To reproduce, add gre tunnel
set interfaces tunnel tun0 encapsulation 'gre' set interfaces tunnel tun0 remote '192.0.2.5' set interfaces tunnel tun0 source-address '192.0.2.1'
Check MAC on tun0
>>> from vyos.ifconfig import Interface
>>>
>>> Interface('eth0').get_mac()
'52:54:00:f1:fd:77'
>>>
>>> Interface('tun0').get_mac()
'192.0.2.1'
>>>Expected some n/a value
>>> from vyos.ifconfig import Interface
>>> Interface('tun0').get_mac()
'192.0.2.1'
>>> from vyos.ifconfig import TunnelIf
>>> TunnelIf('tun0').get_mac()
'fb:75:49:15:1e:71'
>>>This more or less works as designed.
Tunnel interfaces per-se do not have a MAC address because they do nto have a "MAC" layer, that's why an artificial MAC can be generated (e.g. for IPv6 EUI64 addressing).
https://github.com/vyos/vyos-1x/blob/current/python/vyos/ifconfig/tunnel.py#L156-L158
@Interface.register
class TunnelIf(Interface):
...
def get_mac(self):
""" Get a synthetic MAC address. """
return self.get_mac_synthetic()