In the [[ https://github.com/vyos/vyos-replace/blob/e4a2eda8121a3a88b40868996577cde53a34ba0c/files/dhclient-script | `/sbin/dhclient-script` ]] is still exist `$new_interface_mtu` part which trying to run:
```
/opt/vyatta/sbin/vyatta-interfaces.pl --dev=$interface --path
```
But, this was removed [[ https://github.com/vyos/vyatta-cfg-system/commit/5ce44056a14f7b2e682da72229d43d0c0a3039da#diff-34677ffccbad8f3b8ff34e3b5ed56a62 | long time ago ]].
The same situation about `vyatta_update_resolv.pl`, [[ https://github.com/vyos/vyos-replace/blob/e4a2eda8121a3a88b40868996577cde53a34ba0c/files/dhclient-script#L42 | link to which ]] still exist in `dhclient-script`, but the script was [[ https://github.com/vyos/vyatta-cfg-system/commit/e171516225bad627b70aed808868396d9264a707#diff-02f0b547c2779d25cff89672135f20e3 | removed ]].
We need to remove this rudiments from the `dhclient-script` too.