Allied Telesis AT-S63 - Manual (Page 324)

Chapter 19: Quality of Service (QoS) Commands
324 Section II: Advanced Operations
unused tokens will accumulate in the bucket. If the
traffic increases, the excess traffic will be discarded
since no tokens are available for handling the
increase.
If the traffic is below the maximum bandwidth,
unused tokens will accumulate in the bucket since
the actual bandwidth falls below the specified
maximum. The unused tokens will be available for
handling excess traffic should the traffic exceed the
maximum bandwidth. Should an increase in traffic
continue to the point where all the unused tokens
are used up, packets will be discarded.
Unused tokens accumulate in the bucket until the
bucket reaches maximum capacity, set by this
parameter. Once the maximum capacity of the
bucket is reached, no extra tokens are added. The
range is 4 to 512 Kbps.
This parameter should be used with the
MAXBANDWIDTH parameter. Specifying a token
bucket size without also specifying a maximum
bandwidth serves no function.
priority Specifies the priority value in the IEEE 802.1p tag
control field that traffic belonging to this traffic class
is assigned. Priority values range from 0 to 7 with 0
being the lowest priority and 7 being the highest
priority. Incoming frames are mapped into one of
eight Class of Service (CoS) queues based on the
priority value.
If you want the packets to retain the new value
when they exit the switch, change option 9, Remark
Priority, to Yes.
If you specify a new priority in a flow group and a
traffic class, the value in the flow group overrides
the value in the traffic class.
remarkpriority Replaces the user priority value in the packets with
the new value specified with the PRIORITY
parameter, if set to Yes. If set to No, which is the
default, the packets retain their preexisting priority
level when they leave the switch.
tos Specifies a replacement value to write into the Type
of Service (ToS) field of IPv4 packets. The range is
0 to 7.