Chapter 6 Configuring the System
Configuring SNMP
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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
78-6511-05
Enabling NTP Authentication
To ensure the validity of information received from NTP servers, you can
authenticate NTP messages with public-key encryption. This procedure must be
coordinated with the administrator of the NTP servers: the information you enter
will be matched by the servers to authenticate it.
Configuring the Switch for NTP Broadcast-Client Mode
You can configure the switch to receive NTP broadcast messages if there is an
NTP broadcast server, such as a router, broadcasting time information on the
network. You can also enter a value to account for any round-trip delay between
the client and the NTP broadcast server.
Configuring SNMP
If your switch is part of a cluster, the clustering software can change Simple
Network Management Protocol (SNMP) parameters (such as host names) when
the cluster is created. If you are configuring a cluster for SNMP, see the “SNMP
Community Strings” section on page 5-10.
Disabling and Enabling SNMP
SNMP is enabled by default and must be enabled for Cluster Management
features to work properly.
SNMP is always enabled for Catalyst 1900 and Catalyst 2820 switches.
For CLI procedures, refer to the Cisco IOS Release 12.0 documentation on
Cisco.com for additional information and CLI procedures.
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