What is class based weighted fair queuing?
What is class based weighted fair queuing?
Class Based Weighted Fair queuing is an advanced form of WFQ that supports user defined traffic classes i.e. one can define traffic classes based on match criteria like protocols, access control lists (ACLs), and input interfaces.
How does weighted fair Queueing work?
Weighted Fair Queuing (WFQ Scheme): Here, the packets are grouped into various queues. A weight is assigned to each queue which determines the fraction of the total bandwidth available to the queue. The weight may depend on both channel quality and the number of packets in the queue of individual users.
What is Llq in networking?
Low-latency queuing (LLQ) is a feature developed by Cisco to bring strict priority queuing (PQ) to class-based weighted fair queuing (CBWFQ). LLQ allows delay-sensitive data (such as voice) to be given preferential treatment over other traffic by letting the data to be dequeued and sent first.
What is difference between Round Robin and Weighted Fair Queue?
While WRR serves every non-empty queue, DWRR serves packets at the head of every non-empty queue whose deficit counter is greater than the size of the packet at the head of the queue.
What is packet by packet fair Queueing system?
Weighted fair queueing (WFQ) is a network scheduling algorithm. Weighted fair queuing is also known as packet-by-packet GPS (PGPS or P-GPS) since it approximates generalized processor sharing “to within one packet transmission time, regardless of the arrival patterns.”
What does the FIFO queuing stands for?
first-in, first-out
A FIFO queue is a queue that operates on a first-in, first-out (FIFO) principle. This means that the request (like a customer in a store or a print job sent to a printer) is processed in the order in which it arrives.
What is weighted round robin balancing?
The weighted round robin load balancing algorithm allows site administrators to assign weights to each server based on criteria like traffic-handling capacity. Servers with higher weights receive a higher proportion of client requests.
What QoS tools?
What is QoS? QoS (Quality of Service) refers to all such mechanisms or tools ensuring critical applications requiring real-time data (usually audio or video) get sufficient dedicated bandwidth, with priority over other applications.
What is class based weighted fair queuing (WFQ)?
Class Based Weighted Fair queuing is an advanced form of WFQ that supports user defined traffic classes i.e. one can define traffic classes based on match criteria like protocols, access control lists (ACLs), and input interfaces. A flow satisfying the match criteria for a class contributes the traffic for that particular defined class.
How do you define traffic classes in CBWFQ?
For CBWFQ, you define traffic classes based on match criteria including protocols, access control lists (ACLs), and input interfaces. Packets satisfying the match criteria for a class constitute the traffic for that class. A queue is reserved for each class, and traffic belonging to a class is directed to the queue for that class.
What is fair queuing and how does it work?
Fair queuing provides a straightforward strategy for dividing bandwidth among multiple senders according to preset percentages. Also introduced here is the token-bucket mechanism, which can be used for traffic scheduling but also for traffic description.
What is the difference between fair queue and flow classified traffic?
If a default class is configured with the fair-queue command, all unclassified traffic is flow classified and given best-effort treatment. If no default class is configured, then by default the traffic that does not match any of the configured classes is flow classified and given best-effort treatment.
