Hello!
I have formed a Thread network and I am trying to ping an external IPv4 address and that request is not being forwarded to the border router.
My OTBR is a Raspberry Pi with a nrf52840 USB dongle (with RCP) configured without the WiFi hotspot (NETWORK_MANAGER=0 ./script/setup) and then I have a nrf52840DK connected to the network as well. This is the neighbor table of the OTBR:
pi@raspberrypi:~ $ sudo ot-ctl neighbor table| Role | RLOC16 | Age | Avg RSSI | Last RSSI |R|D|N| Extended MAC |+------+--------+-----+----------+-----------+-+-+-+------------------+| R | 0x5c00 | 17 | -59 | -60 |1|1|1| deb6fa6fcd9f8438 |Done
Then I have configured the NAT64 using the OpenThread guide and I would expect that I could ping, for example, Google's DNS server from the nrf52840DK CLI interface, but I cannot:
uart:~$ ot ping 64:ff9b::808:808Done
I am having trouble identifying the source of the problem, so I have tried monitoring the wpan0 interface of the OTBR while performing a ping but got no packets:
pi@raspberrypi:~ $ sudo tcpdump -vnni wpan0tcpdump: listening on wpan0, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes^C0 packets captured0 packets received by filter0 packets dropped by kernel
I get the same results while monitoring the nat64 interface.
ip route
pi@raspberrypi:~ $ ip routedefault via 192.168.1.1 dev eth0 proto dhcp metric 100default via 192.168.1.1 dev eth0 src 192.168.1.155 metric 202192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.155 metric 100192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.155 metric 202192.168.255.0/24 dev nat64 scope link
route -n -A inet6
pi@raspberrypi:~ $ route -n -A inet6Kernel IPv6 routing tableDestination Next Hop Flag Met Ref Use If::1/128 :: U 256 2 0 lo64:ff9b::/96 :: U 1024 1 0 nat64fd75:2923:1516:67d1::/64 :: U 256 3 0 wpan0fe80::/64 :: U 100 2 0 eth0fe80::/64 :: U 256 3 0 wpan0fe80::/64 :: U 256 1 0 nat64::/0 :: !n -1 1 0 lofd75:2923:1516:67d1::/128 :: Un 0 5 0 wpan0fd75:2923:1516:67d1:0:ff:fe00:800/128 :: Un 0 4 0 wpan0fd75:2923:1516:67d1:0:ff:fe00:fc00/128 :: Un 0 2 0 wpan0fd75:2923:1516:67d1:3dae:936:17f8:c561/128 :: Un 0 2 0 wpan0fe80::/128 :: Un 0 5 0 wpan0fe80::/128 :: Un 0 3 0 nat64fe80::1cfd:421b:da60:6b14/128 :: Un 0 2 0 nat64fe80::b8f8:658d:7fde:a308/128 :: Un 0 3 0 eth0ff00::/8 :: U 256 1 0 wpan0ff00::/8 :: U 256 5 0 eth0ff00::/8 :: U 256 1 0 nat64::/0 :: !n -1 1 0 lo
ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.155 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::b8f8:658d:7fde:a308 prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:04:c2:86 txqueuelen 1000 (Ethernet)
RX packets 57487 bytes 3411772 (3.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 58178 bytes 24493952 (23.3 MiB)
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 139 bytes 12096 (11.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 139 bytes 12096 (11.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
nat64: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500
inet6 fe80::1cfd:421b:da60:6b14 prefixlen 64 scopeid 0x20<link>
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 500 (UNSPEC)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 9 bytes 684 (684.0 B)
TX errors 0 dropped 1 overruns 0 carrier 0 collisions 0
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether ba:1b:bd:22:b0:10 txqueuelen 1000 (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
wpan0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1280
inet6 fe80::4886:c456:2283:cae4 prefixlen 64 scopeid 0x20<link>
inet6 fd75:2923:1516:67d1:0:ff:fe00:fc00 prefixlen 64 scopeid 0x0<global>
inet6 fd75:2923:1516:67d1:3dae:936:17f8:c561 prefixlen 64 scopeid 0x0<global>
inet6 fd75:2923:1516:67d1:0:ff:fe00:800 prefixlen 64 scopeid 0x0<global>
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 500 (UNSPEC)
RX packets 7 bytes 557 (557.0 B)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 12 bytes 1493 (1.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ip addr
pi@raspberrypi:~ $ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether b8:27:eb:04:c2:86 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.155/24 brd 192.168.1.255 scope global dynamic noprefixroute eth0
valid_lft 2350sec preferred_lft 2350sec
inet6 fe80::b8f8:658d:7fde:a308/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether ba:1b:bd:22:b0:10 brd ff:ff:ff:ff:ff:ff
4: wpan0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1280 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/void
inet6 fd75:2923:1516:67d1:0:ff:fe00:fc00/64 scope global nodad deprecated
valid_lft forever preferred_lft 0sec
inet6 fd75:2923:1516:67d1:0:ff:fe00:800/64 scope global nodad
valid_lft forever preferred_lft forever
inet6 fd75:2923:1516:67d1:3dae:936:17f8:c561/64 scope global nodad
valid_lft forever preferred_lft forever
inet6 fe80::4886:c456:2283:cae4/64 scope link nodad
valid_lft forever preferred_lft forever
6: nat64: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 500
link/none
inet6 fe80::1cfd:421b:da60:6b14/64 scope link stable-privacy
valid_lft forever preferred_lft forever
How can I find the source of this issue?
Thank you for your time.
