Perform the following steps to
configure Frame Relay rate enforcement:
- Define a map class and enter map class
configuration mode:
Router(config)#map-class
frame-relay map-class-name
- Define the rate enforcement parameters to
use:
Router(config-map-class)#[no] frame-relay
traffic-rate average [peak]
average is the
average rate (equivalent to CIR).
peak is the “peak
rate” (equivalent to CIR + Be/t = CIR(1 + Be/Bc)). The default
peak value is the line rate (derived from the bandwidth command).
For SVCs, the configured peak and average rates are converted to the
equivalent CIR, Be, and Bc values for use by SVC signaling. Only one
command format (“traffic rate” or CIR, Be, and Bc) will be
accepted in one map class. The user is warned when entering a second
command type that the previous one is being overwritten.
- Enable both traffic shaping and per-VC
queuing for all VCs (PVCs and SVCs) on a Frame Relay interface:
Router(config-if)#frame-relay
traffic-shaping
For VCs where no specific traffic shaping or
queuing parameters are specified, a set of default values is used.
- Associate a map class with an interface
or subinterface:
Router(config)#frame-relay
class name
Each VC created on the interface/subinterface
inherits all the relevant parameters defined in the frame-relay-class
name. For each VC, the precedence rules are as
follows:
Use a map class associated with VC if it
exists.
- If not, use a map class associated with
subinterface, if it exists.
- If not, use a map class associated with
interface, if it exists.
- If not, use the default parameters.
- (Optional) Apply a map class to a
specific DLCI for which a Frame Relay map statement exists:
Router(config-map-class)#frame-relay
interface-dlci
dlci [broadcast] [ietf |
cisco]
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Lab
Activity |
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Your
main office in Atlanta has a high-speed T1 Frame Relay
connection. It is over-running your remote sites that
only have 56K Frame Relay connections. Install rate
enforcement on your router in Atlanta to control how
much traffic is sent to these sites. Routing should be
handled using IGRP. |
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