Cisco Systems C819HG4GVK9, C819GUK9 manual MAC Address Notification, 10-5

Chapter 10 Configuring the Ethernet Switches

Overview of SNMP MIBs

Use the following syntax to query the SNMP BRIDGE-MIB details:

snmpwalk -v2c <ip address of the ISR, …> public .1.3.6.1.2.1.17 snmpwalk -v2c <ip address of the ISR, …> public@2 .1.3.6.1.2.1.17 snmpwalk -v2c <ip address of the ISR, …> public@3 .1.3.6.1.2.1.17

Note When you create a VLAN “x”, the logical entity public@x is added. If you query with the public community, the L3 MIB is displayed. When you query with public@x, the L2 MIB for VLAN “x” is displayed.

In the context-based approach, the SNMP context mapping commands are used to display the values for L2 interfaces. Each VLAN is mapped to a context. When the user queries with a context, the MIB displays the data for that specific VLAN, which is mapped to the context. In this approach, each VLAN is manually mapped to a context.

To get the BRIDGE-MIB details, use the following commands in the configuration mode:

Router(config)#Routersnmp-server group public v2c context bridge-group

Router(config)#snmp-server community public RW

Router(config)#snmp-server community private RW

Router(config)#snmp-server context bridge-group

Router(config)#snmp mib community-map public context bridge-group

Use the following syntax to query the SNMP BRIDGE-MIB details:

snmpwalk -v2c <ip address of the ISR, …> public@1 .1.3.6.1.2.1.17 ?L2-MIB snmpwalk -v2c <ip address of the ISR, …> private .1.3.6.1.2.1.17?L3-MIB

Note When you query with the public community, the L2 MIB is displayed. Use the private group for L3 MIB.

For more details to configure and retrieve the BRIDGE-MIB details, see The BRIDGE-MIB.

MAC Address Notification

MAC address notification enables you to track users on a network by storing the MAC address activity on the switch. Whenever the switch learns or removes a MAC address, an SNMP notification can be generated and sent to the NMS. If you have many users coming and going from the network, you can set a trap interval time to bundle the notification traps and reduce network traffic. The MAC notification history table stores the MAC address activity for each hardware port for which the trap is enabled. MAC address notifications are generated for dynamic and secure MAC addresses; events are not generated for self addresses, multicast addresses, or other static addresses.

For more details to configure MAC address notification, see Configuring MAC Address Notification Traps.

	Cisco 819 Series Integrated Services Routers Software Configuration Guide
OL-23590-02		10-5