Table of Contents

Chapter 1 MAC Address Table Management Configuration Commands. 1-1

1.1 MAC Address Table Management Configuration Commands. 1-1

1.1.1 display mac-address. 1-1

1.1.2 display mac-address aging-time. 1-2

1.1.3 mac-address (Ethernet port view) 1-3

1.1.4 mac-address (System view) 1-4

1.1.5 mac-address max-mac-count 1-5

1.1.6 mac-address timer 1-6

 

Chapter 1  MAC Address Table Management Configuration Commands

1.1  MAC Address Table Management Configuration Commands

1.1.1  display mac-address

Syntax

display mac-address blackhole [ vlan vlan-id ] [ count ]

display mac-address [ mac-address [ vlan vlan-id ] | [ dynamic | static ] [ interface interface-type interface-number ] [ vlan vlan-id ] [ count ] ]

View

Any view

Parameters

blackhole: Displays blackhole MAC address entries. These entries do not age but you can add or remove them. The packets whose destination MAC addresses match blackhole MAC address entries are dropped.

vlan vlan-id: Displays MAC address entries of the specified VLAN, which is in the range 1 to 4094.

count: Displays the total number of MAC addresses in the MAC address table.

mac-address: Displays MAC address entries in a specified MAC address, in the format of H-H-H.

dynamic: Displays dynamic MAC address entries. Aging time is set for these entries.

static: Displays static MAC address entries. Similar to blackhole MAC address entries, these entries do not age but you can add or remove them.

interface interface-type interface-number: Displays MAC address learning status of the specified interface. interface-type interface-number specifies an interface by its type and number.

Description

Use the display mac-address command to display information about the MAC address table.

Related commands: mac-address (system view), mac-address (Ethernet interface view),  mac-address timer.

Examples

# Display the MAC address table entry for MAC address 00e0-fc01-0101.

<Sysname> display mac-address 00e0-fc01-0101

MAC ADDR         VLAN ID   STATE                PORT INDEX   AGING TIME(s)

00e0-fc01-0101     1       Learned            Ethernet1/0/1  AGING

Table 1-1 Description on the fields of the display mac-address command

Field	Description
MAC ADDR	MAC address
VLAN ID	ID of the VLAN to which the MAC address belongs
STATE	State of a MAC address, which could be Config static, Dynamic, Learned and Blackhole
PORT INDEX	Port number (Displayed as N/A for a blackhole MAC address)
AGING TIME(s)	Aging time, which could be: l      AGING, indicates that the entry is aging. l      NOAGED, indicates that the entry does not age.

 

1.1.2  display mac-address aging-time

Syntax

display mac-address aging-time

View

Any view

Parameters

None

Description

Use the display mac-address aging-time command to display the aging time of dynamic entries in the MAC address table.

Related commands: mac-address (system view), mac-address (Ethernet interface view), mac-address timer, display mac-address.

Examples

# Display the aging time of dynamic entries in the MAC address table.

<Sysname> display mac-address aging-time

Mac address aging time: 300s

The above information indicates that the aging time of dynamic entries in the MAC address table is 300 seconds.

1.1.3  mac-address (Ethernet port view)

Syntax

mac-address { dynamic | static } mac-address vlan vlan-id

undo mac-address { dynamic | static } mac-address vlan vlan-id

View

Ethernet port view

Parameters

dynamic: Dynamic MAC address entries. Aging time is set for these entries.

static: Static MAC address entries. Similar to blackhole MAC address entries, these entries do not age but you can add or remove them.

mac-address: Specifies a MAC address in the format of H-H-H.

vlan vlan-id: Specifies the VLAN to which the Ethernet port belongs., where vlan-id is the specified VLAN ID, in the range 1 to 4094.

Description

Use the mac-address command to add or modify a MAC address entry on the specified Ethernet port.

Use the undo mac-address command to remove a MAC address entry on the Ethernet port.

Note that:

l           As your MAC address entries configuration cannot survive a reboot, save it after completing the configuration. The dynamic MAC address table entries however will be lost whether you save the configuration or not.

l           You cannot configure a static or dynamic MAC address entry on an aggregation port.

Related commands: display mac-address.

Examples

# Add a static entry for MAC address 00e0-fc01-0101 on port Ethernet 1/0/1 which belongs to VLAN 2.

<Sysname> system-view

[Sysname] interface ethernet 1/0/1

[Sysname-Ethernet1/0/1] mac-address static 00e0-fc01-0101 vlan 2

1.1.4  mac-address (System view)

Syntax

mac-address blackhole mac-address vlan vlan-id

mac-address { dynamic | static } mac-address interface interface-type interface-number vlan vlan-id

undo mac-address [ { dynamic | static } mac-address interface interface-type interface-number vlan vlan-id ]

undo mac-address [ blackhole | dynamic | static ] [ mac-address ] vlan vlan-id

undo mac-address [ dynamic | static ] mac-address interface interface-type interface-number vlan vlan-id

undo mac-address [ dynamic | static ] interface interface-type interface-number

View

System view

Parameters

blackhole: Blackhole MAC address entries. These entries do not age but you can add or remove them. The packets whose destination MAC addresses match blackhole MAC address entries are dropped.

mac-address: Specifies a MAC address in the format of H-H-H.

vlan vlan-id: Specifies the VLAN to which the Ethernet port belongs., where vlan-id is the specified VLAN ID, in the range 1 to 4094.

dynamic: Dynamic MAC address entries. Aging time is set for these entries.

static: Static MAC address entries. Similar to blackhole MAC address entries, these entries do not age but you can add or remove them.

interface interface-type interface-number: Outbound port, with interface-type interface-number representing the port type and number.

Description

Use the mac-address command to add or modify a MAC address entry.

Use the undo mac-address [ { blackhole | dynamic | static } mac-address interface interface-type interface-number vlan vlan-id ] command to remove one or all MAC address entries.

Use the undo mac-address [ blackhole | dynamic | static ] [ mac-address ] vlan vlan-id command to remove a MAC address entry, MAC address entries of a specified type, or all MAC address entries for a VLAN.

Use the undo mac-address [ blackhole | dynamic | static ] interface interface-type interface-number command to remove a MAC address entry, MAC address entries of a specified type, or all MAC address entries for an Ethernet port.

Use the undo mac-address [ blackhole | dynamic | static ] [ mac-address ] interface interface-type interface-number vlan vlan-id command to remove a MAC address entry or all MAC address entries for an Ethernet port.

Note that you can change a dynamic entry to a static or blackhole entry but not vice versa.

As your MAC address entries configuration cannot survive a reboot, save it after completing the configuration. The dynamic entries however will be lost whether you save the configuration or not.

Related commands: display mac-address.

Examples

# Add a static entry for MAC address 00e0-fc01-0101. All frames destined to this MAC address are sent out of port Ethernet 1/0/1 which belongs to VLAN 2.

<Sysname> system-view

[Sysname] mac-address static 00e0-fc01-0101 interface ethernet 1/0/1 vlan 2

1.1.5  mac-address max-mac-count

Syntax

mac-address max-mac-count { count | disable-forwarding }

undo mac-address max-mac-count [ disable-forwarding ]

View

Ethernet port view, port group view

Parameters

count: Maximum number of MAC addresses that can be learned on a port. When the argument takes 0, the VLAN is not allowed to learn MAC addresses. The value ranges from 0 to 16384.

disable-forwarding: Disables forwarding of frames with unknown destination MAC addresses after the number of learned MAC addresses reaches the upper limit.

Description

Use the mac-address max-mac-count count command to configure the maximum number of MAC addresses that can be learned on an Ethernet port.

Use the mac-address max-mac-count disable-forwarding command to configure whether forwarding frames with unknown destination MAC addresses is allowed after the number of learned MAC addresses reaches the upper limit.

Use the undo mac-address max-mac-count command to restore the default maximum number of MAC addresses that can be learned on an Ethernet port.

Use the undo mac-address max-mac-count disable-forwarding command to allow forwarding frames received on an Ethernet port with unknown destination MAC addresses after the number of learned MAC addresses reaches the upper limit.

The default maximum number of MAC addresses that can be learned on a port is not configured.

Executed in Ethernet port view, the command takes effect on the current port only; executed in port group view, the command takes effect on all ports in the port group.

Related commands: mac-address, mac-address timer.

Examples

# Set the maximum number of MAC addresses that can be learned on port Ethernet 1/0/1 to 600. After this upper limit is reached, frames received with unknown destination MAC addresses on the port will not be forwarded.

<Sysname> system-view

[Sysname] interface ethernet 1/0/1

[Sysname-Ethernet1/0/1] mac-address max-mac-count 600

[Sysname-Ethernet1/0/1] mac-address max-mac-count disable-forwarding

1.1.6  mac-address timer

Syntax

mac-address timer { aging seconds | no-aging }

undo mac-address timer aging

View

System view

Parameters

aging seconds: Sets an aging timer in seconds for dynamic MAC address entries, in the range 10 to 630.

no-aging: Sets dynamic MAC address entries not to age.

Description

Use the mac-address timer command to configure the aging timer for dynamic MAC address entries.

Use the undo mac-address timer command to restore the default.

By default the aging timer is 300 seconds.

Set the aging timer appropriately: a long aging interval may cause the MAC address table to retain outdated entries and fail to accommodate latest network changes; a short interval may result in removal of valid entries and hence unnecessary broadcasts which may affect device performance.

Examples

# Set the aging timer for dynamic MAC address entries to 500 seconds.

<Sysname> system-view

[Sysname] mac-address timer aging 500