regexstringnumbersrangevlan

Regex to accept numbers and/or number range separated by commas, but between range 1-4093

I need a regex to validate VLAN string entered by user. The string should allow numbers or ranges, separated by comma. The numbers must be between 1 and 4093.

Below samples are allowed:

1,
1,2,3,4
1-10, 
1-4093
4000

I tried below : 

^0*([1-9]|[1-8][0-9]|9[0-9]|[1-8][0-9]{2}|9[0-8][0-9]|99[0-9]|[1-3][0-9]{3}|40[0-8][0-9]|409[0-3])$

Need to enhance for comma separated and ranges

Solution

  • To match a number from 1 to 4093 one can use:

    (?:[1-9]\d{0,2}|[1-3]\d{3}|40(?:[0-8]\d|9[0-3]))

    That we'll call N. Now the repetition part:

    ^(N)(?:[,-] *(N)?)*$

    which gives:

    ^(?:[1-9]\d{0,2}|[1-3]\d{3}|40(?:[0-8]\d|9[0-3]))(?:[,-] *(?:[1-9]\d{0,2}|[1-3]\d{3}|40(?:[0-8]\d|9[0-3]))?)*$

    Live demo