Management and Configuration Guide K/KA/KB.15.15

Configuring SNMP notification support
You can enable SNMP trap notification of LLDP data changes detected on advertisements received
from neighbor devices, and control the interval between successive notifications of data changes
on the same neighbor.
SNMPv2c informs
On a switch enabled for SNMPv2c, you can use the snmp-server host inform command
(“Enabling SNMPv2c informs” (page 202)) to send inform requests when certain events occur. When
an SNMP Manager receives an inform request, it can send an SNMP response back to the sending
agent on the switch to let the agent know that the inform request reached its destination.
If the sending agent on the switch does not receive an SNMP response back from the SNMP
Manager within the timeout period, the inform request may be resent, based on the retry count
value.
When you enable SNMPv2c inform requests to be sent, you must specify the IP address and
community name of the management station that will receive the inform notification.
Network security notifications
By default, a switch is enabled to send the SNMP notifications listed in “Supported Notifications”
(page 245) when a network security event (for example, authentication failure) occurs. However,
before security notifications can be sent, you must first configure one or more trap receivers or
SNMPv3 management stations as described in:
• “Configuring an SNMP trap receiver” (page 202)
• “Configuring SNMPv3 notifications” (page 203)
You can manage the default configuration of the switch to disable and re-enable notifications to
be sent for the following types of security events:
• ARP protection events
• Inability to establish a connection with the RADIUS or TACACS+ authentication server
• DHCP snooping events
• Dynamic IP Lockdown hardware resources consumed
• Link change notification
• Invalid password entered in a login attempt through a direct serial, Telnet, or SSH connection
• Manager password changes
• Port-security (web, MAC, or 802.1X) authentication failure
• SNMP authentication failure
• Running configuration changes
SNMP traps on running configuration changes
You can send a specific SNMP trap for any configuration change made in the switch's running
configuration file. The trap will be generated for changes made from any of these interfaces:
• CLI
• Menu
• SNMP (remote SNMP set requests.)
248 Configuring for Network Management Applications