CLI Reference Guide-R04

Chapter 1 | Initial Switch Configuration
Enabling SNMP Management Access
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Joined group address(es):
ff02::1:ff00:fd
ff02::1:ff11:6700
ff02::1
IPv6 link MTU is 1500 bytes
ND DAD is enabled, number of DAD attempts: 3.
ND retransmit interval is 1000 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised router lifetime is 1800 seconds
Console#
Enabling SNMP Management Access
The switch can be configured to accept management commands from Simple
Network Management Protocol (SNMP) applications. You can configure the switch
to respond to SNMP requests or generate SNMP traps.
When SNMP management stations send requests to the switch (either to return
information or to set a parameter), the switch provides the requested data or sets
the specified parameter. The switch can also be configured to send information to
SNMP managers (without being requested by the managers) through trap
messages, which inform the manager that certain events have occurred.
The switch includes an SNMP agent that supports SNMP version 1, 2c, and 3 clients.
To provide management access for version 1 or 2c clients, you must specify a
community string. The switch provides a default MIB View (i.e., an SNMPv3
construct) for the default “public” community string that provides read access to
the entire MIB tree, and a default view for the “private” community string that
provides read/write access to the entire MIB tree. However, you may assign new
views to version 1 or 2c community strings that suit your specific security
requirements (see snmp-server view command).
Community Strings (for SNMP version 1 and 2c clients)
Community strings are used to control management access to SNMP version 1 and
2c stations, as well as to authorize SNMP stations to receive trap messages from the
switch. You therefore need to assign community strings to specified users, and set
the access level.
The default strings are:
◆ public - with read-only access. Authorized management stations are only able
to retrieve MIB objects.
◆ private - with read/write access. Authorized management stations are able to
both retrieve and modify MIB objects.
To prevent unauthorized access to the switch from SNMP version 1 or 2c clients, it is
recommended that you change the default community strings.