User's Manual

Table Of Contents
356
Users Manual of CS-6306R
Chapter 36. MACFF Configuration
MACFF Settings 36.1
36.1.1 Configuration Tasks
MACFF is to isolate downlink ports of the same VLAN in a switch from exchanging inter-access packets,
enabling these packets to be allocated to the default gateway of client through DHCP server and then to
downlink ports. By capturing the ARP packets between downlink ports, MACFF can prevent downlink ports
from learn ARPs; MACFF replies the gateway’s MAC address, enabling all inter-access packets among all
downlink ports to pass through the gateway.
MACFF needs the support of DHCPR-snooping, so before enabling MACFF you
have to make sure that DHCPR-snooping works normally. ICMP redirection on the
gateway is closed by default. The VLAN management address must be configured
for MACFF-enabled switch.
Enabling or Disabling MACFF
Enabling MACFF in VLAN
Configuring the Default AR of MACFF in VLAN
Configuring other ARs of MACFF in VLAN
Specifying a Physical Port to Shut down MACFF
36.1.1.1 Enabling/Disabling MVC
Run the following commands in global configuration mode.
Command Purpose
macff enable
Enables MACFF.
no macff enable
Resumes the default settings.
This command is used to enable MACFF in global configuration mode.After this command is run, all ARP
packets are listened by switch.
You have to make sure that DHCP-Snooping is enabled before configuring this
command. If the client obtains the address of a switch before this command is run,
the switch cannot add the corresponding binding relationship.