Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
mac-address-table dynamic group protocols
mac-address-tab le dynamic g roup protocols
To enable th e lea rn ing o f M AC addr ess es i n b oth t he “ip ” a nd “o th er” pr otoc ol b uck ets , eve n th ou gh t he
incoming packet may belong to only one of the protocol buckets, use the
mac-address-table dyna mic group protocols comma nd. To disable grouped learning, use the no form
of this command.
mac-address-table dynamic group protocol s {ip | other} { ip | other}
no mac-address-table dynami c group proto cols {ip | other} {ip | other}
Syntax Description
Defaults The group learni ng feature is disabled.
Command Modes Global configura tion mode
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 “ot her” protocol bucket, is lea rned 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
1 0003.ba06.4538 dynamic ip GigabitEthernet3/1
1 0003.fd63.3eb4 dynamic ip GigabitEthernet3/1
1 0004.2326.18a1 dynamic ip GigabitEthernet3/1
1 0004.5a5d.de53 dynamic ip GigabitEthernet3/1
1 0004.5a5e.6ecc dynamic ip GigabitEthernet3/1
1 0004.5a5e.f60e dynamic ip GigabitEthernet3/1
ip Specifies the “ ip” protoc ol buc ket.
other Specifies the “other” protocol bucket.