QoS_Megis.pdf

MikroTik RouterOS Workshop

QoS Best Practice

Prague

MUM Czech Republic 2009

Questions and Answers

Q: Is it possible to prioritize traffic by type for

every single client while having strict per-user

limitations on the same router?

A: Yes!

Q: What will I need to achieve that?

A: You will need:

1)Packet Flow Diagram 2)HTB (queue tree),

3)Mangle, 4)PCQ, 5)Address List

Mangle

The mangle facility allows you to mark IP

packets with special marks.

These marks are used by other router facilities

like routing and bandwidth management to

identify the packets.

Additionally, the mangle facility is used to

modify some fields in the IP header, like TOS

(DSCP) and TTL fields.

Hierarchical Token Bucket

All bandwidth management implementation in

RouterOS is based on Hierarchical Token

Bucket (HTB)

HTB allows you to create hierarchical queue

structure and determine relations between

queues

RouterOS supports 3 virtual HTBs (global-in,

global-total, global-out) and one more just

before every output interface

QoS Packet Flow

This diagram is created from RouterOS Packet

Flow diagram.

http://wiki.mikrotik.com/wiki/Packet_Flow