3Com 3C17705, Руководство пользователя

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Configuring FDB Entries 83
Configuring FDB
Entries
To configure entries in the FDB, use the commands listed in Table 21 .
FDB Configuration
Examples
The following example adds a permanent entry to the FDB:
create fdbentry 00:D0:96:BF:31:50 vlan marketing port 4
The permanent entry has the following characteristics:
■
MAC address is 00D096BF3150.
■
VLAN name is
marketing
.
Table 21
FDB Configuration Commands
Command Description
create fdbentry <mac_address>
vlan <name> [blackhole |
<portlist> | dynamic]
{qosprofile <qosname>}
Creates an FDB entry. Specify the following:
■
mac_address
— Device MAC address, using
colon separated bytes.
■
name
— VLAN associated with MAC address.
■
blackhole
— Configures the MAC address as a
blackhole entry.
■
portlist
— Port numbers associated with MAC
address.
■
dynamic
— Specifies that the entry will be learned
dynamically. Used to associated a QoS profile with
a dynamically learned entry.
■
qosname
— QoS profile associated with MAC
address.
If more than one port number is associated with a
permanent MAC entry, packets are multicast to the
multiple destinations.
config fdb agingtime <number>
Configures the FDB aging time. The range is 15
through 1,000,000 seconds. The default value is 300
seconds. A value of 0 indicates that the entry should
never be aged out.
enable learning ports <portlist>
Enables MAC address learning on one or more ports.
disable learning ports
<portlist>
Disables MAC address learning on one or more ports
for security purposes. If MAC address learning is
disabled, only broadcast traffic and packets destined to
a permanent MAC address matching that port
number, are forwarded. The default setting is enabled.