Check switch, router or firewall whether blocks the traffic or CAPWAP
port 5246.
Trace Route:
Use trace route to find the packets are dropped out on where.
Figure 76
Tera Term
> AP > Router
> traceroute <AC
-IP>
Use Wireshark capture CAPWAP packets between controller and managed
AP to check the status of network traffic.
5 How to know APs off-line cause by external factors?
Check the last offline time of off-line APs.
Last Offline Time: This displays the most recent time the AP went off-line. N/A
displays if the AP has either not come on-line or gone off-line since NXC last
started up.
Figure 77 MONITOR > Wireless > AP Information > AP List
If all the APs or a group of APs show offline at the same time, there might the
power supply issue on the PoE SW or configuration of SW.
Please check by following steps.
Does someone turn off the switch or some devices in the topology?
Does the switch block the port of VLAN for APs traffic?
Is the voltage stable in customer site?
If some of APs offline with random time, please check by following steps.
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