Which UDP port numbers are used for exchange mobility packets in an AireOS wireless deployment?
Which UDP port numbers are used for exchange mobility packets in an AireOS wireless deployment?
In an AireOS wireless deployment, the UDP port numbers used for exchanging mobility packets are UDP 16666 for the control plane and UDP 16667 for the data plane. This is because AireOS prior to release 8.5 uses UDP 16666 for control traffic and, if encrypted mobility tunnels are enabled, it uses UDP 16667 for data traffic instead of EoIP (IP protocol 97). Therefore, the correct answer is UDP 16666 for control plane and UDP 16667 for data plane.
The key is UDP ports. IP protocol 97 is not UDP.
Seems A is correct https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107188-mobility-groups-faq.html UDP 16666 for tunnel control traffic IP protocol 97 for user data traffic
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
Cisco WLCs exchange mobility traffic with each other using various tunneling methods, depending on the controller platform. The most recent platforms, such as the Catalyst 9800, transport mobility control messages over encrypted CAPWAP tunnels. Client data traffic is also transported over CAPWAP tunnels, but encryption is optional. Legacy controller platforms that are based on AireOS software prior to release 8.5 transport mobility messages over Ethernet-over-IP (EoIP) tunnels (IP protocol 97) and UDP port 16666. AireOS platforms running release 8.5 or later support encrypted CAPWAP.
From Cisco ENWLSD course, it is A.
D is correct, as stated below EoIP is not UDP and the question specifically ask for UDP.
Legacy details: Control plane was UDP16666 and data plane was IP97 The question is asking for UDP ports. This eliminates answer A because 97 is IP and not UDP. Correct answer is D.
16666 and 16667 and 97 are required for mobility (16666, 16667 are ports, EoIP is PROTOCOL 97)
UDP 16666 = data plane UDP 16667 = control plane
16667 for controlling, not for data.
Because the questions asks for UDP, we should pick the wrong answer? 16667 is never mentioned in the Official Cisco Cert Guide. This is why the exam is so hard. Pure trickery on Cisco's end! I'll stick with "A".
A is correct. 16667 is never mentioned in the entire book! AireOS software prior to release 8.5 transport mobility messages over Ethernet-over-IP (EoIP) tunnels (IP protocol 97) and UDP port 16666
from study guide: Legacy controller platforms that are based on AireOS software prior to release 8.5 transport mobility messages over Ethernet-over-IP (EoIP) tunnels (IP protocol 97) and UDP port 16666. AireOS platforms running release 8.5 or later support encrypted CAPWAP. AND https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107188-mobility-groups-faq.html
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
The question doesn't mention encryption., and without it, in a purely AireOS wireless environment, A is correct.