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An engineer is configuring a centralized set of controllers for separate facilities. Which two Cisco wireless architectures must be used to ensure flexible sizing of WLAN to VLAN mappings? (Choose two.)
Answer: AC
Refer to the exhibit. An engineer is about to establish a mobility peer connection between a Cisco Catalyst 9800-CL version 16.10.1e and Cisco AireOS 5520 version 8.8.120.0. The data path between the 9800-CL and AireOS 5520 is down, but its control path is up. Based on the configuration, what is the cause of the issue?
Answer: B
Answer is correct. A is not correct, if the hash key would be wrong, control path wouldnt come up in the first place. C is not correct. Secure Mobility is enabled by default on 9800 and therefore needs to be enabled on aireos. keyword is 'encrypt enable' on 2nd Line of AireOS konfig. D is not correct. case-sensitive doesnt matter. So B is the answer. Though on 9800 config there is an error: wireless mobility mac-address is with wrong mac. Should be 9800 own mac-address configured.
Source: Adapted from community discussion — Gab99
APs in a remote office recently have been converted from local mode to FlexConnect to take advantage of the local switching. After the change, remote wireless users report voice quality issues and bad quality on wireless IP phones while roaming. A debug is performed, and it is noticed that the 802.11r Fast Transition is not working as expected, like on local mode AP, though the same WLAN configuration is in place. What is the cause of the issue regarding the FlexConnect APs?
Answer: C
In 8.1 and earlier releases, this feature is not supported on access points in FlexConnect mode. In Release 8.2, this restriction is removed.802.11r fast roaming works only if the APs are in the same FlexConnect group. https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/content/dam/en/us/td/docs/wireless/controller/technotes/80211r-ft/b-80211r-dg.html.xml#:~:text=802.11r%20fast%20roaming%20works%20only%20if%20the%20APs,standalone%20mode.%20EAP%20LEAP%20method%20is%20not%20supported.
Source: Adapted from community discussion — Bapu20
An enterprise is using a Cisco AireOS controller and Wi-Fi 6 APs. The controller is installed in the head office, and the employees primarily use Apple OS devices. The APs broadcast WLAN ENT-WLAN406558520-1 for the employees and a guest WLAN with similar naming. What needs to be enabled on the controller to optimize roaming?
Answer: B
This is an "onboarding problem" with two (2) SSIDs Explanation: When fast SSID changing is enabled, the controller allows clients to move between SSIDs. When the client sends a new association for a different SSID, the client entry in the controller connection table is cleared before the client is added to the new SSID. When fast SSID changing is disabled, the controller enforces a delay before clients are allowed to move to a new SSID. Reference: https://rscciew.wordpress.com/2014/06/07/fast-ssid-change/
Source: Adapted from community discussion — peer1024
An engineer is performing a predictive wireless design for a medical treatment environment, which requires data and voice services. What is the minimum requirement for the design?
Answer: D
Answer is D: "Remember, for voice services, the goal is to have at least two (2) APs heard at -67 dBm or greater at all times." https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/116057-site-survey-guidelines-wlan-00.html
Source: Adapted from community discussion — Mimimimimi
Which UDP port numbers are used for exchange mobility packets in an AireOS wireless deployment?
Answer: D
The question is asking for the UDP ports, that would remove the IP protocol 97 from the options. "If encrypted mobility tunnel is in enabled state, the data traffic is encrypted and the controller uses UDP port 16667, instead of EoIP, to send the data traffic." https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107188-mobility-groups-faq.html#anc13
Source: Adapted from community discussion — JONATHGA
How should the concept of mobility domains and mobility groups be explained to a customer?
Answer: C
C is the better answer. MD: WLC in the same domain, can communiacte MG: WLC in the same group, constrains distribution of client security context.
Source: Adapted from community discussion — Ram0n_Aya1a
An engineer must ensure that the new wireless LAN deployment can support seamless roaming between access points using a standard based on an amendment to the 802.11 protocol. Which protocol must the engineer select?
Answer: C
Refer to the exhibit. A client roams between two APs that are registered to two different controllers, where each controller has an interface in the client subnet. Both controllers are running AireOS. Which scenario explains the client roaming behavior?
Answer: A
I read again and my bad: A is the correct answer, both WLC are in the SAME subnet, hence no tunnel is added at least the WLC are in different subnets. A is correct. Sorry for the confusion
Source: Adapted from community discussion — Johnconnor2021
An engineer has configured guest anchoring for a newly created SSID however, the mobility tunnels are not up, and EPING is failing from the foreign WLC to the anchor WLC. Which traffic flow must be allowed at the firewall to enable the communication?
Answer: B
B - "(...)Mobility data traffic is carried via Ethernet over IP (EoIP) which is IP protocol 97. This is the IP protocol number, not a TCP/UDP port value. Your firewall rules should allow IP protocol 97 traffic between your WLCs. For some background reading on EoIP, please see RFC3378 (...)" https://community.cisco.com/t5/wireless/eping-on-ip-port-97/td-p/1782329
Source: Adapted from community discussion — Johnconnor2021
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