Intel 480T, User Manual

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C H A P T E R 8 Quality of Service (QoS)
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
MAC Address Blackhole
Using the
blackhole
option configures the switch to not forward
any packets to the destination MAC address on any ports for the
VLAN specified. The
blackhole
option is configured using the
following command:
create fdbentry 00:11:22:33:44:55 vlan default
blackhole
MAC Address Broadcast/Unknown Rate Limiting
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
Note IP multicast traffic is subject to broadcast and unknown
rate limiting only when IGMP snooping is disabled.
Verifying MAC-Based QoS Settings
To verify any of the MAC-based QoS settings, use either the
command
show fdb perm
or the command
show qosprofile <qosprofile>