so the AP will automatically allow guests to use the network without redirecting. Moreover:

  1. The guest access policies will still be effective (L2/L3 isolation) along with the restricted subnets feature
  2. The user group (bandwidth limiting, etc) associated with this WLAN will still be effective.
  3. When the controller comes back online (and the AP goes into MANAGED state), the guest portal redirection feature will restore automatically.

How to Configure "SELFRUN" State

The config.properties file needs to be placed under <unifi_base>/data/sites/<site id>/ directory because config properties are site related. Note: Prior to version 3, users were able to add/modify <unifi_base>/data/config.properties.

info_i_25x25.png Note: The location <unifi_base> will vary depending on your operating system. See this article for more information.
  
After adding/modifying the config.properties file, trigger a re-provision to all APs (NOT a restart). For example, toggle on/off the uplink monitor checkbox, or the SNMP.
 
To check whether the configuration has been taken in by the AP, SSH into the AP, execute 'cat cfg/mgmt',
you should see 'mgmt.selfrun_guest_mode=off' in the output.
 
 
# config.selfrun_guest_mode=pass # when controller is offline, automatically 
                                 # authorize all guests (all guest isolation 
                                 # / policy is still enforced)

# config.selfrun_guest_mode=off  # to disable all the guest SSIDs when controller
                                 # is not reachable. Note that "guest portal" must
                                 # be being used otherwise controller will NOT disable
                                 # guest SSIDs.
 



UniFi Controller 最低系統需求.

Operating System:

  • Ubuntu Desktop / Server 14.04 or 16.04 (recommended)
  • Debian 7 “Wheezy”, 8 "Jessie", 9 "Stretch" (recommended)
  • macOS Mavericks 10.9, 10.10 Yosemite, 10.11 El Capitan, 10.12 Sierra, 10.13 High Sierra (10.13 recommended)
  • Windows 7 or Windows 10 (recommended)
  • Windows Server 2008 or 2016 (recommended)

CPU: x86-64 Processor (Intel / AMD x64 Processors)*

RAM: 2GB*

Network: 100Mbps Wired Ethernet*

HDD: Minimum 10GB free (20GB or more preferred)*

Java: Java Runtime Environment (JRE) 8

Web Browser: Google Chrome

MongoDB: version 3.2 or later (Mongo is offered bundled: default bundled is 2.4.14 (for macOS and Windows only)).

*NOTE: Actual Storage, CPU, RAM and Network speed requirements will depend on many factors including the number of UniFi devices managed by the controller, number of clients, features enabled, and data retention settings. For database repair you require free space equal to the current database size, plus 2GB.