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Multicast traffic was impacted. If you run the 9800 exec command show platform hardware chassis active qfp feature wireless capwap cpp-client summary You will see that the source IP address is 0.0.0.0 rather than the WMI address. Example: cpp_if_hdl pal_if_hdl AP MAC Src IP Dst IP Dst Port Tun Type -------------------------------------------------------------------------------------------------- 0X35 0X90000001 0000.0000.0000 0.0.0.0 239.1.2.3 5247 MCAST
This bug affects the following 9800 platforms: C9800-80, C9800-40, CW9800-M, CW9800-H1/H2. It does not affect C9800-L or C9800-CL. Problem impacts a entral switching SSID. AP MOM status was UP. Multicast traffic was observed on the WLC from the source, but it did not reach the intended destination. Packet captures (EPC) collected from the WLC revealed that, when forwarding multicast traffic to the configured CAPWAP multicast group address, the WMI IP address was set to null (0.0.0.0). The source IP address of 0.0.0.0 was seen not only in the EPC, but was actually transmitted over the wire
Change the CAPWAP multicast group address using the command. wireless multicast x.x.x.x under the configuration mode. This will fix the problem temporarily, but will not keep the problem from recurring. So, monitor the source IP address used for MCAST in the output of the show platform hardware chassis active qfp feature wireless capwap cpp-client summary command, and if it ever goes to 0.0.0.0, reconfigure the wireless multicast address to be something else.
This commit CSCwq81750 does not completely fix this problem; also see CSCws18413 for the complete fix. The complete fix (both CSCwq81750 and CSCws18413) will be found in the following releases: 17.12.7, 17.15.4d, 17.15.5, 17.18.2. Additionally, SMUs are available for some earlier releases.
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