Cisco Bug: CSCvt79194 - C9800 clients associated to Wave2 AP having local switching WLAN with native VLAN cannot resolve ARP
Sep 19, 2020
- Cisco Aironet 1850 Series Access Points
Known Affected Releases
Symptom: AP blocks ARP Request coming from associated client towards another associated client. Hence, these clients associated to the same AP cannot communicate each other. Conditions: Following conditions should meet simultaneously. - WLC is Catalyst9800 series (-40/-80/-CL) - IOS-XE version 16.11.1c and 16.12.3 has been confirmed to have this problem. 17.1 or later are not tested at this time. - AP runs AP-COS. On the other hand, IOS AP such as AP3702 does not see this problem. - WLAN is local switching - Flex profile dose not have arp-caching enabled - Access policy in Policy profile maps VLAN to AP native VLAN (used by CAPWAP).
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