Name: Cisco 4500M
Brand: Cisco
Rating: 5 (1 reviews)

2-167

Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW

78-16201-01

Chapter2Cisco IOS Commands for the Catalyst 4500 Series Switches

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

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 4500M Command Reference

Other manuals for Cisco 4500M