Technical data

Rate Limiting QoS Rules
© 2012 Meru Networks, Inc. Configuring Quality of Service 245
Rate Limiting QoS Rules
Rate limiting controls the overall traffic throughput sent or received on a network
interface. A specific bandwidth limit can be set for a network or device; then, if the
actual traffic violates that policy at any time, the traffic is shaped in some way. In
this implementation, packets are dropped until the traffic flow conforms to the
policy with some queuing (delaying packets in transit) applied.
Rate Limiting with the CLI
You can rate limit traffic by turning on Traffic Control and using the Token Bucket
Rate as the token bucket limiter. Follow these steps to rate limit the client
10.11.31.115 to approximately 3Mbps and then run a quick test to verify function-
ality.
1. Determine the token bucket rate to achieve the desired rate limit. In the example
below, we’ll limit it to 3Mbps (3Mbps = 3000000bps. 3000000/8/8=46875).
2. Create a qosrule that does rate limiting for a client.
Controller1# sh qosrule 23
QoS and Firewall Rules
ID : 23
Id Class flow class : on
Destination IP : 10.11.31.115 (this is the client to be rate limited)
Destination IP match : on
Destination IP flow class : on
Destination Netmask : 255.255.255.255
Destination Port : 0
Destination Port match : none
Destination Port flow class : none
Source IP : 0.0.0.0
Source IP match : none
Source IP flow class : none
Source Netmask : 0.0.0.0
Source Port : 0
Source Port match : none
Station Assignment Aging Time (s)
Sets the time period after which stations will begin aging out.
Maximum Calls Per Interference
Region
Specifies the number of calls that are permitted in a given
interference area.
Table 18: Global Quality-of-Service Parameters
Command Purpose