Bug #70382 [Opn->Fbk]: snmp2_real_walk claims "No response"

Edit report at https://bugs.php.net/bug.php?id=70382&edit=1 ID: 70382 Updated by: lytboris@php.net Reported by: php at t-b-o-h dot net Summary: snmp2_real_walk claims "No response" -Status: Open +Status: Feedback Type: Bug Package: SNMP related Operating System: CentOS 6.3/Windows 7 PHP Version: 5.6.12 Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2016-06-06 07:12:17] lytboris@php.net Well, using snmpwalk for a proof of a failure is not a way to go - use snmpbulkwalk for that or tune your SNMP session (yep, use SNMP class) to query less OIDs in single packet. I suspect that remote box can not handle too long packets effectively or your have some network issue at this point resulting in packet loss. ------------------------------------------------------------------------ [2015-08-28 13:50:42] php at t-b-o-h dot net Description: ------------ We are using an F5 BIGIP load balancer, and trying to monitor it. Running the test script results in "PHP Warning: snmp2_real_walk(): No response from HOSTHERE in /home/tuc/Desktop/snmp2_real_walk.php on line 2" on CentOS and Windows 7, versions 5.3.3 through 5.6.12 . However : [tuc@monitoring-01.sf ~]$ time snmpwalk -v2c -c PASSWORD HOST .1.3.6.1.4.1.3375.2.2.10.2.3.1.1|wc -l 48 real 0m0.104s user 0m0.037s sys 0m0.006s In every case I look a tcpdump returns well before the script bombs. The data returned (48 lines) includes some really long OIDS... : SNMPv2-SMI::enterprises.3375.2.2.10.2.3.1.1.41.47.67.111.109.109.111.110.47.97.100.101.110.103.105.110.101.45.112.114.111.100.116.101.115.116.95.112.117.98.108.105.99.45.105.112.49.56.49.46.56.48 = STRING: "/Common/service1" SNMPv2-SMI::enterprises.3375.2.2.10.2.3.1.1.42.47.67.111.109.109.111.110.47.97.100.101.110.103.105.110.101.45.112.114.111.100.116.101.115.116.95.112.117.98.108.105.99.45.105.112.49.56.49.46.52.52.51 = STRING: "/Common/service2" Test script: --------------- <?php print_r(snmp2_real_walk("HOSTHERE:161", "PASSWORDHERE", ".1.3.6.1.4.1.3375.2.2.10.2.3.1.1")); ?> Expected result: ---------------- 48 line array of OIDs and strings such as above Actual result: -------------- "PHP Warning: snmp2_real_walk(): No response from HOSTHERE in /home/tuc/Desktop/snmp2_real_walk.php on line 2" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70382&edit=1