Enabling Destination Mac Address Triggered Update; Assigning Mac Addresses For Ethernet Ports - H3C S5600 Series Operation Manual

Follow these steps to set the maximum number of MAC addresses a port can learn:
To do...
Enter system view
Enter Ethernet port view
Set the maximum number of MAC
addresses the port can learn
If you have configured the maximum number of MAC addresses that a port can learn, you cannot
enable the MAC address authentication or port security functions on the port, and vice versa.

Enabling Destination MAC Address Triggered Update

By default, a switch updates its MAC address entries based on the source MAC addresses of packets.
However, this may cause the switch to perform unnecessary broadcasts in some applications. For
example, when a port aggregation group is used in an IRF fabric for communications, MAC address
entries of some ports in the aggregation group may not be updated in time, resulting in unnecessary
broadcasts.
The destination MAC address triggered update function solves the above problem by allowing the
switch to update its MAC address entries according to destination MAC addresses in addition to source
MAC addresses. This function improves the availability of the MAC address table.
Follow these steps to enable destination MAC address triggered update:
To do...
Enter system view
Enable destination MAC address
triggered update

Assigning MAC Addresses for Ethernet Ports

By default, no Ethernet port of an S5600 switch is configured with a MAC address. Therefore, when the
switch sends Layer 2 protocol packets, for example, BPDUs of STP, it uses the MAC address
predefined in the protocol as the source address to send the BPDUs. As switches in your network may
use the same source MAC address for Layer 2 protocol data units (PDUs), different ports on a switch
may learn the same MAC address, thus affecting the maintenance of the MAC address table.
To avoid the problem, you are allowed to assign MAC addresses to the Ethernet ports on an S5600
series switch. The idea is to assign a MAC address (called the start port MAC address) for the start
Use the command...
system-view
interface interface-type
interface-number
mac-address max-mac-count
count
Use the command...
system-view
mac-address aging
destination-hit enable
1-7
Remarks
—
—
Required
By default, the number of the MAC
addresses a port can learn is not
limited.
Remarks
—
Required
Disabled by default