Technical data

1-2 Fabric OS MIB Reference Manual
Publication Number: 53-0000521-08
Understanding SNMP Basics
1
When passive, the management station receives an unsolicited message (trap) from the switch agent if
an unusual event occurs. Refer to Traps on page 1-4 for more information.
Figure 1-3 SNMP Trap
The agent can receive queries from one or more management stations and can send traps to up to six
management stations.
Figure 1-4 Fibre Channel SAN
Understanding MIBs
The MIB structure can be represented by a tree hierarchy. The root splits into three main branches:
International Organization for Standardization (ISO), Consultative Committee for International
Telegraph and Telephone (CCITT), and joint ISO/CCITT. These branches and their leaves have short
text strings and integers to identify them. Text strings describe object names, while integers allow
software to create compact, encoded representations of the names.
Each MIB variable is assigned an object identifier (OID). The OID is the sequence of numeric labels on
the nodes along a path from the root to the object. For example, as shown in Figure 1-5, the Brocade
SW.MIB OID is 1.3.6.1.4.1.1588, the corresponding name is
iso.org.dod.internet.private.enterprise.bsci. The other branches are part of the standard MIBs, and the
portions relevant to configuring SNMP on a Brocade switch are referenced in the remainder of this
manual.
Management
Station
Agent
TRAP