What are the ESS, BSS, and SSID

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SSID: service set identifier.

ESS: extended service set, a group of all SATs in the same logical management domain. An ESS may contain multiple BSSs.

BSS: basic service set, an area covered by an AP. Each BSS is identified by a BSSID. The simplest WLAN contains only one BSS, and all STAs are in the BSS. To enable the STAs to communicate, disable STA isolation.

Other related questions:
WLAN-ESS and WLAN-BSS interface
Differences between ESS and BSS - Basic service set (BSS) is the basic service unit of WLAN. Typically, BSS consists of one AP and several STAs. - Extended service set (ESS) is a group of BSSs that share the same SSID. ESS solves the limited coverage problem caused by BSS. In most cases, BSS is used on Fat APs, while ESS on ACs. For wireless air interfaces, the service VLAN is typically set to PVID and untag VLAN. For example: int {wlan-bss|wlan-ess} 0 port hybrid pvid 10 port hybrid untag vlan 10 To change information such as the VLAN and domain for a WLAN-ESS or WLAN-BSS interface, you must unbind the service set from the AP and then the WLAN-BSS and WLAN-ESS interfaces from the service set.

What is SSID
SSID 1. SSIDs identify different wireless networks. For example, when you search for available wireless networks on your laptop, the displayed wireless network names are SSIDs. 2. Different devices can be configured with the same SSID, but different BSSIDs, that is, the MAC address. 3. BSSID is the mapping of an AP's MAC address. 4. If multiple SSIDs are the same, you can check whether APs are configured with the same SSID. Fat APs and ACs also share different SSIDs. 5. SSIDs are configured in a service set, and each one maps one service VLAN. If there are multiple address pools or VLANs, add a new service set.

Requirement for the SSID name
For V200R005 and earlier versions, the SSID name cannot contain Chinese characters. It is recommended that you change spaces into underscores (_).

What is the function of the domain configured on the WLAN-BSS interface of the AR router
On the AR router, the dot1x authentication domain command is used on a WLAN-BSS interface to configure a domain. - Authentication and accounting are performed for MAC address authentication users in the domain. - For the WLAN authentication process that is not associated with NAC, accounting is performed in the domain.

Sort SSIDs on STAs
The sorting of SSIDs is completed by STAs. APs cannot specify the SSID sorting.

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