Chapter 1 – Brocade Multi-Service IronWare QoS and Traffic Management Configuration Guide (Supporting R05.6.00) User Manual
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Multi-Service IronWare QoS and Traffic Management Configuration Guide
1
53-1003037-02
Chapter
1
Configuring Traffic Policing for the Brocade NetIron CES
and Brocade NetIron CER
Traffic policing on Brocade NetIron CES and
Brocade NetIron CER devices
Brocade NetIron CES and Brocade NetIron CER devices provide line-rate traffic policing in hardware
on inbound and outbound ports.
You can configure a device to use one of the following traffic policing modes:
•
Port-based – Limits the rate on an individual physical port to a specified number. Only one
inbound and one outbound port-based traffic policing policy can be applied to a port. (Refer to
“Configuring port-based traffic policing for inbound and outbound ports”
on page 5.) These
policies can be applied to inbound and outbound traffic.
•
Port-and-ACL-based – Limits the rate of IP traffic on an individual physical port that matches
the permit conditions in IP Access Control Lists (ACLs). Layer-2 ACL-based traffic policing is
supported. You can use standard or extended IP ACLs. Standard IP ACLs match traffic based
on source IP address information. Extended ACLs match traffic based on source and
destination IP address and IP protocol information. Extended ACLs for TCP and UDP also match
on source and destination TCP or UDP addresses, and protocol information. These policies can
be applied to inbound and outbound traffic. Brocade NetIron CES and Brocade NetIron CER
devices support up to 3967 (1984 egress and 1983 ingress) policies for a port per packet
processor (PPCR).
Multi-Service IronWare software lets you apply traffic policing parameters directly to a port, or
create a policy map to define a set of traffic policing parameters and apply that policy map to one
or more ports.
For information about how to apply traffic parameters directly to a port, refer to
policing parameters directly to a port”
For information about how to apply traffic policing parameters using a policy map, refer to
traffic policing parameters using a policy map”
Applying traffic policing parameters directly to a port
When you apply a traffic policing parameters directly to a port, two parameters are specified:
average rate and maximum burst. These parameters configure credits and credit totals.
Average rate
The average rate is the maximum number of bits a port can receive during a one-second interval.
The rate of the traffic will not exceed the average rate as specified by the traffic policing policy.
The average rate represents a percentage of line rate (bandwidth) for an interface, expressed in
bits per second (bps). It cannot be larger than the line rate for the port. For the Brocade NetIron
CER and Brocade NetIron CES devices, the average rate can be entered in as any value from 0 up
to the line rate of the port.