I followed this tutorial to set my RPi 4B up. In my basement, I have my RPi connected via cable and want to bridge a new WiFi AP (as in the last part of that post above).
The first time, everything worked fine, I was able to connect to my RPi Wifi network with my phone (or other devices) and had an address assigned by the DHCP server on my router/modem.
After a few restarts and/or after docker installation, I can't connect anymore. Android phones are stuck at "Obtaining IP address" and another computer connects, but doesn't get an IP anymore (logs are indicating that DHCP has not returned an address).
I am able to ping/curl public websites on the RPi (though it seems I have to go through the bridge via ping -I br0 -c3 google.com (-I eth0 doesn't work)).
How can I debug this?
I tried multiple restarts, restarting the services, all to no avail.
Edit: I set up my RPi to have a DNS server (pihole via docker). In order for other docker containers to use that one I changed the system's dns entries, so that I have:
➜ ~ cat /etc/resolv.conf
nameserver 192.168.0.30
nameserver 192.168.0.1
search hitronhub.home
I'm not sure, but those DNS entries should not affect DHCP on the bridge, right? I think it's more related to installing docker (or something else).
Here are a few information:
➜ ~ sudo cat /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
country=ca
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
app_scan=1
network={
ssid="Basement"
mode=2
frequency=5220
#key_mgmt=NONE # uncomment this for an open hotspot
# delete next 3 lines if key_mgmt=NONE
key_mgmt=WPA-PSK
proto=RSN WPA
psk="*pw*"
}
➜ ~ ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.30 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::d0d9:e2ff:fe3d:699a prefixlen 64 scopeid 0x20<link>
inet6 fd00:a84e:3f6c:9322:d0d9:e2ff:fe3d:699a prefixlen 64 scopeid 0x0<global>
ether d2:d9:e2:3d:69:9a txqueuelen 1000 (Ethernet)
RX packets 79139 bytes 5225897 (5.2 MB)
RX errors 0 dropped 23748 overruns 0 frame 0
TX packets 11782 bytes 1277671 (1.2 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
br-bb564efd3146: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.0.1 netmask 255.255.0.0 broadcast 172.20.255.255
inet6 fe80::42:2eff:fed1:d618 prefixlen 64 scopeid 0x20<link>
ether 02:42:2e:d1:d6:18 txqueuelen 0 (Ethernet)
RX packets 4470 bytes 412507 (412.5 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4454 bytes 462973 (462.9 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:9a:8c:47:de txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether dc:a6:32:9b:6e:cf txqueuelen 1000 (Ethernet)
RX packets 112304 bytes 21691931 (21.6 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 11842 bytes 1281443 (1.2 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 91 bytes 6848 (6.8 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 91 bytes 6848 (6.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
veth1032cc9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::2821:79ff:fe14:af4a prefixlen 64 scopeid 0x20<link>
ether 2a:21:79:14:af:4a txqueuelen 0 (Ethernet)
RX packets 907 bytes 272091 (272.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 924 bytes 128079 (128.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
veth19ee85a: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::7c0e:acff:fe85:96ac prefixlen 64 scopeid 0x20<link>
ether 7e:0e:ac:85:96:ac txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 39 bytes 2914 (2.9 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
veth89ca666: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::5cac:a7ff:fe80:bcb1 prefixlen 64 scopeid 0x20<link>
ether 5e:ac:a7:80:bc:b1 txqueuelen 0 (Ethernet)
RX packets 905 bytes 126613 (126.6 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 928 bytes 273641 (273.6 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vethb7b11d8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::6013:bcff:fe15:378a prefixlen 64 scopeid 0x20<link>
ether 62:13:bc:15:37:8a txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 42 bytes 3108 (3.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vethf67b8c4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::48ed:15ff:fe94:4f78 prefixlen 64 scopeid 0x20<link>
ether 4a:ed:15:94:4f:78 txqueuelen 0 (Ethernet)
RX packets 4469 bytes 475045 (475.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4483 bytes 464811 (464.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::dea6:32ff:fe9b:6ed0 prefixlen 64 scopeid 0x20<link>
ether dc:a6:32:9b:6e:d0 txqueuelen 1000 (Ethernet)
RX packets 439 bytes 93244 (93.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 15318 bytes 1517332 (1.5 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
➜ ~ sudo networkctl status
● State: routable
Address: 192.168.0.30 on br0
172.17.0.1 on docker0
172.20.0.1 on br-bb564efd3146
fd00:a84e:3f6c:9322:d0d9:e2ff:fe3d:699a on br0
fe80::dea6:32ff:fe9b:6ed0 on wlan0
fe80::d0d9:e2ff:fe3d:699a on br0
fe80::42:2eff:fed1:d618 on br-bb564efd3146
fe80::5cac:a7ff:fe80:bcb1 on veth89ca666
fe80::2821:79ff:fe14:af4a on veth1032cc9
fe80::48ed:15ff:fe94:4f78 on vethf67b8c4
fe80::6013:bcff:fe15:378a on vethb7b11d8
fe80::7c0e:acff:fe85:96ac on veth19ee85a
Gateway: 192.168.0.1 (Hitron Technologies. Inc) on br0
DNS: 192.168.0.1
Search Domains: hitronhub.home
Jun 09 05:34:41 rpi systemd-networkd[20792]: veth89ca666: Gained IPv6LL
Jun 09 05:34:41 rpi systemd-networkd[20792]: br-bb564efd3146: Gained IPv6LL
Jun 09 05:34:41 rpi systemd-networkd[20792]: br0: Gained IPv6LL
Jun 09 05:34:41 rpi systemd-networkd[20792]: wlan0: Gained IPv6LL
Jun 09 05:34:41 rpi systemd-networkd[20792]: Enumeration completed
Jun 09 05:34:41 rpi systemd[1]: Started Network Service.
Jun 09 05:34:41 rpi systemd-networkd[20792]: br0: netdev exists, using existing without changing its parameters
Jun 09 05:34:41 rpi systemd[1]: Starting Wait for Network to be Configured...
Jun 09 05:34:41 rpi systemd[1]: Finished Wait for Network to be Configured.
Jun 09 05:34:42 rpi systemd-networkd[20792]: br0: DHCPv4 address 192.168.0.30/24 via 192.168.0.1
➜ ~ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 1024 0 0 br0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.20.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-bb564efd3146
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 br0
192.168.0.1 0.0.0.0 255.255.255.255 UH 1024 0 0 br0
➜ ~ sudo networkctl status br0
● 4: br0
Link File: /usr/lib/systemd/network/99-default.link
Network File: /etc/systemd/network/12-br0_up.network
Type: bridge
State: routable (configured)
Driver: bridge
HW Address: d2:d9:e2:3d:69:9a
MTU: 1500 (min: 68, max: 65535)
QDisc: noqueue
IPv6 Address Generation Mode: eui64
Forward Delay: 15s
Hello Time: 2s
Max Age: 20s
Ageing Time: 5min
[0m Priority: 32768
STP: no
Multicast IGMP Version: 2
Cost: 2000
Port State: disabled
Queue Length (Tx/Rx): 1/1
Auto negotiation: no
Speed: 1Gbps
Address: 192.168.0.30 (DHCP4 via 192.168.0.1)
fd00:a84e:3f6c:9322:d0d9:e2ff:fe3d:699a
fe80::d0d9:e2ff:fe3d:699a
Gateway: 192.168.0.1 (Hitron Technologies. Inc)
DNS: 192.168.0.1
Search Domains: hitronhub.home
DHCP4 Client ID: IAID:0x767f1b5a/DUID
DHCP6 Client IAID: 0x767f1b5a
DHCP6 Client DUID: DUID-EN/Vendor:0000ab11b181b51f9e96a95a0000
Jun 09 02:19:25 rpi systemd-networkd[1649]: br0: netdev ready
Jun 09 02:19:25 rpi systemd-networkd[1649]: br0: Link UP
Jun 09 02:19:29 rpi systemd-networkd[1649]: br0: Gained carrier
Jun 09 02:19:29 rpi systemd-networkd[1649]: br0: DHCPv4 address 192.168.0.30/24 via 192.168.0.1
Jun 09 02:19:31 rpi systemd-networkd[1649]: br0: Gained IPv6LL
Jun 09 05:34:41 rpi systemd-networkd[1649]: br0: DHCPv6 lease lost
Jun 09 05:34:41 rpi systemd-networkd[20792]: br0: netdev ready
Jun 09 05:34:41 rpi systemd-networkd[20792]: br0: Gained IPv6LL
Jun 09 05:34:41 rpi systemd-networkd[20792]: br0: netdev exists, using existing without changing its parameters
Jun 09 05:34:42 rpi systemd-networkd[20792]: br0: DHCPv4 address 192.168.0.30/24 via 192.168.0.1
Let me know if you need more information, I'll amend this question.
Please don't suggest hostapd, unless the tutorial is totally out-of-date and should not be used anymore.
