vyos@vyos-for-test:~$ show int
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface    IP Address        MAC                VRF        MTU  S/L    Description
-----------  ----------------  -----------------  -------  -----  -----  -------------
eth0                           00:90:fa:79:ef:92  default   1500  u/u
eth1         -                 00:90:fa:79:ef:96  default   1500  u/D
eth2         -                 00:90:fa:79:ef:9a  default   1500  u/D
eth3         -                 00:90:fa:79:ef:9e  default   1500  u/D
eth4         -                 b8:ce:f6:f2:67:72  default   1500  u/D
eth5         -                 b8:ce:f6:f2:67:73  default   1500  u/D
eth6         192.168.2.1/24    0c:42:a1:2b:74:22  default   9500  u/u
eth7         192.168.3.1/24    0c:42:a1:2b:74:23  default   9500  u/u
lo           127.0.0.1/8       00:00:00:00:00:00  default  65536  u/u
             ::1/128
vyos@vyos-for-test:~$ 
vyos@vyos-for-test:~$ 
vyos@vyos-for-test:~$ ping 192.168.2.2
PING 192.168.2.2 (192.168.2.2) 56(84) bytes of data.
64 bytes from 192.168.2.2: icmp_seq=1 ttl=64 time=0.166 ms
^C
--- 192.168.2.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.166/0.166/0.166/0.000 ms
vyos@vyos-for-test:~$ 
vyos@vyos-for-test:~$ conf
se[edit]
vyos@vyos-for-test# set vpp settings interface eth6 driver dpdk 
[edit]
vyos@vyos-for-test# commit

[ vpp ]
WARNING: ring-buffer option in eth6 settings is not supported by VPP interfaces. It will be ignored.

[edit]
vyos@vyos-for-test# 
[edit]
vyos@vyos-for-test# run ping 192.168.2.2
PING 192.168.2.2 (192.168.2.2) 56(84) bytes of data.
From 192.168.2.1 icmp_seq=1 Destination Host Unreachable
From 192.168.2.1 icmp_seq=2 Destination Host Unreachable
From 192.168.2.1 icmp_seq=3 Destination Host Unreachable
From 192.168.2.1 icmp_seq=4 Destination Host Unreachable
From 192.168.2.1 icmp_seq=5 Destination Host Unreachable
From 192.168.2.1 icmp_seq=6 Destination Host Unreachable

vyos@vyos-for-test:~$ sudo ip addr flush dev defunct_eth6
vyos@vyos-for-test:~$ show ip route 
Codes: K - kernel route, C - connected, L - local, S - static,
       R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
       f - OpenFabric, t - Table-Direct,
       > - selected route, * - FIB route, q - queued, r - rejected, b - backup
       t - trapped, o - offload failure

S>* 16.0.0.0/8 [1/0] via 192.168.2.2, eth6, weight 1, 00:00:02
S>* 48.0.0.0/8 [1/0] via 192.168.3.2, eth7, weight 1, 1d19h44m
C>* 192.168.2.0/24 is directly connected, eth6, weight 1, 00:15:17
L>* 192.168.2.1/32 is directly connected, eth6, weight 1, 00:15:17
C>* 192.168.3.0/24 is directly connected, eth7, weight 1, 1d19h44m
L>* 192.168.3.1/32 is directly connected, eth7, weight 1, 1d19h44m

vyos@vyos-for-test:~$ ping 192.168.2.2
PING 192.168.2.2 (192.168.2.2) 56(84) bytes of data.
64 bytes from 192.168.2.2: icmp_seq=1 ttl=64 time=0.140 ms
64 bytes from 192.168.2.2: icmp_seq=2 ttl=64 time=0.041 ms
64 bytes from 192.168.2.2: icmp_seq=3 ttl=64 time=0.033 ms
^C64 bytes from 192.168.2.2: icmp_seq=4 ttl=64 time=0.038 ms