/ip route vrf add routing-mark=L2TP interfaces=ether1,l2tp-r3
/ip route print where routing-mark=L2TP
Flags: X - disabled, A - active, D - dynamic,
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,
B - blackhole, U - unreachable, P - prohibit
# DST-ADDRESS PREF-SRC GATEWAY DISTANCE
0 ADC 192.168.50.0/24 192.168.50.120 ether1 0
1 ADC xxx.xxx.xx.x/32 xxx.xxx.xx.x l2tp-r3 0