QoS Overview
Page 38 7210 SAS D, E, K OS Quality of Service Guide
Maximum Burst Size (For Meters/Policers)
The maximum burst size parameter specifies the maximum burst size that can be transmitted by
the source while not complying with the CIR. If the transmitted burst is lower than the MBS value
then the packets is marked as out-profile by the meter to indicate that the traffic is not complying
with CIR. If the packet burst is higher than MBS then packets are marked as red are dropped.
Meter Counters
The 7210 SAS devices maintains the following counters for meters within the system for granular
billing and accounting.
• Counters for packets and or octets marked as in-profile by meter
• Counters for packets and or octets marked as out-of-profile by meter
• Counters for packets and or octets marked as dropped by meter
The counters available vary among the 7210 SAS platform. Not all the counters are supported on
all the platforms. Additionally there are restrictions on the number of counters that can be used
simultaneously with a single meter. Some platforms can only count octets or packets and other can
count both packets and octets. Typically, each meter can maintain a subset of the following
counters. User is provided an option to select the subset of counter they want to use. Counter (and
corresponding accounting record) support available on each of the platform is listed in the 7210
SAS System Management user guide under the “Accounting Records/Logs” section.
Meter Modes
The 7210 SAS devices support following meter modes:
• srtcm: Single Rate Three Color Marking
• trtcm1:Two Rate Three Color Marking
The 7210 SAS-D supports the following meter modes:
• srtcm: Single Rate Three Color Marking
• trtcm1:Two Rate Three Color Marking
• trtcm2:Two Rate Three Color Marking
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