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21
Engine ID
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CAUTION
STEP 1
STEP 2
363
The private Object IDs are placed under:
enterprises(1).cisco(9).otherEnterprises(6).ciscosb(1).switch001(101).
The Engine ID is used by SNMPv3 entities to uniquely identify them. An SNMP agent is
considered an authoritative SNMP engine. This means that the agent responds to incoming
messages (Get, GetNext, GetBulk, Set) and sends trap messages to a manager. The agent's
local information is encapsulated in fields in the message.
Each SNMP agent maintains local information that is used in SNMPv3 message exchanges.
The default SNMP Engine ID is comprised of the enterprise number and the default MAC
address. This engine ID must be unique for the administrative domain, so that no two devices
in a network have the same engine ID.
Local information is stored in four MIB variables that are read-only (snmpEngineId,
snmpEngineBoots, snmpEngineTime, and snmpEngineMaxMessageSize).
When the engine ID is changed, all configured users and groups are erased.
To define the SNMP engine ID:
Click SNMP > Engine ID.
Choose which to use for Local Engine ID.
•
Use Default—Select to use the device-generated engine ID. The default engine ID is
based on the device MAC address, and is defined per standard as:
-
First 4 octets—First bit = 1, the rest is the IANA enterprise number.
-
Fifth octet—Set to 3 to indicate the MAC address that follows.
-
Last 6 octets—MAC address of the device.
•
None—No engine ID is used.
•
User Defined—Enter the local device engine ID. The field value is a hexadecimal
string (range: 10 - 64). Each byte in the hexadecimal character strings is represented by
two hexadecimal digits.
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
SNMP
Engine ID
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