3com WX3000 Manuel D’Utilisation

 

1-4 

Aging timer only takes effect on dynamic MAC address entries. 

 

Entries in a MAC address table fall into the following categories according to their characteristics and 

configuration methods: 

z 

Static MAC address entry: Also known as permanent MAC address entry. This type of MAC 

address entries are added/removed manually and can not age out by themselves. Using static 

MAC address entries can reduce broadcast packets remarkably and are suitable for networks 

where network devices seldom change. 

z 

Dynamic MAC address entry: Dynamic MAC address entries age out after the configured aging 

time. They are generated by the MAC address learning mechanism or configured manually. 

z 

Blackhole MAC address entry: Blackhole MAC address entries are configured manually. The 

device discards the packets destined for or originated from the MAC addresses contained in 

blackhole MAC address entries. 

 lists the different types of MAC address entries and their characteristics. 

Table 1-1 Characteristics of different types of MAC address entries 

Static MAC address 
entry 

Manually configured 

Unavailable Yes 

Dynamic MAC address 
entry 

Manually configured or 
generated by MAC 
address learning 
mechanism 

Available No 

Blackhole MAC 
address entry 

Manually configured 

Unavailable 

Yes 

 

Complete the following tasks to configure MAC address table management: 

Configuring a MAC Address Entry 

Required 

Setting the Aging Time of MAC Address Entries 

Optional 

Optional 

Optional