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45	45
46	46	**Step 1: Add application**
47	47
48		-[[image:image-20230702094608-1.png||height="537" width="1015"]]
	48	+[[image:image-20240831154333-1.png||height="553" width="1074"]]
49	49
50	50
51	51	**Step 2：Fill name**
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629	629	[[image:image-20220531174046-19.png]]
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	632	+(% class="wikigeneratedid" %)
	633	+= 9.  Chirpstack Multicast Configuration =
	634	+
	635	+
	636	+== 9.1  Introduction ==
	637	+
	638	+ChirpStack has support for creating multicast-groups to which devices can be assigned. When enqueueing a downlink payload for a multicast-group, ChirpStack will analyze which gateways must be used for broadcasting to cover the complete multicast-group. This means that potentially, a single multicast downlink payload will be emitted multiple times.
	639	+
	640	+Multicast can be used for the following device-classes:
	641	+
	642	+* Class-B
	643	+* Class-C
	644	+
	645	+
	646	+== 9.2 Example to configure chirpstack Multicast ==
	647	+
	648	+
	649	+This section illustrates how to configure chirpstack Multicast. Below is the network structure, we use our LPS8v2 as the LoRaWAN gateway and SN50v3-LB as the LoRaWAN end-node here.
	650	+
	651	+
	652	+
632	632	= 9.  Multiply Uplink in ChirpStack =
633	633
634	634
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999	999
1000	1000	The user can Disable frame-counter validation on the chirpstack node and this warning message will not appear in the logs.
1001	1001
1002		-[[image:https://qiye.aliyun.com/attachment/downloadex?ri=%2Falimail%2FinternalLinks%2FrefreshToken&o=1&et=normal&ext=png&e=kilight%40dragino.cc&f=008dd83c-c893-43e6-8ad3-731d3b8d7be0&m=2_0%3ADzzzzyNOXCB%24---.YRE7agI&n=image001.png]][[image:image-20240717085339-1.jpeg]]
1003	1003
1004		-[[image:image-20240717090537-2.jpeg||height="589" width="1078"]]
	1024	+The packet is retransmitted because the node device has enabled the acknowledgment uplink packet mode and the node cannot receive the ACK acknowledgment packet delivered by the gateway.
1005	1005
1006	1006
	1027	+**The possible reasons are: **
	1028	+
	1029	+~1. The signal of the node device and the gateway is not good
	1030	+
	1031	+2. Too many node devices affect the downlink of the gateway
	1032	+
	1033	+
	1034	+[[image:image-20240717085339-1.jpeg]]
	1035	+
	1036	+
	1037	+* **Disable frame-counter validation**
	1038	+
	1039	+[[image:image-20240717102613-5.png||height="803" width="1211"]]
	1040	+
	1041	+
	1042	+* **Result**
	1043	+
1007	1007	[[image:image-20240717092428-4.jpeg]]
1008	1008
	1046	+
1009	1009	== 13.4  How to get the log information of the node？ ==
1010	1010
1011	1011

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