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Both VLAN QoS and Source Port QoS depend on 802.1Q tagging to carry the QoS
parameters across VLAN boundaries or switch boundaries. In order to allow these QoS
types to be effectrive end-to-end, you should make sure your switch-to-switch links use
tagged ports.
• Custom Policy lets you specify the components for an IP-based policy, without any
predefinition of relevant policy components.
Each policy type (except for Custom) acts as a template by predefining certain
components of the policy. For example, in an Application policy, only endpoints for one
side of the policy need to be entered. The other side of the policy is always "ANY" and
the traffic direction is always bi-directional.
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A QoS policy in the ExtremeWare Enterprise Manager Policy System is defined as
shown in Figure 8-5.
A policy is composed of:
• A name and description that you supply when you create the policy.
• Definitions of the origin and destination of the traffic affected by the policy. This can
be defined as endpoints using the set of policy objects described below (see "Policy
Objects"), or as an application or L4 port.
• The traffic direction (which is predefined for some of the policy types).
• The treatment to be applied.
• The implementation type (IP QoS, Source Port QoS, or VLAN QoS), which also may
be predefined based on the policy type or endpoint types.
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8-5
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