Blackhole; Broadcast/Unknown Rate Limiting; Verifying Mac-Based Qos Settings; Packet Groupings - 3Com 9100 User Manual

104 C 7: Q S (Q S)
HAPTER UALITY OF ERVICE O
The command to clear the FDB is as follows:
clear fdb

Blackhole

Using the option configures the switch to not forward any
blackhole
packets to the destination MAC address on any ports for the VLAN
specified.
The option is configured using the following command:
blackhole
create fdbentry 00:11:22:33:44:55 vlan default blackhole

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

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 <qosname>
This category of traffic groupings consists of prioritization bits used in

Packet Groupings

IEEE 802.1p packets.