Configuring Mac Address Table Management; Configuring Mac Address Entries; Disabling Global Mac Address Learning; Disabling Mac Address Learning On An Ethernet Port Or Aggregation Port - 3Com MSR 50 Series Configuration Manual

2166 C 121: MAC A
HAPTER
Configuring MAC
Address Table
Management
Configuring MAC
Address Entries
Disabling Global MAC
Address Learning
T M C
DDRESS ABLE ANAGEMENT
Unicast mode: If an entry is available for the destination MAC address, the
■
device forwards the frame directly from the hardware.
Broadcast mode: If the device receives a frame with the destination address
■
being all Fs, or no entry is available for the destination MAC address, the device
broadcasts the frame to all the interfaces except the receiving interface.
Figure 636 Forward frames using the MAC address table
MAC address
MAC A
MAC B
Port 1
This section covers these topics:
"Configuring MAC Address Entries" on page 2166
■

"Disabling MAC Address Learning on an Ethernet Port or Aggregation Port

■
Group" on page 2167
"Configuring MAC Address Aging Timer" on page 2167
■
"Configuring Maximum Number of MAC Addresses an Ethernet Port or
■
Aggregation Port Group Can Learn" on page 2168
Follow these steps to add, modify, or remove entries in the MAC address table:
To do...
Enter system view
Add/modify a MAC address
entry
Enter Ethernet interface view
Add/modify MAC address
entries under the specified
interface view
You may need to disable MAC address learning sometimes to prevent the MAC
address table from being saturated, for example, when your device is being
attacked by a great deal of packets with different source MAC addresses.
ONFIGURATION
Port
MAC A 1
MAC B 1
MAC C 2
MAC D 2
MAC C
MAC D
Port 2
Use the command...
system-view
mac-address blackhole mac-address vlan
vlan-id
mac-address { dynamic | static }
mac-address interface interface-type
interface-number vlan vlan-id
interface interface-type interface-number
mac-address { dynamic | static }
mac-address vlan vlan-id
Remarks
-
Required
-
Required