Metering; Re-Marking - Lenovo CN4093 Application Manual

Metering

Re-Marking

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CN4093 Application Guide for N/OS 8.3
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.
Note: Metering is not supported for IPv6 ACLs. All traffic matching an IPv6 ACL
is considered in-profile for re-marking purposes.
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 traffic

should receive.
 Change the 802.1p priority of a packet.