test# echo this is a  test message
this is a test message
test# echo  foo bla  
% There is no matched command.
test# echo  foo bla    baz
foo bla baz
test# echo
% Command incomplete.
test# 
test# arg ipv4 1.2.3.4
cmd0 with 3 args.
[00]: arg
[01]: ipv4
[02]: 1.2.3.4
test# arg ipv4 1.2.
  A.B.C.D  02
test# arg ipv4 1.2.3.4
cmd0 with 3 args.
[00]: arg
[01]: ipv4
[02]: 1.2.3.4
test# arg ipv4 1.2.3
% [NONE] Unknown command: arg ipv4 1.2.3
test# arg ipv4 1.2.3.4.5
% [NONE] Unknown command: arg ipv4 1.2.3.4.5
test# arg ipv4 1.a.3.4
% [NONE] Unknown command: arg ipv4 1.a.3.4
test# arg ipv4 blah
% [NONE] Unknown command: arg ipv4 blah
test# 
test# arg ipv4m 1.2.3.0/24
cmd1 with 3 args.
[00]: arg
[01]: ipv4m
[02]: 1.2.3.0/24
test# arg ipv4m 1.2.
  A.B.C.D/M  02
test# arg ipv4m 1.2.3.0/24
cmd1 with 3 args.
[00]: arg
[01]: ipv4m
[02]: 1.2.3.0/24
test# arg ipv4m 1.2.3/9
% [NONE] Unknown command: arg ipv4m 1.2.3/9
test# arg ipv4m 1.2.3.4.5/6
% [NONE] Unknown command: arg ipv4m 1.2.3.4.5/6
test# arg ipv4m 1.a.3.4
% [NONE] Unknown command: arg ipv4m 1.a.3.4
test# arg ipv4m blah
% [NONE] Unknown command: arg ipv4m blah
test# arg ipv4m 1.2.3.0/999
% [NONE] Unknown command: arg ipv4m 1.2.3.0/999
test# arg ipv4m 1.2.3.0/a9
% [NONE] Unknown command: arg ipv4m 1.2.3.0/a9
test# arg ipv4m 1.2.3.0/9a
% [NONE] Unknown command: arg ipv4m 1.2.3.0/9a
test# 
test# arg ipv6 de4d:b33f::cafe
cmd2 with 3 args.
[00]: arg
[01]: ipv6
[02]: de4d:b33f::cafe
test# arg ipv6 de4d:b3
% There is no matched command.
test# arg ipv6 de4d:b33f::caf
  X:X::X:X  02
test# arg ipv6 de4d:b33f::cafe
cmd2 with 3 args.
[00]: arg
[01]: ipv6
[02]: de4d:b33f::cafe
test# arg ipv6 de4d:b3
test# arg ipv6 de4d:b33f::caf
  X:X::X:X  02
test# arg ipv6 de4d:b33f::cafe
cmd2 with 3 args.
[00]: arg
[01]: ipv6
[02]: de4d:b33f::cafe
test# arg ipv6 de4d:b33f:z::cafe
% [NONE] Unknown command: arg ipv6 de4d:b33f:z::cafe
test# arg ipv6 de4d:b33f:cafe:
% [NONE] Unknown command: arg ipv6 de4d:b33f:cafe:
test# arg ipv6 ::
cmd2 with 3 args.
[00]: arg
[01]: ipv6
[02]: ::
test# arg ipv6 ::/
% [NONE] Unknown command: arg ipv6 ::/
test# arg ipv6 1:2:3:4:5:6:7:8:9:0:1:2:3:4:5:6:7:8:9:0:1:2:3:4:5:6:7:8:9:0
% [NONE] Unknown command: arg ipv6 1:2:3:4:5:6:7:8:9:0:1:2:3:4:5:6:7:8:9:0:1:2:3:4:5:6:7:8:9:0
test# arg ipv6 12::34::56
% [NONE] Unknown command: arg ipv6 12::34::56
test# arg ipv6m dead:beef:cafe::/64
cmd3 with 3 args.
[00]: arg
[01]: ipv6m
[02]: dead:beef:cafe::/64
test# arg ipv6m dead:be
  X:X::X:X/M  02
test# arg ipv6m dead:beef:cafe:
  X:X::X:X/M  02
test# arg ipv6m dead:beef:cafe::/64
cmd3 with 3 args.
[00]: arg
[01]: ipv6m
[02]: dead:beef:cafe::/64
test# 
test# arg range 4
% [NONE] Unknown command: arg range 4
test# arg range 5
cmd4 with 3 args.
[00]: arg
[01]: range
[02]: 5
test# arg range 9
  (5-15)  02
test# arg range 9
cmd4 with 3 args.
[00]: arg
[01]: range
[02]: 9
test# arg range 15
cmd4 with 3 args.
[00]: arg
[01]: range
[02]: 15
test# arg range 16
% [NONE] Unknown command: arg range 16
test# arg range -1
% [NONE] Unknown command: arg range -1
test# arg range 99999999999999999999999999999999999999999
% [NONE] Unknown command: arg range 99999999999999999999999999999999999999999
test# 
test# arg 
  ipv4   01
  ipv4m  01
  ipv6   01
  ipv6m  01
  range  01
test# arg 
% Command incomplete.
test# 
test# pa
test# papat 
% Command incomplete.
test# pat 
a          c          d          e          f          
test# pat 
% Command incomplete.
test# 
test# pat a
% Command incomplete.
test# pat a a
cmd5 with 3 args.
[00]: pat
[01]: a
[02]: a
test# pat a 
  a  02
  b  03
test# pat a b
cmd5 with 3 args.
[00]: pat
[01]: a
[02]: b
test# pat a c
% There is no matched command.
test# pat a c
% [NONE] Unknown command: pat a c
test# pat a a x
% [NONE] Unknown command: pat a a x
test# 
test# pat c a
% Command incomplete.
test# pat c a 1.2.3.4
cmd7 with 4 args.
[00]: pat
[01]: c
[02]: a
[03]: 1.2.3.4
test# pat c b 2.3.4
% [NONE] Unknown command: pat c b 2.3.4
test# pat c c 
  A.B.C.D  05
test# pat c c x
% [NONE] Unknown command: pat c c x
test# 
test# pat d
% Command incomplete.
test# pat d 
bar        baz        foo        
test# pat d 
% Command incomplete.
test# pat d foo 1.2.3.4
cmd8 with 4 args.
[00]: pat
[01]: d
[02]: foo
[03]: 1.2.3.4
test# pat d foo
% Command incomplete.
test# pat d noooo
% [NONE] Unknown command: pat d noooo
test# pat d bar 1::2
cmd8 with 4 args.
[00]: pat
[01]: d
[02]: bar
[03]: 1::2
test# pat d bar 1::2 foo 3.4.5.6
cmd8 with 6 args.
[00]: pat
[01]: d
[02]: bar
[03]: 1::2
[04]: foo
[05]: 3.4.5.6
test# pat d ba
  bar  04
  baz  06
test# pat d baz
cmd8 with 3 args.
[00]: pat
[01]: d
[02]: baz
test# pat d foo 3.4.5.6 baz
cmd8 with 5 args.
[00]: pat
[01]: d
[02]: foo
[03]: 3.4.5.6
[04]: baz
test# 
test# pat e
cmd9 with 2 args.
[00]: pat
[01]: e
test# pat e f
cmd9 with 3 args.
[00]: pat
[01]: e
[02]: f
test# pat e f g
% [NONE] Unknown command: pat e f g
test# pat e 1.2.3.4
cmd9 with 3 args.
[00]: pat
[01]: e
[02]: 1.2.3.4
test# 
test# pat f
cmd10 with 2 args.
[00]: pat
[01]: f
test# pat f foo
% [NONE] Unknown command: pat f foo
test# pat f key
cmd10 with 3 args.
[00]: pat
[01]: f
[02]: key
test# 
test# alt a 
test# alt a a
  WORD  02
test# alt a ab
cmd11 with 3 args.
[00]: alt
[01]: a
[02]: ab
test# alt a 1
test# alt a 1.2
  A.B.C.D  02
  WORD     02
test# alt a 1.2.3.4
cmd12 with 3 args.
[00]: alt
[01]: a
[02]: 1.2.3.4
test# alt a 1
test# alt a 1:2
  WORD  02
test# alt a 1:2
test# alt a 1:2::
  WORD      02
  X:X::X:X  02
test# alt a 1:2::3
cmd13 with 3 args.
[00]: alt
[01]: a
[02]: 1:2::3
test# 
test# conf t
test(config)# do pat d baz
cmd8 with 3 args.
[00]: pat
[01]: d
[02]: baz
test(config)# exit
test# 
test# show run

Current configuration:
!
hostname test
!
!
line vty
!
end
test# conf t
test(config)# hostname foohost
foohost(config)# do show run

Current configuration:
!
hostname foohost
!
!
line vty
!
end
foohost(config)# 
end.