SNMP

SNMP

How do I get to this page?

This page opens when you navigate to Settings and click SNMP.

What’s on this page?

You can use Simple Network Management Protocol (SNMP) in network management systems (NMSs) to monitor the Rocket. In this environment an SNMP manager (for example, an NMS device) sends requests to an SNMP agent (the Rocket). You can use an SNMP browser to browse the tree and pick the available MIBs or use the built-in monitoring utilities from your NMS. This lets you monitor the Rocket and other network devices (for examples, switches, routers, and printers) from the same workstation.

Configurable Fields on this Page

  • SNMPv1/SNMPv2c read-only access community name – This read-only field displays the community name that the SNMP manager must use to communicate with the Rocket (the SNMP agent).
  • Community access restriction – Enter an IP address, IP address range, or valid (in other words, resolvable) hostname that will allow access to the SNMP agent on the Rocket. If the hostname or network address/CIDR range is not valid, the community will not report.

Note: In large environments where many SNMP pollers are used then setting the Community access restriction field to an empty value allows many SNMP pollers.

Supported MIBS

The table below lists MIBs that are currently supported on the Rocket appliance. Click the MIB name for more information.

MIB Description
SNMPv2-MIB The MIB module for SNMP entities.
DISMAN-EVENT-MIB The MIB module for defining event triggers and actions for network management purposes.
IF-MIB The MIB module to describe generic objects for network interface sublayers.
SNMPv2-SMI The Structure Management Information (SMI) document consisting of module, object, and notification definitions.
IP-MIB The MIB for the Internet Protocol (IP).
TCP-MIB The Transmission Control Protocol (TCP) MIB.
IPV6-TCP-MIB The MIB for implementing TCP over IPv6.
UDP-MIB The MIB for User Datagram Protocol (UDP).
IPV6-UDP-MIB The MIB for UDP over IPv6.
HOST-RESOURCES-MIB The MIB for managing host systems.
UCD-SNMP-MIB The MIB for extensions originally developed by the University of California, Davis.
MTA-MIB The MIB for Message Transfer Agents (MTAs).
IPV6-MIB The MIB for Internet Protocol v6 (IPv6).
NOTIFICATION-LOG-MIB The MIB for senders of notifications, which can also be used also by receivers.
SCTP-MIB The MIB for Stream Control Transmission Protocol (SCTP), which was originally developed for transporting Public Switched Telephone Network (PSTN) signaling messages but is now used for many other applications.

Useful SNMP OIDs

The sections below list several MIB Object IDs (OIDs) to display useful statistics about Rocket appliances. In the tables below you can click the table name for more information. In addition, several sections provide sample outputs generated by the open source Net-SNMP suite of application. Click here for more information about Net-SNMP.

prTable

MIB/Table Name Registered OID Summary
UCD-SNMP-MIB::prTable 1.3.6.1.4.1.2021.2 A table containing information on running programs/daemons configured for monitoring in the snmpd.conf file of the agent. Errors flag processes that violate the number of running processes required by the agent’s configuration file.

The Rocket appliance uses certain service-critical processes depending on its configuration. These services are monitored by the SNMP agent and can be reported on using the UCD-SNMP-MIB MIB via the prTable OID.

dsktable

MIB/Table Name Registered OID Summary
UCD-SNMP-MIB::dskTable .1.3.6.1.4.1.2021.9 Disk watching information.

 

laTable

MIB/Table Name Registered OID Summary
UCD-SNMP-MIB::laTable .1.3.6.1.4.1.2021.10 Load average information.

 

fileTable

MIB/Table Name Registered OID Summary
UCD-SNMP-MIB::fileTable .1.3.6.1.4.1.2021.15 Table of monitored files.

 

ifTable

MIB/Table Name Registered OID Summary
IF-MIB::ifTable .1.3.6.1.2.1.2.2 A list of interface entries. The number of entries is given by the value of ifNumber (the number of network interfaces).

 

HOST-RESOURCES-MIB MIB

Another useful MIB is the HOST-RESOURCES-MIB MIB, which is documented as OID .1.3.6.1.2.1.25.

hrStorageTable

MIB/Table Name Registered OID Summary
HOST-RESOURCES-MIB::hrStorageTable .1.3.6.1.2.1.25.2.3 The (conceptual) table of logical storage areas on the host.

 

You can use the hrStorageTable to determine the actual usable amount of storage available. This value excludes the loss due to formatting or file system reference information. This table is particularly useful diagnostic tool for ‘out of memory’ and ‘out of buffers’ errors. In addition, it can be a useful tool for monitoring memory, buffer, and disk performance.

hrDeviceTable

MIB/Table Name Registered OID Summary
HOST-RESOURCES-MIB:: hrDeviceTable .1.3.6.1.2.1.25.3.2 The (conceptual) table of devices contained by the host.

 

You can use the hrDeviceTable table to display device data, including device ID, status, and errors.