3Com Switch 8800 Configuration Guide
Chapter 44 MAC Address Table Management
44-2
You can configure (add or modify) the MAC address entries manually according to the
actual networking environment. The entries can be static ones or dynamic ones.
44.2 MAC Address Table Management Configuration
The following sections describe the MAC address table management configuration
tasks.
z
Setting MAC Address Table Entries
z
Setting MAC Address Aging Time
z
Maximum MAC Address Number Learned by Ethernet Port and Forwarding
Option Configuration
44.2.1 Setting MAC Address Table Entries
Administrators can manually add, modify, or delete the entries in MAC address table
according to the actual needs. They can also delete all the (unicast) MAC address table
entries related to a specified port or delete a specified type of entries, such as dynamic
entries or static entries.
You can use the following commands to add, modify, or delete the entries in MAC
address table.
Perform the following configuration in system view.
Table 44-1
Set MAC address table entries
Operation
Command
Add/Modify an address entry
mac-address
{
static
|
dynamic
}
mac
-
addr
interface
{
interface
-
name
|
interface
-
type
interface
-
num
}
vlan
vlan
-
id
Delete an address entry
undo mac
-
address
[
static
|
dynamic
]
[
mac
-
addr
[
interface
{
interface
-
name
|
interface
-
type
interface
-
num
} ]
vlan
vlan
-
id
|
interface
{
interface
-
name
|
interface
-
type
interface
-
num
} |
vlan
vlan
-
id
]
44.2.2 Setting MAC Address Aging Time
The setting of an appropriate aging time can effectively implement the function of MAC
address aging. Too long or too short aging time set by subscribers will cause the
problem that the Ethernet switch broadcasts a great mount of data packets without
MAC addresses, which will affect the switch operation performance.
If aging time is set too long, the Ethernet switch will store a great number of out-of-date
MAC address tables. This will consume MAC address table resources and the switch
will not be able to update MAC address table according to the network change.
