Acl Metering And Re-Marking; Metering; Re-Marking - Lenovo Flex System Fabric CN4093 Application Manual

ACL Metering and Re-Marking

Metering

Re-Marking

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CN4093 Application Guide for N/OS 8.4
You can define a profile for the aggregate traffic flowing through the switch by
configuring a QoS meter (if desired) and assigning ACLs to ports.
Note: When you add ACLs to a port, make sure they are ordered correctly in terms
of precedence (see "ACL Order of Precedence" on page
Actions taken by an ACL are called In‐Profile actions. You can configure additional
In‐Profile and Out‐of‐Profile actions on a port. Data traffic can be metered, and
re‐marked to ensure that the traffic flow provides certain levels of service in terms
of bandwidth for different types of network traffic.
QoS metering provides different levels of service to data streams through
user‐configurable parameters. A meter is used to measure the traffic stream against
a traffic profile which you create. Thus, creating meters yields In‐Profile and
Out‐of‐Profile traffic for each ACL, as follows:
 In‐Profile–If there is no meter configured or if the packet conforms to the meter,
the packet is classified as In‐Profile.
 Out‐of‐Profile–If a meter is configured and the packet does not conform to the
meter (exceeds the committed rate or maximum burst rate of the meter), the
packet is classified as Out‐of‐Profile.
Using meters, you set a Committed Rate in Kbps (1000 bits per second in each
Kbps). All traffic within this Committed Rate is In‐Profile. Additionally, you can
set a Maximum Burst Size that specifies an allowed data burst larger than the
Committed Rate for a brief period. These parameters define the In‐Profile traffic.
Meters keep the sorted packets within certain parameters. You can configure a
meter on an ACL, and perform actions on metered traffic, such as packet
re‐marking.
Re‐marking allows for the treatment of packets to be reset based on new network
specifications or desired levels of service. You can configure the ACL to re‐mark a
packet as follows:
 Change the DSCP value of a packet, used to specify the service level that traffic
should receive.
 Change the 802.1p priority of a packet.
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