An AR cannot connect to an ACS

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1. Ensure that the AR can ping the ACS successfully.
2. Ensure that the AR is configured with the same URL as the ACS.
3. Run the undo cwmp enable command and then run the cwmp enable command in the CWMP view of the AR to trigger a session connection.
4. If no connection is established, the AR and ACS may fail to exchange packets. Use a tool to obtain packets on the ACS to locate the packet exchange failure. After the packet exchange failure is rectified, perform step 3 again to trigger a session connection.

Other related questions:
How can an AR router correctly connect to an ACS
1. Ensure that the AR router can ping the ACS successfully. 2. Ensure that the AR router is configured with the same URL as the ACS. 3. Run the undo cwmp enable command and then the cwmp enable command in the CWMP view of the AR router to trigger a session connection. 4. If no connection is established, the AR router and ACS may fail to exchange packets. Capture packets on the ACS to locate the packet exchange failure. After the packet exchange failure is rectified, perform step 3 again to trigger a session connection.

The ppp-mp interface of an AR router cannot be connected
MP problems of AR routers can be located based on the following roadmap: 1. MP interfaces transmit data by packets, which cannot be modified. 2. AR routers only support the binding of interfaces of the same card. If the binding cannot be performed on cards equipped with two E1 interfaces, perform it on cards equipped with eight E1 interfaces. 3. Focus on member interfaces when locating MP interface problems because most MP interface problems are caused by the member interfaces. 4. In products with earlier versions, out-of-order problems occur on MP interfaces, which results in the stalling of videos. Use products with V200R0003 and later versions. If the state of the E1 interface of an AR router is not Up, check whether the state of the member E1 interface is not Up. If the E1 interface of an AR router cannot communicate with other devices properly, check whether packet losses occur on the member E1 interface.

Why cannot an AP go online when the AR functions as an AC
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Maximum number of APs allowed to connect to an AR router used as the AC
1.AR100&AR110&AR120&AR150&AR160&AR200, AR100-S&AR110-S&AR120-S&AR150-S&AR160-S&AR200-S, AR500&AR510: 8; 2.AR1200 series, AR2201-48FE, AR2202-48FE, AR2204, AR2204-51GE-P, AR2204-51GE, AR2204-51GE-R, AR2204-27GE-P, AR2204-27GE, AR2204E, AR2204E-D, AR1200-Sseries, AR2201-48FE-S, AR2204-S, SRG1300series, SRG2304: 12; 3.AR2220-AC,AR2220-DC,AR2220L-AC,AR2220L-DC, AR2220E, AR2240(SRU40,SRU60), AR3260(SRU40,SRU60), AR2220-S, AR2240-S(SRU40), AR3260-S(SRU40), SRG2320-AC, SRG2320-DC, SRG2320E, SRG3300series(SRU40,SRUC): 16; 4.AR2240(SRU80, SRU100,SRU100E), AR3260(SRU80,SRU100,SRU100E), AR3260E-S(SRU100E), SRG3300series(SRU80,SRUF,SRU100E): 32; 5.AR2240(SRU200,SRU200E), AR3260(SRU200,SRU200E), SRG3300series(SRU200,SRU200E), MSP20(NE16EX-6): 64; 6.AR2240(SRU400), AR3260(SRU400), MSP40(NE16EX-8): 128;

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