ADTRAN AOS Version R10.1.0 Command Reference Manual page 1338

Command Reference Guide Global Configuration Mode Command Set
Trap notifications in SNMP v1 and SNMP version 2 (SNMPv2) are sent once and do not require an
acknowledgement upon receipt. With SNMPv3, a new form of notification type was introduced, called an
inform. Unlike a trap sent with SNMPv1/v2, an inform requires a response be sent to the originating entity.
If the originator of the inform notification does not receive the response before a specified timeout, the
originator can resend until an acknowledgement response is received or a specified retry value is reached.
Sending informs requires that the originator of the inform know the user, engine ID, security parameters,
and belong to a group that grants access to the information.
SNMPv3 uses services, such as authentication, privacy, and ACLs to provide a higher level of security not
present with v1 or v2. Of these new services, identifying an SNMP server user on a remote entity is
necessary to receive and originate notifications, and also to generate and respond to commands.
Remote users are specified with an IP address or port number for the remote SNMP entity where the user
resides. Configuration of the SNMP remote engine ID is necessary before SNMPv3 inform notifications
can be acknowledged. This is accomplished using the snmp-server engineID remote command. The
remote entity's SNMP engine ID is used for password authentication and privacy digests. The
configuration acknowledgments of informs will fail if the remote engine ID is not configured first. A
management device must know about the user, the engine ID of the device, and security parameters, such
as authentication, passwords, and security level in order for the command to be processed by the
receiving agent.
60000CRG0-35E Copyright © 2012 ADTRAN, Inc. 1338