Hi, I am not sure if this is specific to cumulus or FRR in general, It seems the route-target config for evpn (maybe for other family too) has some magic if the 2 byte number has more than 3 digit. I am adding a new vni 12345 with RT 64000:12345. The RT simply disappear r1(config-router-af)# vni 12345 r1(config-router-af-vni)# rd 172.16.10.10:12345 r1(config-router-af-vni)# route-target both 64000:12345 r1(config-router-af-vni)# r1(config-router-af-vni)# do sh run Building configuration... ... router bgp 64000 address-family l2vpn evpn neighbor 10.7.0.3 activate neighbor 10.7.0.22 activate * vni 12345* * rd 172.16.10.10:12345 <http://172.16.10.10:12345>* * exit-vni* vni 31100 rd 172.16.20.20:31100 route-target import 64000:31100 route-target export 64000:31100 exit-vni ... now i add "shorter" RT before putting the intended RT, both RT shows up r1(config-router-af-vni)# route-target both 64000:12 r1(config-router-af-vni)# route-target both 64000:12345 r1(config-router-af-vni)# do sh run ... vni 12345 rd 172.16.10.10:12345 * route-target import 64000:12* * route-target import 64000:12345* * route-target export 64000:12* * route-target export 64000:12345* exit-vni ... and if i delete the dummy RT, the intended RT still there r1(config-router-af-vni)# no route-target export 64000:12 r1(config-router-af-vni)# no route-target import 64000:12 r1(config-router-af-vni)# r1(config-router-af-vni)# do sh run ... vni 12345 rd 172.16.10.10:12345 route-target import 64000:12345 route-target export 64000:12345 exit-vni .... could someone please take a look? note: cumulus version is 3.5.3, FRR version is 3.2+cl3u4 thanks. rendo