What are the three configuration parameters for Random Early Detection (RED)?
The three configuration parameters for RED are minimum threshold, maximum threshold, and mark probability denominator.
How does Random Early Detection (RED) use the mark probability denominator (MPD) configuration parameter?
MPD is an integer that dictates to RED to drop 1 of MPD (as many packets as the value of mark probability denominator), while the size of the queue is between the values of minimum and maximum thresholds.
What are the three modes that Random Early Detection (RED) runs in?
– No-drop – When the queue size is below the minimum threshold value. – Random-drop – When the queue size is between the minimum and maximum thresholds.
– Full-drop (tail-drop) – When the queue size rows beyond the maximum threshold value.
How does Weighted Random Early Detection (WRED) differ from Random Early Detection (RED)?
WRED has the added capability of differentiating between high- and low-priority traffic. With WRED, you can set up a different profile for each traffic priority. When a packet arrives, first based on its IP presedence or DSCP value, its profile is recognized.
Describe the use of Class-Based Weighted Random Early Detection (CBWRED).
Applying WRED inside a CBWFQ system yields CBWRED.
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How do you simultaneously apply Weighted Random Early Detection (WRED) and WFQ to a class policy?
You can not apply WRED and WFQ to the same class policy.
You also cannot apply WRED and PQ, CQ, or WFQ to an interface.
What are the main purposed for traffic policing?
– To limit the traffic rate to a value less than the physical access rate. – To limit the traffic rate for each traffic class – To re-mark traffic
What are the main purposed for traffic shaping?
– To slow down the rate of traffic being sent to another site through a WAN service such as Frame Relay or ATM. – To comply with the subscribed rate – To send different traffic classes at different rates
In which direction is traffic shaping and traffic policing applied on an interface?
Policing can be applied to the inbound and outbound traffic, but traffic shaping applies only to outbound traffic