Which two options are limitations of using an AP as a workgroup bridge? (Choose two.)
A. Only factory-configured MAPs can support WGB mode.
B. MAPs that are configured in WGB mode do not answer S36 radio measurement requests.
C. A limited subset of Layer 2 security types are supported for wireless clients of a WGB.
D. There is a limit of 20 wired client devices.
E. Multiple VLANs are not supported for wireless clients.
D,E IS OK
Guidelines for Configuration
•We recommend using a 5-GHz radio for the uplink to Mesh AP infrastructure so you can take advantage of a strong client access on two 5-GHz radios available on mesh access points. A 5-GHz band allows more Effective Isotropic Radiated Power (EIRP) and is less polluted. In a two-radio WGB, configure 5-GHz radio (radio 1) mode as WGB. This radio will be used to access the mesh infrastructure. Configure the second radio 2.4-GHz (radio 0) mode as Root for client access.
•On the Autonomous access points, only one SSID can be assigned to the native VLAN. You cannot have multiple VLANs in one SSID on the autonomous side. SSID to VLAN mapping should be unique because this is the way to segregate traffic on different VLANs. In a unified architecture, multiple VLANs can be assigned to one WLAN (SSID).
•Only one WLAN (SSID) for wireless association of the WGB to the access point infrastructure is supported. This SSID should be configured as an infrastructure SSID and should be mapped to the native VLAN.
•A dynamic interface should be created in the controller for each VLAN configured in the WGB.
•A second radio (2.4-GHz) on the access point should be configured for client access. You have to use the same SSID on both radios and map to the native VLAN. If you create a separate SSID, then it is not possible to map it to a native VLAN, due to the unique VLAN/SSID mapping requirements. If you try to map the SSID to another VLAN, then you do not have multiple VLAN support for wireless clients.
•All Layer 2 security types are supported for the WLANs (SSIDs) for wireless client association in WGB.
•This feature does not depend on the AP platform. On the controller side, both mesh and non-mesh APs are supported.
•There is a limitation of 20 clients in the WGB. The 20-client limitation includes both wired and wireless clients. If the WGB is talking to autonomous access points, then the client limit is very high.
•The controller treats the wireless and wired clients behind WGB in the same manner. Features such as MAC filtering and link test are not supported for wireless WGB clients from the controller.
•If required, you can run link tests for a WGB wireless client from autonomous AP.
•Multiple VLANs for wireless clients associated to WGB are not supported.
•Up to 16 multiple VLANs are supported for wired clients behind WGB from the 7.0 release and later releases.
•Roaming is supported for wireless and wired clients behind WGB. The wireless clients on the other radio will not be dissociated by the WGB when an uplink is lost or in a roaming scenario.
We recommend that you configure radio 0 (2.4 GHz) as a Root (one of the mode of operations for Autonomous AP) and radio 1 (5 GHz) as WGB.
B & D
B correct because WGB mode do not respond to broadcast Radio Measurement Requests from CCX Location Measurement. Clients that do not support S36 Radio Measurement will ignore any Radio Measurement Requests that are received.
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/WiFiLBS-DG/wifich3.html
D correct because The WGB supports a maximum of 20 wired clients. If you have more than 20 wired clients, use a bridge or another device.
https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_01110001.html
E incorrect because this,
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/service-set-identifier-ssid/211293-Configure-Work-Group-Bridge-WGB-Multip.html
D,E
Refer to:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_01110001.html
The WGB supports a maximum of 20 wired clients. If you have more than 20 wired clients, use a bridge or another device.
VLANs are not supported for use with WGBs.
B and D are corrects
B E
Refer to the following web site to confirm the answer B:
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/WiFiLBS-DG/wifich3.html