tdef_vty_test> list
... !timer
  show timer [TNNNN]
... !timer

tdef_vty_test> show timer ?
  [TNNNN]  T-number, optionally preceded by 't' or 'T'.

tdef_vty_test> show timer
T1 = 100 s	Testing a hundred seconds (default: 100 s)
T2 = 100 ms	Testing a hundred milliseconds (default: 100 ms)
T3 = 100 m	Testing a hundred minutes (default: 100 m)
T4 = 100	Testing a hundred potatoes (default: 100)
T2147483647 = 18446744073709551615 m	Very large (default: 18446744073709551615 m)
T-23 = 18446744073709551601 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test> enable
tdef_vty_test# show timer
T1 = 100 s	Testing a hundred seconds (default: 100 s)
T2 = 100 ms	Testing a hundred milliseconds (default: 100 ms)
T3 = 100 m	Testing a hundred minutes (default: 100 m)
T4 = 100	Testing a hundred potatoes (default: 100)
T2147483647 = 18446744073709551615 m	Very large (default: 18446744073709551615 m)
T-23 = 18446744073709551601 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test# configure terminal
tdef_vty_test(config)# show running-config
... !timer

tdef_vty_test(config)# network

tdef_vty_test(config-net)# do show timer
T1 = 100 s	Testing a hundred seconds (default: 100 s)
T2 = 100 ms	Testing a hundred milliseconds (default: 100 ms)
T3 = 100 m	Testing a hundred minutes (default: 100 m)
T4 = 100	Testing a hundred potatoes (default: 100)
T2147483647 = 18446744073709551615 m	Very large (default: 18446744073709551615 m)
T-23 = 18446744073709551601 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test(config-net)# do show timer T3
T3 = 100 m	Testing a hundred minutes (default: 100 m)
tdef_vty_test(config-net)# do show timer 3
T3 = 100 m	Testing a hundred minutes (default: 100 m)
tdef_vty_test(config-net)# do show timer t3
T3 = 100 m	Testing a hundred minutes (default: 100 m)

tdef_vty_test(config-net)# timer T1 5
tdef_vty_test(config-net)# timer T1
T1 = 5 s	Testing a hundred seconds (default: 100 s)

tdef_vty_test(config-net)# timer t1 678
tdef_vty_test(config-net)# timer T1
T1 = 678 s	Testing a hundred seconds (default: 100 s)

tdef_vty_test(config-net)# timer 1 9012345
tdef_vty_test(config-net)# timer T1
T1 = 9012345 s	Testing a hundred seconds (default: 100 s)

tdef_vty_test(config-net)# do show timer T666
% No such timer: T666
tdef_vty_test(config-net)# do show timer t666
% No such timer: T666
tdef_vty_test(config-net)# do show timer 666
% No such timer: T666

tdef_vty_test(config-net)# timer T666
% No such timer: T666
tdef_vty_test(config-net)# timer t666
% No such timer: T666
tdef_vty_test(config-net)# timer 666
% No such timer: T666

tdef_vty_test(config-net)# timer T666 5
% No such timer: T666

tdef_vty_test(config-net)# timer T-23 42
tdef_vty_test(config-net)# timer T-23
T-23 = 42 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test(config-net)# timer t-23 43
tdef_vty_test(config-net)# timer T-23
T-23 = 43 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test(config-net)# timer -23 44
tdef_vty_test(config-net)# timer T-23
T-23 = 44 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test(config-net)# do show timer
T1 = 9012345 s	Testing a hundred seconds (default: 100 s)
T2 = 100 ms	Testing a hundred milliseconds (default: 100 ms)
T3 = 100 m	Testing a hundred minutes (default: 100 m)
T4 = 100	Testing a hundred potatoes (default: 100)
T2147483647 = 18446744073709551615 m	Very large (default: 18446744073709551615 m)
T-23 = 44 s	Negative T number (default: 18446744073709551601 s)

tdef_vty_test(config-net)# show running-config
... !timer
net
 timer T1 9012345
 timer T-23 44
... !timer

tdef_vty_test(config-net)# timer T1 default
tdef_vty_test(config-net)# timer T-23 default

tdef_vty_test(config-net)# show running-config
... !timer