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27-6
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
Chapter 27 Configuring SNMP
Configuring SNMP
SNMP Configuration Guidelines
If the switch starts and the switch startup configuration has at least one snmp-server global
configuration command, the SNMP agent is enabled.
An SNMP group is a table that maps SNMP users to SNMP views. An SNMP user is a member of an
SNMP group. An SNMP host is the recipient of an SNMP trap operation. An SNMP engine ID is a name
for the local or remote SNMP engine.
Note Before using alarm profiles to set the Catalyst 2955 switch to send SNMP alarm trap notifications to an
SNMP server, you must first enable SNMP by using the snmp-server enable traps alarms global
configuration command.
When configuring SNMP, follow these guidelines:
• When configuring an SNMP group, do not specify a notify view. The snmp-server host global
configuration command autogenerates a notify view for the user and then adds it to the group
associated with that user. Modifying the group's notify view affects all users associated with that
group. See the Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 for
information about when you should configure notify views.
• To configure a remote user, specify the IP address or port number for the remote SNMP agent of the
device where the user resides.
• Before you configure remote users for a particular agent, configure the SNMP engine ID, using the
snmp-server engineID global configuration with the remote option. The remote agent's SNMP
engine ID and user password are used to compute the authentication and privacy digests. If you do
not configure the remote engine ID first, the configuration command fails.
• When configuring SNMP informs, you need to configure the SNMP engine ID for the remote agent
in the SNMP database before you can send proxy requests or informs to it.
• If a local user is not associated with a remote host, the switch does not send informs for the auth
(authNoPriv) and the priv (authPriv) authentication levels.
Ta b l e 27-3 Default SNMP Configuration
Feature Default Setting
SNMP agent Disabled
1
.
1. This is the default when the switch starts and the startup configuration does not have any snmp-server global configuration
commands.
SNMP community strings Read-Only: Public
Read-Write: Private
SNMP trap receiver None configured.
SNMP traps None enabled except the trap for TCP connections (tty).
SNMP version If no version keyword is present, the default is Version 1.
SNMPv3 authentication If no keyword is entered, the default is the noauth (noAuthNoPriv)
security level.
SNMP notification type If no type is specified, all notifications are sent.