Operation Manual – MAC Address Table Management
H3C S3610&S5510 Series Ethernet Switches
Chapter 1 MAC Address Table
Management Configuration
1-2
Note:
Dynamically learned MAC addresses cannot overwrite static MAC address entries, but
the latter can overwrite the former.
As shown in
, when forwarding a frame, the switch looks up the MAC address
table. If an entry is available for the destination MAC address, the switch forwards the
frame directly from the hardware. If not, it does the following:
Broadcast the frame.
3) After the frame reaches the destination, the destination sends back a response
with its MAC address. (If no response is received, the frame will be dropped.)
4)
Upon receipt of the response, the device adds an entry in the MAC address table,
indicating from which port the frames destined for the MAC address should be
sent.
5)
Forward subsequent frames destined for the same MAC address directly from the
hardware.
6)
Discard the frames which cannot reach the destination MAC address.
Port 1
Port 2
MAC address
Port
MAC A
1
MAC B
1
MAC C
2
MAC D
2
MAC A
MAC B
MAC C
MAC D
Figure 1-1
Forward frames using the MAC address table
1.2 Configuring MAC Address Table Management
This section covers these topics:
z
Configuring MAC Address Entries
z
Configuring MAC Address Aging Timer
z
Configuring the Maximum Number of MAC Addresses an Ethernet Port or a Port
1.2.1 Configuring MAC Address Entries
Follow these steps to add, modify, or remove entries in the MAC address table:
