F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

55
Hardware Feature com
p
atible
F5000 No
Firewall module No
U200-A Yes
U200-S Yes
As the MAC address table grows, the forwarding performance of your device might degrade. To prevent
the MAC address table from getting so large that the forwarding performance degrades, you can limit
the number of MAC addresses that a port can learn.
To configure the MAC learning limit on a Layer 2 Ethernet interface or Layer 2 aggregate interface:
Ste
p
Command Remarks
112. Enter system view. system-view N/A
113. Enter Layer 2 Ethernet or Layer 2
aggregate interface view.
interface interface-type
interface-number
Use either command.
Settings in Layer 2 Ethernet or Layer 2
aggregate interface view take effect
only on the specific interface.
114. Configure the MAC learning limit on
the interface or port group, and
configure whether or not frames
with unknown source MAC
addresses can be forwarded when
the MAC learning limit is reached.
mac-address
max-mac-count { count |
disable-forwarding }
The default MAC learning limit varies
with devices.
By default, frames with unknown
source MAC addresses are forwarded
when the MAC learning limit is
reached.
408BDisplaying and maintaining MAC address tables
Task Command Remarks
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 ] ]
[ | { begin | exclude | include } regular-expression ]
Available in any
view.
Display the aging timer for
dynamic MAC address
entries.
display mac-address aging-time [ | { begin | exclude |
include } regular-expression ]
Available in any
view.
409BMAC address table configuration example
1108BNetwork requirements
As shown in 2194HFigure 38:
• The MAC address of Host A is 000f-e235-dc71 and belongs to VLAN 1. It is connected to
GigabitEthernet 0/1 of the device. To prevent MAC address spoofing, add a static entry for the host
in the MAC address table of the device.