QoS Overview
Page 52 7210 SAS D, E, K OS Quality of Service Guide
• ip-criteria dscp-only and/or ipv6-criteria any or ipv6-criteria dscp-only
• mac-criteria any and ip-criteria any or ip-criteria dscp-only and/or ipv6-criteria dscp-only
• mac-criteria dot1p-only and ip-criteria any or ip-criteria dscp-only and/or ipv6-criteria
dscp-only
NOTE: When specifying both MAC and IP criteria in a single SAP ingress policy, only IPv6
DSCP match is allowed. Other IPv6 fields such as src-address, dst-address, are not allowed to be
used.
The available ingress CAM hardware resources can be allocated as per user needs for use with
different QoS classification match criteria. By default, the system allocates resources to maintain
backward compatibility with release 4.0. Users can modify the resource allocation based on their
need to scale the number of entries or number of associations (that is, number of SAPs using a
policy that uses a particular match criterion). If no resources are allocated to a particular match
criteria used in the policy, then the association of that policy to a SAP will fail. Allocation of
classification entries also allocates meter resources, used to implement the per FC per traffic type
policing function. Please refer to the Resource Allocation for Service Ingress QoS policy
classification rules for 7210 SAS-D and E on page 241 to know more about resource usage and
allocation to SAP ingress policies.
In addition to classification rules listed above, the user has an option to use DEI bit for identifying
the ingress profile and enable color-aware policing. See, Chapter , Discard Eligibility Indicator
(DEI) based Classification and Marking, on page 89.
Service Ingress Classification – IP and Mac Packet fields
The IP and MAC match criteria can be very basic or quite detailed. IP and MAC match criteria are
constructed from policy entries. An entry is identified by a unique, numerical entry ID. A single
entry cannot contain more than one match value for each match criteria. Each match entry has an
action which specifies: the forwarding class of packets that match the entry. The entries are
evaluated in numerical order based on the entry ID from the lowest to highest ID value. The first
entry that matches all match criteria has its action performed.
Table 13, Service Ingress QoS Policy IP Match Criteria for 7210 SAS-D and SAS-E, on page 59
lists the packets fields that can be used for match-criteria used for SAP ingress classification on the
different 7210 platforms.
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