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JUNOSe 11.1.x Policy Management Configuration Guide
Figure 6: Congestion Management
Examples: One-Rate Rate-Limit Profile
A one-rate rate-limit profile can be configured for hard tail drop rate-limit or
TCP-friendly behavior. Packets can be categorized as committed, conformed, or
exceeded.
You can configure a one-rate rate-limit profile to hard limit a packet flow to a specified
rate. To rate limit the traffic on an interface from source IP address 1.1.1.1 to 1 Mbps,
issue the following commands:
You can also configure a one-rate rate-limit profile to provide a TCP-friendly rate
limiter. To configure a rate limiter with TCP-friendly characteristics, we recommend
that you set the committed burst to allow for 1 second of data at the specified rate,
and the excess burst to allow 1.5 seconds of data at the specified committed rate
plus the committed burst. For example:
Examples: Two-Rate Rate-Limit Profile
You can configure a two-rate rate-limit profile for two different rates, committed and
peak, that are used to define a two-rate, three-color marking mechanism. You can
categorize packets as committed, conformed, or exceeded:
98
Bandwidth Management Overview
host1#configure terminal
host1(config)#ip rate-limit-profile oneMegRlp one-rate
host1(config-rate-limit-profile)#committed-rate 1000000
host1(config-rate-limit-profile)#exit
host1(config)#ip classifier-list claclA ip host 1.1.1.1 any
host1(config)#ip policy-list testPolicy
host1(config-policy-list)#classifier-group claclA
host1(config-policy-list-classifier-group)#rate-limit-profile oneMegRlp
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#exit
host1(config)#interface atm 0/0.0
host1(config-subif)#ip policy input testPolicy statistics enabled
host1(config)# ip rate-limit-profile tcpFriendly8MB one-rate
host1(config-rate-limit-profile)# committed-rate 8000000
host1(config-rate-limit-profile)# committed-burst 1000000
host1(config-rate-limit-profile)# excess-burst 2500000
host1(config-rate-limit-profile)# committed-action transmit
host1(config-rate-limit-profile)# exceeded-action drop
Up to the committed rate, packets are considered to be committed.
From the committed to peak rate, packets are considered to be conformed.
After the peak rate, packets are considered to be exceeded.
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