WLAN clients cannot ping each other

[t_leinad@hotmail.com]

This topic has been addressed already but I haven't been able to solve it.
I have the Openwrt router with 2 AP's running in the same network address family. The router has a static IP that ends in 1. The AP's end in 2 and 3, static addresses also.
The DHCP server is set to send addresses from x.x.x.100 to x.x.x.150. I have all my known clients with static IP's.
I became aware of this problem when I needed to print a document after my router replacement. I cannot ping my printer if both clients (Laptop and printer) are connected to the wireless network from the router. It happens only in this case.
I know know that it happens with every client that when connected to the WLAN of the router.

"From x.x.x.x icmp_seq=6 Destination Host Unreachable"

I have tried the "isolation" setting. The hairpin of the phy0-ap0 becomes "1" after reboot, but I have tried to put it to "0" with no success.

My expertise is not networking. I consider myself mostly self taught in the matter. This issue is making my head spin. Help will be very appreciated.

Best regards

Code: Select all

{ 
        "kernel": "6.1.57", 
        "hostname": "FriendlyWrt", 
        "system": "ARMv8 Processor rev 0", 
        "model": "FriendlyElec NanoPi R5C", 
        "board_name": "friendlyelec,nanopi-r5c", 
        "release": { 
                "distribution": "OpenWrt", 
                "version": "23.05.5", 
                "revision": "r24106-10cc5fcd00", 
                "target": "rockchip/armv8", 
                "description": "OpenWrt 23.05.5 r24106-10cc5fcd00" 
        } 
}

[alessiakunde]

This topic has been addressed already but I haven't been able to solve it.
I have the Openwrt router with 2 AP's running in the same network address family. The router has a static IP that ends in 1. The AP's end in 2 and 3, static addresses also.
The DHCP server is set to send addresses from x.x.x.100 to x.x.x.150. I have all my known clients with static IP's.
I became aware of this problem when I needed to print a document after my router replacement. I cannot ping my printer if both clients (Laptop and printer) are connected to the wireless network from the router. It happens block blast only in this case.
I know know that it happens with every client that when connected to the WLAN of the router.

"From x.x.x.x icmp_seq=6 Destination Host Unreachable"

I have tried the "isolation" setting. The hairpin of the phy0-ap0 becomes "1" after reboot, but I have tried to put it to "0" with no success.

My expertise is not networking. I consider myself mostly self taught in the matter. This issue is making my head spin. Help will be very appreciated.

Best regards

Code: Select all

{ 
        "kernel": "6.1.57", 
        "hostname": "FriendlyWrt", 
        "system": "ARMv8 Processor rev 0", 
        "model": "FriendlyElec NanoPi R5C", 
        "board_name": "friendlyelec,nanopi-r5c", 
        "release": { 
                "distribution": "OpenWrt", 
                "version": "23.05.5", 
                "revision": "r24106-10cc5fcd00", 
                "target": "rockchip/armv8", 
                "description": "OpenWrt 23.05.5 r24106-10cc5fcd00" 
        } 
}

Go to System > System Log or Status > Kernel Log.
Look for any errors or warnings related to your wireless interface (wlan0, ath, mt76, etc.) around the time you try to ping.
6. Multicast/Broadcast Issues (e.g., for printer discovery)
While "ping" is unicast, printer discovery often relies on multicast (Bonjour/mDNS, UPnP). If your "Destination Host Unreachable" is specific to the printer and not just any client, multicast issues could be a factor.