From: invalid@invalid.invalid
druck writes:
> On 30/12/2025 01:00, Jim Diamond wrote:
>> However, it was worth a look. Maybe. According to the router, the
>> "mystery" address is paired with the wifi card's actual ethernet (MAC)
>
> MAC's aren't just Ethernet, WiFi and Bluetooth interfaces also have them.
>
>> address, whereas the "proper" address is (currently) paired with the
>> same ethernet address, except the last octet is 8C instead of 8D.
>> This makes me think that it is showing "Connected" or "Disconnected"
>> according to the ethernet address which is working, and it is not
>> careful about pairing that with the correct IPv4 address.
>
> You often see a difference of 1 when something creates a virtual
> network interface for use by a virtual machine or container. The
> virtual network card is assigned the second IP address and can operate
> independently from anything using the hosts primary interface and IP
> address.
At least on my 3B and 4B, the wired and wireless interfaces have
adjacent MACs.
PS C:\Users\rjk> ssh shairo ip link show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode
DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: mtu 1500 qdisc noop state DOWN mode DEFAULT
group default qlen 1000
link/ether dc:a6:32:cb:73:6b brd ff:ff:ff:ff:ff:ff
3: wlan0: mtu 1500 qdisc fq_codel state
UP mode DORMANT group default qlen 1000
link/ether dc:a6:32:cb:73:6c brd ff:ff:ff:ff:ff:ff
If both interfaces were connected to the same network then I might see
something similar to Jim’s situation.
I did ask Jim for ‘ip addr show’ output but it has not appeared.
--
https://www.greenend.org.uk/rjk/
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