If we try to add this interface, we'll get an error
```
set interfaces bonding bond250 vif-s 1000 vif-c 1234
commit
```
commit:
```
Traceback (most recent call last):
File "/usr/libexec/vyos/conf_mode/interfaces_bonding.py", line 289, in <module>
apply(c)
File "/usr/libexec/vyos/conf_mode/interfaces_bonding.py", line 262, in apply
b.update(bond)
File "/usr/lib/python3/dist-packages/vyos/ifconfig/bond.py", line 476, in update
super().update(config)
File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py", line 1762, in update
c_vlan = VLANIf(vif_c_ifname, **tmp)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py", line 339, in __init__
self._create()
File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py", line 1847, in _create
self._cmd(cmd.format(**self.config))
File "/usr/lib/python3/dist-packages/vyos/ifconfig/control.py", line 64, in _cmd
return cmd(command, self.debug)
^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/vyos/utils/process.py", line 155, in cmd
raise OSError(code, feedback)
OSError: [Errno 255] failed to run command: ip link add link bond250.1000 name bond250.1000.1234 type vlan id 1234
returned:
exit code: 255
noteworthy:
cmd 'nft --check delete element inet vrf_zones ct_iface_map { "bond250" }'
returned (out):
returned (err):
Error: Could not process rule: No such file or directory
delete element inet vrf_zones ct_iface_map { bond250 }
^^^^^^^
cmd 'nft --check delete element inet vrf_zones ct_iface_map { "bond250.1000" }'
returned (out):
returned (err):
Error: Could not process rule: No such file or directory
delete element inet vrf_zones ct_iface_map { bond250.1000 }
^^^^^^^^^^^^
cmd 'ip link show dev bond250.1000.1234'
returned (out):
returned (err):
Device "bond250.1000.1234" does not exist.
cmd 'ip link show dev bond250.1000.1234'
returned (out):
returned (err):
Device "bond250.1000.1234" does not exist.
cmd 'ip link add link bond250.1000 name bond250.1000.1234 type vlan id 1234'
returned (out):
returned (err):
Error: argument "bond250.1000.1234" is wrong: "name" not a valid ifname
[[interfaces bonding bond250]] failed
Commit failed
[edit]
vyos@r4#
```
https://manpages.debian.org/bookworm/udev/systemd.link.5.en.html
```
Interface names must have a minimum length of 1 character and a maximum length of 15 characters
```