Cisco Catalyst 4500 Series, Software Configuration Manual

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 4 Administering the Switch
Managing the ARP Table
Displaying Address Table Entries
You can display the MAC address table by using one or more of the privileged EXEC commands
described in
Table 4-5 .
Managing the ARP Table
To communicate with a device (over Ethernet, for example), the software first must learn the 48-bit MAC
address or the local data link address of that device. The process of learning the local data link address
from an IP address is called
address resolution .
The Address Resolution Protocol (ARP) associates a host IP address with the corresponding media or
MAC addresses and the VLAN ID. Using an IP address, ARP finds the associated MAC address. When
a MAC address is found, the IP-MAC address association is stored in an ARP cache for rapid retrieval
and the IP datagram is encapsulated in a link-layer frame and sent over the network. Encapsulation of IP
datagrams and ARP requests and replies on IEEE 802 networks other than Ethernet is specified by the
Subnetwork Access Protocol (SNAP). By default, standard Ethernet-style ARP encapsulation
(represented by the
arpa keyword) is enabled on the IP interface.
ARP entries added manually to the table do not age and must be manually removed.
For CLI procedures, see the Cisco IOS Release 12.3 documentation on Cisco.com.
Configuring Embedded CiscoView Support
The Catalyst 4500 series switch supports CiscoView web-based administration using the Catalyst Web
Interface (CWI) tool. CiscoView is a device management application that can be embedded on the switch
flash and provides dynamic status, monitoring, and configuration information for your switch.
CiscoView displays a physical view of your switch chassis with color-coded modules and ports and
monitoring capabilities that display the switch status, performance, and other statistics. Configuration
capabilities allow comprehensive changes to devices, if the required security privileges have been
granted. The configuration and monitoring capabilities for the Catalyst 4500 series of switches mirror
those available in CiscoView in all server-based CiscoWorks solutions, including CiscoWorks LAN
Management Solution (LMS) and CiscoWorks Routed WAN Management Solution (RWAN).
Table 4-5 Commands for Displaying the MAC Address Table
Command Description
show ip igmp snooping groups Displays the Layer 2 multicast entries for all VLANs or the specified VLAN.
show mac address-table address Displays MAC address table information for the specified MAC address.
show mac address-table aging-time Displays the aging time in all VLANs or the specified VLAN.
show mac address-table count Displays the number of addresses present in all VLANs or the specified VLAN.
show mac address-table dynamic Displays only dynamic MAC address table entries.
show mac address-table interface Displays the MAC address table information for the specified interface.
show mac address-table notification Displays the MAC notification parameters and history table.
show mac address-table static Displays only static MAC address table entries.
show mac address-table vlan Displays the MAC address table information for the specified VLAN.