Note: On VyOS 1.2 (crux) MTU and IPv6 address is not configured in one-shot mode leading to a weird configuration where the IPv6 address is present on the CLI but not on the interface and the MTU will win.
```
ethernet eth1 {
duplex auto
hw-id 00:50:56:bf:ef:aa
+ mtu 1279
smp-affinity auto
speed auto
}
```
Using an MTU less then the required 1280 bytes on an interface where IPv6 is not explicitly disabled by
- `set interfaces ethernet eth1 ipv6 address no-default-link-local`
- not having any other IPv6 address configured
Will trigger the error
```
vyos@vyos# commit
[ interfaces ethernet eth1 ]
VyOS had an issue completing a command.
We are sorry that you encountered a problem while using VyOS.
There are a few things you can do to help us (and yourself):
- Make sure you are running the latest version of the code available at
https://downloads.vyos.io/rolling/current/amd64/vyos-rolling-latest.iso
- Consult the forum to see how to handle this issue
https://forum.vyos.io
- Join our community on slack where our users exchange help and advice
https://vyos.slack.com
When reporting problems, please include as much information as possible:
- do not obfuscate any data (feel free to contact us privately if your
business policy requires it)
- and include all the information presented below
Report Time: 2020-09-26 11:29:48
Image Version: VyOS 1.3-rolling-202009201335
Release Train: equuleus
Built by:
[email protected]
Built on: Sun 20 Sep 2020 13:35 UTC
Build UUID: 187fd1d5-d402-42f0-b751-404d695196a7
Build Commit ID: d571b383797719
Architecture: x86_64
Boot via: installed image
System type: VMware guest
Hardware vendor: VMware, Inc.
Hardware model: VMware Virtual Platform
Hardware S/N: VMware-42 3f 67 73 77 df c4 80-42 c9 42 af ff 15 de 0b
Hardware UUID: 73673f42-df77-80c4-42c9-42afff15de0b
Traceback (most recent call last):
File "/usr/libexec/vyos/conf_mode/interfaces-ethernet.py", line 91, in <module>
apply(c)
File "/usr/libexec/vyos/conf_mode/interfaces-ethernet.py", line 83, in apply
e.update(ethernet)
File "/usr/lib/python3/dist-packages/vyos/ifconfig/ethernet.py", line 278, in update
super().update(config)
File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py", line 1025, in update
self.add_ipv6_eui64_address('fe80::/64')
File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py", line 500, in add_ipv6_eui64_address
self.add_addr(f'{eui64}/{prefixlen}')
File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py", line 738, in add_addr
self._cmd(f'ip addr add "{addr}" '
File "/usr/lib/python3/dist-packages/vyos/ifconfig/control.py", line 51, in _cmd
return cmd(command, self.debug)
File "/usr/lib/python3/dist-packages/vyos/util.py", line 179, in cmd
raise OSError(code, feedback)
FileNotFoundError: [Errno 2] failed to run command: ip addr add "fe80::250:56ff:febf:efaa/64" dev "eth1"
returned:
exit code: 2
noteworthy:
cmd 'ip addr add "fe80::250:56ff:febf:efaa/64" dev "eth1"'
returned (out):
returned (err):
RTNETLINK answers: No buffer space available
[[interfaces ethernet eth1]] failed
Commit failed
```