Simple Network Management Protocol
3-37
3
Specifying a Remote Engine ID
To send inform messages to an SNMPv3 user on a remote device, you must first
specify the engine identifier for the SNMP agent on the remote device where the
user resides. The remote engine ID is used to compute the security digest for
authenticating and encrypting packets sent to a user on the remote host.
SNMP passwords are localized using the engine ID of the authoritative agent. For
informs, the authoritative SNMP agent is the remote agent. You therefore need to
configure the remote agent’s SNMP engine ID before you can send proxy requests
or informs to it.
A new engine ID can be specified by entering 5 to 32 octets of hexadecimal
characters; that is, 9 to 64 hexadecimal characters. If an odd number of
hexadecimal characters are specified, a trailing zero is added to the value to fill the
octet. For example, entering the value “123456789” results in an engine ID of
“1234567890.”
Web – Click SNMP, SNMPv3, Remote Engine ID.
Figure 3-28 Setting a Remote Engine ID
CLI – This example specifies a remote SNMPv3 engine ID.
Configuring SNMPv3 Users
Each SNMPv3 user is defined by a unique name. Users must be configured with a
specific security level and assigned to a group. The SNMPv3 group restricts users to
a specific read, write, and notify view.
Command Attributes
• User Name – The name of user connecting to the SNMP agent.
(Range: 1-32 characters)
• Group Name – The name of the SNMP group to which the user is assigned.
(Range: 1-32 characters)
• Model – The user security model; SNMP v1, v2c or v3.
Console(config)
#snmp-server engineID remote 54321fedcba0 192.168.1.19 4-107
Console(config)#exit
Console#show snmp engine-id
4-107
Local SNMP engineID: 83010000030000352810030000
Local SNMP engineBoots: 1
Remote SNMP engineID: 54321fedcba0 IP address 192.168.1.25
Console#
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