What is pfifo in mikrotik?

PFIFO, BFIFO and MQ PFIFO These queuing disciplines are based on the FIFO algorithm (First-In First-Out). The difference between PFIFO and BFIFO is that one is measured in packets and the other one in bytes. Every packet that cannot be enqueued (if the queue is full), is dropped.

What is Pfifo_fast?

Description. pfifo_fast is the default qdisc of each interface. Whenever an interface is created, the pfifo_fast qdisc is automatically used as a queue. If another qdisc is attached, it preempts the default pfifo_fast, which automatically returns to function when an existing qdisc is detached.

What is a qdisc in Linux?

qdisc. Simply put, a qdisc is a scheduler (Section 3.2). Every output interface needs a scheduler of some kind, and the default scheduler is a FIFO. Other qdiscs available under Linux will rearrange the packets entering the scheduler’s queue in accordance with that scheduler’s rules.

What is Sfq MikroTik?

FIFO – First In First Out (for Bytes or for Packets) RED – Random Early Detect (or Drop) SFQ – Stochastic Fairness Queuing. PCQ – Per Connection Queuing (MikroTik Proprietary) Firewall Mangle and Address-lists.

What is Linux NetEm?

NetEm is an enhancement of the Linux traffic control facilities that allow to add delay, packet loss, duplication and more other characteristics to packets outgoing from a selected network interface.

What is a tc packet?

tc (traffic control) is the user-space utility program used to configure the Linux kernel packet scheduler. Tc is usually packaged as part of the iproute2 package.

What is HTB MikroTik?

HTB (Hierarchical Token Bucket) is a classful queuing method that is useful for handling different kind of traffic. We have to follow three basic steps to create HTB: Match and mark traffic – classify traffic for further use. Consists of one or more matching parameters to select packets for the specific class.

What is the difference between a pfifo and a bfifo?

For a pfifo the unit is understood to be packets and for a bfifo the unit is understood to be bytes. Example 6. Specifying a limit for a packet or byte FIFO

How is the size of the queue defined in FIFO?

Regardless of the type of FIFO used, the size of the queue is defined by the parameter limit. For a pfifo the unit is understood to be packets and for a bfifo the unit is understood to be bytes. Example 6. Specifying a limit for a packet or byte FIFO

What is the FIFO algorithm?

The FIFO algorithm forms the basis for the default qdisc on all Linux network interfaces ( pfifo_fast ). It performs no shaping or rearranging of packets. It simply transmits packets as soon as it can after receiving and queuing them. This is also the qdisc used inside all newly created classes until another qdisc or a class replaces the FIFO.

What is the default SFQ value for flow hash filter?

If you have changed the sfq default of 1024, use the same value for the flow hash filter, too. Example 7. SFQ with optional RED mode Example 8. Creating an SFQ