Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH 사용자 설명서

create fdbentry 00:E0:2B:12:34:56 vlan marketing port 3:4

The permanent entry has the following characteristics:

MAC address is 00:E0:2B:12:34:56.

VLAN name is marketing.

Slot number for this device is 3 (only on modular switches).

Port number for this device is 4.

Configuring the FDB Aging Time

You configure the aging time for dynamic FDB entries using the following command:

configure fdb agingtime <seconds>

If the aging time is set to 0, all aging entries in the database are defined as static, nonaging 
entries. This means the entries will not age out, but non-permanent static entries can be 
deleted if the switch is reset.

To display the aging time, use the following command:

show fdb

Adding Virtual MAC Entries from IP ARP Packets

Generally, the FDB is programmed with the source MAC address of frames that contain an IP 
ARP payload. MAC entries present in the ARP payload as Sender-MAC are not learned. 
When IP ARP Sender-MAC learning is enabled, the switch learns both the source MAC 
address and the Sender-MAC from the ARP payload, and the switch programs these MAC 
addresses in the FDB.

This feature is useful when you want the switch to learn the Sender-MAC address for a 
redundant protocol, such as VRRP. For example, if your network has a gateway with a virtual 
MAC address, the switch learns the system MAC address for the gateway. If you enable the 
IP ARP Sender-MAC learning feature, the switch also learns the virtual MAC address 
embedded in IP ARP packets for the gateway IP address.

To enable the IP ARP sender-MAC learning feature, use the following command:

enable learning iparp sender-mac

To view the configuration of this feature, use the following command:

show iparp

To disable this feature, use the following command:

disable learning iparp sender-mac

Clearing FDB Entries

You clear dynamic and permanent entries using different CLI commands.