Supermicro SSE-F3548S/SSE-F3548SR Configuration User’s Guide
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Marking
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Policing
9.1.1
Classification and Marking
Classification is the process of distinguishing one kind of traffic from another by examining the fieldsin the
packet. Supermicro switches use ACL’s to specify the fields in the frame or packet based on which
incoming IP traffic is classified.
Classification is enabled only if QoS is globally enabled on the switch. QoS isglobally disabledby default, so
no classification occurs.In Supermicro switches, classification can be configured for all interfaces of the
switch or for particular interfaces only.
After classification, the packet is sentfor policing, marking, queuing and scheduling.Marking is the process
of setting or modifying values in the classified traffic. In Supermicro switches, marking can be configured
using a policy map.
9.1.1.1
ClassMap and PolicyMap
IP standard, IP extended, and Layer 2 MAC access control lists (ACLs) can be used to define a group
ofpackets with the same characteristics (class). Only the permit action of ACL’s is permitted for use with
QoS.
The Deny and Redirect ACL actions are not applicable for QoS.
Afteran ACL is associated with a class-map, it can be applied for QoS. When such a configured ACL has a
match with a permit action, further classification can be doneusinga policymap.A policy map specifies the
actions to perform for the traffic class of a class-map. Actions can include setting a specific DSCP value or
the action to take when the traffic is out of profile.
An ACL must be created for each policy and class-map,If more thanone type of traffic needs to be
classified, another ACL and class map can be created and associated. This relationship between the ACL,
class map and policy map is depicted below.
Policy Map
Class Map
ACL
