Bridge SNMP 2 sensor

The Bridge SNMP 2 sensor expands and updates the port data that is discovered by the SNMP MIB2 sensor for all virtual local area networks (VLANs).

The Bridge SNMP 2 sensor is invoked when VLANs are configured for the device. The Cisco VLAN sensor invokes the Bridge SNMP 2 sensor for each VLAN that is discovered. The data that is discovered is the same as for the Bridge SNMP sensor, but it is discovered for all VLANs.

Sensor name that is used in the GUI and logs

BridgeSnmpSensor2

Object identifiers (OIDs) that are used

The sensor follows the standards documented in RFC 1286 to get some of the MAC Forwarding Database (fdb) table entries. The following OIDs are queried:

  • .1.3.6.1.2.1.17.4.3.1.1
  • .1.3.6.1.2.1.17.4.3.1.2.

OID .1.3.6.1.2.1.17.4.3.1.1 returns a list of OIDs for known MAC addresses. These OIDs are then queried to retrieve the interface through which the MAC device can be accessed.

Model objects created

The sensor creates the following model objects:

  • net.L2Interface
  • net.Segment
  • sys.ComputerSystem