What is the SNMPv3 Engine ID?

Aruba Employee
Aruba Employee

Product and Software: This article applies to all Aruba controllers and ArubaOS versions.


The Engine ID on the controller is automatically generated. To find the Engine ID used by the controller, look at a packet capture of a SNMPv3 trap generated by the controller. For example, on the packet capture below using Ethereal, note that the Authoritative Engine ID is 000039E7000000A10A0A0A0A 


No. Time Source Destination Protocol Info 
28 27.997115 SNMP Encrypted PDU 


Frame 28 (332 bytes on wire, 332 bytes captured) 
Ethernet II, Src: 00:0b:86:60:0d:da, Dst: 00:0a:e4:36:25:f5 
Internet Protocol, Src Addr: (, Dst Addr: ( 
User Datagram Protocol, Src Port: 32797 (32797), Dst Port: snmptrap (162) 
Simple Network Management Protocol 
Version: 3 (3) 
Message Global Header 
Message Security Parameters 
Message Security Parameters Length: 55 
Authoritative Engine ID: 000039E7000000A10A0A0A0A 
Engine Boots: 59 
Engine Time: 1923 
User Name: userv3 
Authentication Parameter: 21079523A9608F86C31D7BF3 
Privacy Parameter: 0000003B30409739 
Encrypted PDU (211 bytes) 


The Engine ID used by the controller is based on the Aruba private enterprise number plus the IP address, with the value converted to hex. 


39E7 is the Aruba private enterprise number (14823) in hex. 
0A0A0A0A is the IP address of the controller ( in hex.

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‎07-09-2014 04:23 PM
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