Supermicro SSE-G2252 User Manual page 973

• If Tc is less than BC, Tc is incremented by one
• If Te is less then BE, Te is incremented by one
• Otherwise neither Tc nor Te is incremented
When a packet of size B bytes arrives at time t, the following happens if srTCM is
configured to operate in color-blind mode:
If Tc(t)-B ≥ 0, the packet is green and Tc is decremented by B down to the
•
minimum value of 0
If Te(t)-B ≥ 0, the packets is yellow and Te is decremented by B down to the
•
minimum value of 0
• Otherwise the packet is red and neither Tc nor Te is decremented
When a packet of size B bytes arrives at time t, the following happens if srTCM is
configured to operate in color-aware mode:
If the packet has been precolored as green and Tc(t)-B ≥ 0, the packet is green
•
and Tc is decremented by B down to the minimum value of 0
If the packet has been precolored as yellow or green and if Te(t)-B ≥ 0, the
•
packets is yellow and Te is decremented by B down to the minimum value of 0
• Otherwise the packet is red and neither Tc nor Te is decremented
The metering policy guarantees a deterministic behavior where the volume of green
packets is never smaller than what has been determined by the CIR and BC, that is,
tokens of a given color are always spent on packets of that color. Refer to RFC 2697
for more information on other aspects of srTCM.
Example
This example creates a policy called "rd-policy," uses the
previously defined "rd-class," uses the
incoming packets will receive, and then uses the police srtcm-color-blind command to
limit the average bandwidth to 100,000 Kbps, the committed burst rate to 4000 bytes,
the excess burst rate to 6000 bytes, to remark any packets exceeding the committed
burst size, and to drop any packets exceeding the excess burst size.
SSE-G2252(config)#policy-map rd-policy
SSE-G2252(config-pmap)#class rd-class
SSE-G2252(config-pmap-c)#set phb 3
SSE-G2252(config-pmap-c)#police srtcm-color-blind 100000 4000 6000
conform-action transmit exceed-action 0 violate-action drop
SSE-G2252(config-pmap-c)#
Chapter 37: Quality of Service Commands
class
set phb command to classify the service that
37-11
command to specify the