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Large CAPWAP packets may get lost, between an AP and a 9800 seriesl controller.
Seen with small-MTU WAN paths between the AP and the 9800.
If the WAN is failing to deliver ICMP "DF set but need to fragment" messages to the CAPWAP endpoints, fix the WAN.
This enhancement, in 17.15.3/17.17, implements a new command in the AP join profile: 9800(config-ap-profile)#capwap pmtu ipv4 ? Static path MTU value (576 - 1485) and 0 to disable.
Cisco Integration
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