Инструкции По Установке для 3com S7906E

 

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The MAC address aging timer takes effect globally on dynamic MAC address entries (learned or 

administratively configured) only. 

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In a stable network, when there has been no traffic activity for a long time, all the dynamic entries in 

the MAC address table maintained by the device will be deleted. When it happens, the device 

broadcasts a large amount of data packets, which may be listened to by unwanted users, resulting 

in security hazards. In this case, you can configure mac-address timer  no-aging for dynamic 

MAC address entries, that is, not to age out dynamic MAC address entries, thus reducing 

broadcasts and ensuring the stability and security of the network. 

 

As the MAC address table is growing, the forwarding performance of your device may degrade. To 

prevent the MAC address table from getting so large that the forwarding performance is affected, you 

can limit the number of MAC addresses that can be learned on a port. 

Follow these steps to configure the MAC learning limit on an Ethernet port, or the Ethernet ports in a 

port group or ONU port: 

Enter system view 

— 

Enter Ethernet 
interface view 

interface interface-type 
interface-number 

Enter port group view 

port-group manual 
port-group-name 

Enter 
Ethernet 
interface 
view, port 
group view, 
or ONU port 
view 

Enter ONU port view 

interface onu 
interface-number 

Use any of these three 
commands. 

The configuration you make in 
Ethernet interface view or ONU 
port view takes effect on the 
current interface only; the 
configuration you make in port 
group view takes effect on all 
the member ports in the port 
group.  

Configure the MAC learning limit on an 
Ethernet port, port group or ONU port 

mac-address 
max-mac-count count 

Required 

No MAC learning limit is 
configured by default. 

 

Display MAC address table 
information 

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

Display the aging timer for 
dynamic MAC address entries 

Available in any view