Huawei ATN 905 Product Description page 18

ATN 905 Multi-service Access Equipment
Product Description
Features and Functions
Issue 01 (2013-05-30)
Description
Traffic Policing
Queue Scheduling
Congestion
Avoidance
HQoS
QoS for Ethernet
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2 Product Features and Functions
CAR is mainly used for rate limit. In
the implementation of CAR, a token
bucket is used to measure the data
flows that pass through the interfaces
on a router so that only the packets
assigned with tokens can go through
the router in the specified time period.
In this manner, the rates of both
incoming and outgoing traffic are
controlled.
Supports PQ adn WFQ for queue
scheduling on interfaces. Maps
packets of different priorities to
different queues and adopts Round
Robin (RR) on each interface for
queue scheduling.
Supports congestion avoidance.
Monitor the usage of network
resources (such as queues and buffers
in the memory) and discard packets
when the network congestion
intensifies to avoid network overload
by adjusting network traffic.
Random Early Detection (RED) or
Weighted Random Early Detection
(WRED) algorithms are frequently
used in congestion avoidance.
l Provides three levels of scheduling
modes to ensure diverse services.
l Sets parameters such as WRED,
low delay, SP/WFQ, CBS, PBS,
and statistics function for each
queue.
l Sets parameters such as the CIR,
PIR, number of queues, and
algorithm for scheduling queues
for each user.
l Supports HQoS in the L3VPN
scenario.
l Supports interface-based and
VLAN-based HQoS.
Performs simple traffic classification
according to the 802.1p field in VLAN
packets.
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