VyOS 1.2 (crux)
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.
VyOS 1.3 (equuleus/current)
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