ipv6_compare()

Compares two IPv6 or IPv4 network address strings. The two IPv6 strings are parsed and compared while accounting for the combined IP-prefix mask calculated from argument prefixes, and the optional prefix argument.

Syntax

ipv6_compare(ip1,ip2[ ,prefix])

Parameters

Returns

• 0: If the long representation of the first IPv6 string argument is equal to the second IPv6 string argument.
• 1: If the long representation of the first IPv6 string argument is greater than the second IPv6 string argument.
• -1: If the long representation of the first IPv6 string argument is less than the second IPv6 string argument.
• null: If conversion for one of the two IPv6 strings wasn’t successful.

Examples: IPv6/IPv4 comparison equality cases

Compare IPs using the IP-prefix notation specified inside the IPv6/IPv4 strings

datatable(ip1_string:string, ip2_string:string)
[
 // IPv4 are compared as IPv6 addresses
 '192.168.1.1',    '192.168.1.1',       // Equal IPs
 '192.168.1.1/24', '192.168.1.255',     // 24 bit IP4-prefix is used for comparison
 '192.168.1.1',    '192.168.1.255/24',  // 24 bit IP4-prefix is used for comparison
 '192.168.1.1/30', '192.168.1.255/24',  // 24 bit IP4-prefix is used for comparison
  // IPv6 cases
 'fe80::85d:e82c:9446:7994', 'fe80::85d:e82c:9446:7994',         // Equal IPs
 'fe80::85d:e82c:9446:7994/120', 'fe80::85d:e82c:9446:7998',     // 120 bit IP6-prefix is used for comparison
 'fe80::85d:e82c:9446:7994', 'fe80::85d:e82c:9446:7998/120',     // 120 bit IP6-prefix is used for comparison
 'fe80::85d:e82c:9446:7994/120', 'fe80::85d:e82c:9446:7998/120', // 120 bit IP6-prefix is used for comparison
 // Mixed case of IPv4 and IPv6
 '192.168.1.1',      '::ffff:c0a8:0101', // Equal IPs
 '192.168.1.1/24',   '::ffff:c0a8:01ff', // 24 bit IP-prefix is used for comparison
 '::ffff:c0a8:0101', '192.168.1.255/24', // 24 bit IP-prefix is used for comparison
 '::192.168.1.1/30', '192.168.1.255/24', // 24 bit IP-prefix is used for comparison
]
| extend result = ipv6_compare(ip1_string, ip2_string)

Output

Compare IPs using IP-prefix notation specified inside the IPv6/IPv4 strings and as additional argument of the ipv6_compare() function

datatable(ip1_string:string, ip2_string:string, prefix:long)
[
 // IPv4 are compared as IPv6 addresses 
 '192.168.1.1',    '192.168.1.0',   31, // 31 bit IP4-prefix is used for comparison
 '192.168.1.1/24', '192.168.1.255', 31, // 24 bit IP4-prefix is used for comparison
 '192.168.1.1',    '192.168.1.255', 24, // 24 bit IP4-prefix is used for comparison
   // IPv6 cases
 'fe80::85d:e82c:9446:7994', 'fe80::85d:e82c:9446:7995',     127, // 127 bit IP6-prefix is used for comparison
 'fe80::85d:e82c:9446:7994/127', 'fe80::85d:e82c:9446:7998', 120, // 120 bit IP6-prefix is used for comparison
 'fe80::85d:e82c:9446:7994/120', 'fe80::85d:e82c:9446:7998', 127, // 120 bit IP6-prefix is used for comparison
 // Mixed case of IPv4 and IPv6
 '192.168.1.1/24',   '::ffff:c0a8:01ff', 127, // 127 bit IP6-prefix is used for comparison
 '::ffff:c0a8:0101', '192.168.1.255',    120, // 120 bit IP6-prefix is used for comparison
 '::192.168.1.1/30', '192.168.1.255/24', 127, // 120 bit IP6-prefix is used for comparison
]
| extend result = ipv6_compare(ip1_string, ip2_string, prefix)

Output

Related content

• Overview of IPv4/IPv6 functions