Should be similar on other switch types.
- Retrieve current settings about tagged/untagged VLAN
- Modify VLAN settings
- Write it back
- Save switch state
Be sure not to cut yourself from switch management 🙂
You should have SNMP enabled and configured on switch (user with permission to read and write). We are using there two functions to decompose and compose HEX-STRING readed from switch. Also SNMP PHP package need to be compiled and enabled.
Full example, we are removing port 10 from VLAN1 and adding port 9 tagged:
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<?php // FUNCTIONS /** * Sorry for this ugly thing * @return string */ function fillWithZeroesFromLeftSide($text, $chars) { $string = ""; if(strlen($text) < $chars) { // How many zeroes to add? $needTo = $chars-(strlen($text)); // Make string to glue $text with for($a = 0; $a < $needTo; $a++) { $string .= "0"; } } return $string.$text; } /** * Returns array with ports which are in VLAN * @param $hex "FF 7F FE F0 00 00 00 00" * @return array */ function hexToPortArray($hex) { $p = array(); // "sanitize" $hex = str_replace(" ", "", trim($hex)); // For every char in HEX STRING, do decomposition for($level = 0; $level < strlen($hex); $level++) { // Take char $part = substr($hex, $level, 1); // Leading "B" is there to have right offset starting with 1 $binary = "B".fillWithZeroesFromLeftSide((string)base_convert($part, 16, 2), 4); // Decompose for($a = 1; $a <= 4; $a++) { $value = substr($binary, $a, 1); if($value == "1") { $p[($level*4)+$a] = 1; } else { $p[($level*4)+$a] = 0; } } } return $p; } /** * Returns back HEX STRING with ports * @param $pole Array * @return string */ function portArrayToHex($array) { $o = ""; // Take element from array for($i = 1; $i <= count($array); $i++) { // Convert it to HEX it with 3 elements that follows $o .= base_convert($array[$i].$array[$i+1].$array[$i+2].$array[$i+3], 2, 16); // Skip those 3 elements $i = $i + 3; } return strtoupper($o); } // EXAMPLE // Connect to switch $snmp = new \snmp(SNMP::VERSION_2C, $IP, "private", "200000" , 1); // We dont need SNMP type hint in returned value snmp_set_valueretrieval(SNMP_VALUE_PLAIN); // VLAN number is the last part of OID $VLAN1taggedOID = ".1.3.6.1.4.1.171.10.76.20.1.7.6.1.2.1"; $VLAN1untaggedOID = ".1.3.6.1.4.1.171.10.76.20.1.7.6.1.4.1"; // Retrieve and make an array with ports from returned value $VLAN1tagged = hexToPortArray($snmp->get($VLAN1taggedOID)); $VLAN1untagged = hexToPortArray($snmp->get($VLAN1untaggedOID)); // We got array, where key is port number and value is if VLAN is present // (1) or not (0) in (un)tagged state // Now, we want port 10 removed from VLANs and port 9 to have tagged. // To be sure, we remove both ports from (un)tagged VLANS and // just add port 9 to tagged VLAN $VLAN1tagged[9] = 0; $VLAN1tagged[10] = 0; $snmp->set($VLAN1taggedOID, "x", portArrayToHex($VLAN1tagged)); $VLAN1untagged[9] = 0; $VLAN1untagged[10] = 0; $snmp->set($VLAN1untaggedOID, "x", portArrayToHex($VLAN1untagged)); // Adding port 9 tagged $VLAN1tagged[9] = 1; $snmp->set($VLAN1taggedOID, "x", portArrayToHex($VLAN1tagged)); // Save configuration var_dump($snmp->set(".1.3.6.1.4.1.171.10.76.20.1.1.10.0", "i", "1")); |
