vpp unix '{' nodaemon cli-listen /run/vpp/cli.sock '}' dpdk '{' no-pci '}' session '{' evt_qs_memfd_seg '}' socksvr '{' socket-name /run/vpp-api.sock '}' plugins '{' plugin default '{' disable '}' plugin dpdk_plugin.so '{' enable '}' '}'

[root@GrizzlyPass14 spdk]# vppctl show version; echo $?
vpp v19.04.2-release built by sys_sgci on GrizzlyPass14 at Mon 09 Mar 2020 03:45:41 PM CET
0

[root@GrizzlyPass14 spdk]# vppctl show; echo $?
show: unknown input `'
0
[root@GrizzlyPass14 spdk]# vppctl shOOOw; echo $?
unknown input `shOOOw'
0


[root@GrizzlyPass14 spdk]# vppctl show interface
              Name               Idx    State  MTU (L3/IP4/IP6/MPLS)     Counter          Count
host-spdk_tgt_int                 1      up          1460/0/0/0     rx packets                    10
                                                                    rx bytes                     700
                                                                    drops                         10
                                                                    ip6                           10
local0                            0     down          0/0/0/0

[root@GrizzlyPass14 spdk]# vppctl show interface XXXX; echo $?
show interface: unknown input `XXXX'
0
[root@GrizzlyPass14 spdk]# vppctl set interface mtu 1500 host-spdk_TGT_int; echo $?
set interface mtu: unknown input `1500 host-spdk_TGT_int'
0
[root@GrizzlyPass14 spdk]# vppctl set interface mtu 10 host-spdk_tgt_int; echo $?
set interface mtu: Invalid mtu (10): must be >= min pkt bytes (64)
0
[root@GrizzlyPass14 spdk]# vppctl set interface state host-spdk_tgt_int up; echo $?
0
[root@GrizzlyPass14 spdk]# vppctl set interface state host-spdk_tgt_int SomeState; echo $?
set interface state: unknown flags `SomeState'
0