SAN monitoring: troubleshooting

  • Make sure that is open port 161 UDP to the switch, on the STOR2RRD server run:
    $ perl /home/stor2rrd/stor2rrd/bin/ 161
      UDP connection to "" on port "161" is ok
    However even "ok" result does not have to mean that communication is not blocked by some firewall as firewall can respond to that test
    Make sure with the security department that communication is not blocked, this fixes majority of problems.


  1. Brocade note: SNMPv2 is not supported in FOS v9.0.1a but is not blocked. SNMPv2 will be blocked beginning with FOS v9.1.0.

  2. make sure that stor2rrd host/IP is on the switch access list
    SAN1:admin> snmpconfig --show accessControl
  3. make sure that there are allowed these mibs at least on the switch
    SAN1:admin> snmpconfig --show mibCapability
      FE-MIB: YES
      SW-MIB: YES
      FA-MIB: YES
      HA-MIB: YES
      IF-MIB: YES
      BD-MIB: YES
    Activate missing MIBs like below:
    SAN1:admin> snmpconfig --enable mibCapability -mib_name FICON-MIB
    SAN1:admin> snmpconfig --enable mibCapability -mib_name HA-MIB
    SAN1:admin> snmpconfig --enable mibCapability -mib_name FCIP-MIB
    SAN1:admin> snmpconfig --enable mibCapability -mib_name ISCSI-MIB
    SAN1:admin> snmpconfig --enable mibCapability -mib_name BD-MIB
    make sure it works from stor2rrd server:
    $ /opt/freeware/bin/snmpwalk -v 1 -c <your comunity string> <Switch IP/hostname>
      SNMPv2-SMI::mib- = Hex-STRING: 10 00 00 27 F8 6E 88 CD 
  4. make sure community string is proper for v1 and v2c
    SAN1:admin> snmpconfig --show snmpv1
  5. set SNMP GET security level to 0
    SAN1:admin> snmpconfig --show seclevel
    SAN1:admin> snmpconfig --set seclevel
      Select SNMP GET Security Level
      (0 = No security, 1 = Authentication only, 2 = Authentication and Privacy, 3 = No Access): (0..3) [3] 0
  • SNMP mibCapability is turned off during some FOS upgrade. Most specially FCIP-MIB, enable it after the upgrade:
    SAN1:admin> snmpconfig --enable mibCapability -mib_name FCIP-MIB
  • Note a potential CPU issue on switches when you use vFabric support.

  • In case you find below error during initial configuration then follow this page
    $ cd /home/stor2rrd/stor2rrd/logs
    $ tail -1 err.log-<Switch IP>
      Can't load '/opt/freeware/lib/perl5/vendor_perl/5.8.8/ppc-thread-multi/auto/NetSNMP/default_store/' for module NetSNMP::default_store:
      Could not load module /opt/freeware/lib/libnetsnmp.a(
      Dependent module /usr/lib/libcrypto.a( could not be loaded.
      Member is not found in archive
  • STOR2RRD presents bad health status even if the switch is fine
    # snmpwalk -v 2c -c <your comunity string> <Switch IP/hostname>
    SNMPv2-SMI::experimental. = INTEGER: 5
    It should return "3".
    HPE support adviced to do hareboot and it helped, now it returns "3" what means that it is ok. More information


  • there should not be anything special, we do not register any issues in SNMP configuration on Cisco switches. Just follow up our docu.
    Definitely ask the security department is there is not any firewall blocking the traffic.

    This must go through (change the IP and comunity string if necessary):
    snmpwalk -v 2c -c <your comunity string> <Switch IP/hostname>
    If you go nowhere, contact the switch vendor support

Check our forum or contact us via

Debug data - Brocade

To be able to debug SAN switch connectivity we would need this data:
  1. from the switch:
    SAN1:admin> snmpconfig --show seclevel
    SAN1:admin> snmpconfig --show mibCapability
    SAN1:admin> snmpconfig --show accessControl
  2. IP address of STOR2RRD server
    ifconfig -a
  3. this output:
    snmpwalk -v 2c -c <your comunity string> <Switch IP/hostname>