Cisco Catalyst 4500 Series Command Reference Guide

2-416
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
mac-address-table dynamic group protocols
mac-address-table dynamic group protocols
To enable the learning of MAC addresses in both the “ip” and “other” protocol buckets, even though the
incoming packet may belong to only one of the protocol buckets, use the
mac-address-table dynamic group protocols command. To disable grouped learning, use the no form
of this command.
mac-address-table dynamic group protocols {ip | other} {ip | other}
no mac-address-table dynamic group protocols {ip | other} {ip | other}
Syntax Description
Defaults The group learning feature is disabled.
Command Modes Global configuration mode
Command History
Usage Guidelines The entries within the “ip” and “other” protocol buckets are created according to the protocol of the
incoming traffic.
When you use the mac-address-table dynamic group protocols command, an incoming MAC address
that might belong to either the “ip” or the “other” protocol bucket, is learned on both protocol buckets.
Therefore, any traffic destined to this MAC address and belonging to any of the protocol buckets is
unicasted to that MAC address, rather than flooded. This reduces the unicast Layer 2 flooding that might
be caused if the incoming traffic from a host belongs to a different protocol bucket than the traffic that
is destined to the sending host.
Examples This example shows that the MAC addresses are initially assigned to either the “ip” or the “other”
protocol bucket:
Switch# show mac-address-table dynamic
Unicast Entries
vlan mac address type protocols port
-------+---------------+--------+---------------------+--------------------
1 0000.0000.5000 dynamic other GigabitEthernet1/1
1 0001.0234.6616 dynamic ip GigabitEthernet3/1
1 0003.3178.ec0a dynamic assigned GigabitEthernet3/1
1 0003.4700.24c3 dynamic ip GigabitEthernet3/1
1 0003.4716.f475 dynamic ip GigabitEthernet3/1
1 0003.4748.75c5 dynamic ip GigabitEthernet3/1
1 0003.47f0.d6a3 dynamic ip GigabitEthernet3/1
1 0003.47f6.a91a dynamic ip GigabitEthernet3/1
ip Specifies the “ip” protocol bucket.
other Specifies the “other” protocol bucket.
Release Modification
12.2(18)EW Support for this command was introduced on the Catalyst 4500 series switch.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E