The op-mode script simply calls sudo systemctl restart "dhclient@$4.service"
Which consists out of:
[email protected]:~$ systemctl cat [email protected] # /lib/systemd/system/[email protected] [Unit] Description=DHCP client on %i Documentation=man:dhclient(8) StartLimitIntervalSec=0 After=vyos-router.service [Service] Type=exec ExecStart=/sbin/dhclient -4 -d $DHCLIENT_OPTS ExecStop=/sbin/dhclient -4 -r $DHCLIENT_OPTS Restart=always RestartPreventExitStatus= RestartSec=10 RuntimeDirectoryPreserve=yes TimeoutStopSec=20 SendSIGKILL=true FinalKillSignal=SIGABRT [Install] WantedBy=multi-user.target
With no additional information about a client interface at all.
This results in useless dhclient processes
root 47812 4.7 0.0 5848 3584 ? Ss 00:30 0:00 /sbin/dhclient -4 -d root 48121 0.0 0.0 4188 3072 ? S 00:30 0:00 \_ /bin/sh /sbin/dhclient-script root 48148 50.0 0.2 18776 11264 ? R 00:30 0:00 \_ python3 -
Which also assign client leases to all local interfaces, if we receive one valid DHCPOFFER
[email protected]:~$ show interfaces Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down Interface IP Address MAC VRF MTU S/L Description ----------- ----------------- ----------------- ------- ----- ----- ------------- dum0 172.18.254.201/32 1e:7f:da:51:a0:a2 default 1500 u/u eth0 - 00:50:56:bf:c5:6d default 1500 u/u eth0.10 172.16.33.201/24 00:50:56:bf:c5:6d default 1500 u/u 172.16.33.102/24 eth0.201 172.18.201.10/24 00:50:56:bf:c5:6d default 1500 u/u eth1 172.16.33.131/24 00:50:56:b3:38:c5 default 1500 u/u
172.16.33.102/24 and 172.16.33.131/24 are stray DHCP addresses