H3C Technologies H3C WA2600 Series WLAN Access Points - Manual (Page 74)

10-6
Figure 10-6 Multiple ESS network
Generally, Fat AP can provide more than one logical ESS at the same time. The configuration of ESS in
Fat AP can broadcast the current information of ESS by Beacon or Probe response frames. Client can
select an ESS it is interested to join.
The different ESS domains can be configured on the fat AP. The fat AP can be configured to allow
advertising and accepting Clients in these ESS domains once there credentials are accepted.
Single ESS Multiple BSS (The multiple radio case)
This topology describes a usage where a fat AP has more than one radio in single logical administration.
Both radios support same service set in the same ESS; but since the coverage area is logically different,
they belong to different BSSs.
Figure 10-7 Single ESS Multiple BSS network
FAT AP
Gateway
Client 2
Internet
Radio 2
Radio 1
Client 1
ESS 1
ESS 1
BSS 2
BSS 1
This can be used in scenarios where 802.11a and 802.11b/g need to be supported together. Figure 10-7
shows two clients connected to different radios but belonging to the same ESS and different BSSs.