As shown in the figure, the wired user can connect to the printer but the wireless user cannot.
The fault is common. The troubleshooting roadmap is as follows (for reference only):
1, Check whether the printer can be pinged. The wired user can ping the printer but the wireless user cannot.
2, The network between the wireless user and printer is not reachable. Check whether basic entries, such as MAC address entries, ARP entries, and routing entries, are correct on the network devices.
3, Check whether ping packets are discarded due to some configurations, such as ACL and CAR.
4, Locate the node where packets are discarded segment by segment through packet header obtainment.
5, If WLAN devices discard the packets incorrectly, seek technical support from WLAN LMT.
The wired user is on the same Layer 2 network as the printer and therefore can use the printer. A Layer 3 network is deployed between the printer and wireless user. To make printer services available to the wireless user, you need to configure static routing on the printer.
Configure static routing on the printer to enable Layer 3 communication between the wireless user and printer.
Based on the fault symptom, you may incorrectly ascribe the fault to the wireless side. Actually, the wired network carries the wireless services. In most cases, the fault is not caused by the wireless side. It is illogical to attribute the fault to the WLAN in this case. When such a fault occurs, troubleshoot the fault according to the preceding steps.