/tool netwatch
add down-script="/int pppoe-client set pppoe-out10 disabled=yes
\n:delay 3s\r\
\n/int pppoe-client set pppoe-out10 disabled=no\r\
\n" host=192.168.88.10
/ip dhcp-server lease get [find mac-address=00:01:02:03:04:05] address