Management and Configuration Guide K/KA/KB.15.15

SNMP notifications
The switches:
• Fixed or “Well-Known” Traps: A switch automatically sends fixed traps (such as “coldStart”,
“warmStart”, “linkDown”, and “linkUp”) to trap receivers using the public community name,
which is the default. These traps can also be sent to non-public communities.
• SNMPv2c informs
• SNMP v3 notification process, including traps
This section describes how to configure a switch to send network security and link-change
notifications to configured trap receivers.
Supported Notifications
By default, the following notifications are enabled on a switch:
• Manager password changes
• SNMP authentication failure
• Link-change traps: when the link on a port changes from up to down (linkDown) or down to
up (linkUp)
• Port-security (web, MAC, or 802.1X) authentication failure
• Invalid password entered in a login attempt through a direct serial, Telnet, or SSH connection
• Inability to establish a connection with the RADIUS or TACACS+ authentication server
• DHCP snooping events
• ARP protection events
Configuring SNMP notifications
1. Determine the versions of SNMP notifications that you want to use in your network.
If you want to use SNMPv1 and SNMPv2c traps, you must also configure a trap
receiver.
If you want to use SNMPv3 notifications (including traps), you must also configure
an SNMPv3 management station.
2. To reconfigure any of the SNMP notifications that are enabled by default to be sent to a
management station (trap receiver.)
3. (Optional) See the following sections to configure optional SNMP notification features and
verify the current configuration:
• “Configuring the source IP address for SNMP notifications” (page 210)
• “Viewing SNMP notification configuration” (page 212)
SNMPv1 and SNMPv2c Traps
The switches support the following functionality from earlier SNMP versions (SNMPv1 and
SNMPv2c):
• Trap receivers: A trap receiver is a management station to which the switch sends SNMP traps
and (optionally) event log messages sent from the switch. From the CLI you can configure up
to ten SNMP trap receivers to receive SNMP traps from the switch.
• Fixed or "Well-Known" Traps: A switch automatically sends fixed traps (such as "coldStart",
"warmStart", "linkDown", and "linkUp") to trap receivers using the public community name.
SNMP notifications 245