User guide

E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
9-11
T
RAFFIC
G
ROUPINGS AND
C
REATING A
Q
O
S P
OLICY
D
YNAMIC
MAC A
DDRESSES
Dynamic MAC addresses can be assigned a QoS profile whenever traffic is destined to
the MAC address. For any port on which the specified MAC address is learned in the
specified VLAN, the port is assigned the specified QoS profile. For example:
create fdbentry 00:11:22:33:44:55 vlan default dynamic qosprofile qp3
The QoS profile is assigned when the MAC address is learned. If a client's location
moves, the assigned QoS profile moves with the device. If the MAC address entry
already exists in the FDB, you can clear the forwarding database so that the QoS profile
can be applied when the entry is added again. The command to clear the FDB is as
follows:
clear fdb
B
LACKHOLE
MAC A
DDRESS
Using the
blackhole
option configures the switch to not forward any packets to the desti-
nation MAC address on any ports for the VLAN specified. The
blackhole
option is con-
figured using the following command:
create fdbentry 00:11:22:33:44:55 vlan default blackhole
BROADCAST/UNKNOWN RATE LIMITING MAC ADDRESS
It is possible to assign broadcast and unknown destination packets to a QoS profile that
has the desired priority and bandwidth parameters. Broadcast/unknown rate limiting is
an extension of the QoS feature used for destination MAC addresses.
For example, if you want to limit broadcast and unknown traffic on the VLAN default to
the bandwidth and priority defined in QoS profile qp3, the command is:
create fdbentry ff:ff:ff:ff:ff:ff vlan default dynamic qp3
IP multicast traffic is subject to broadcast and unknown rate limiting only when
IGMP snooping is disabled.