QoS Overview
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CLI Configuration Guide
H
IERARCHICAL
Q
UEUING
Hierarchical Queuing provides a mechanism of controlled sharing of excess
bandwidth in a hierarchical fashion. The requirement of hierarchical queuing is
illustrated below.
Figure 51: Link Sharing Requirement Example
Two branch offices are linked with 2Mbps link (as shown in the above figure). Five
different type of traffic require an efficient way of sharing the link between, voice,
VPN tunnel and public Internet access.
One possible solution:
Voice: 128, no one else should use this, also high priority.
VPN traffic: Total of 768 Kbps to be shared between SMTP and CVS.
Public Internet: Total of 1 MBPS, to be shared between web and SMTP.
A Link sharing scheme to suite this is deployed on the OA-700 with the help of
hierarchical link sharing feature on the 2Mbps link (as shown in the figure below).
Class in tree structure will be typically of three kinds: Leaf class, Case class, and
root class. Leaf class will have a destination queue associated with it. Depending
on the need of organization, leaf might indicate a flow of certain application or IP
address in a subnet. Case class will have more than two branches, for e.g., it
could be specific IP source address with all the TCP ports as a leaf nodes. Root
class is the tree root.
Содержание OmniAccess 700
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