MikroTik RouterOS Workshop QoS Best Practice （MikroTik RouterOS车间QoS最佳实践）.pdfVIP

MikroTik RouterOS Workshop QoS Best Practice Prague MUM Czech Republic 2009 © MikroTik 2008 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 © MikroTik 2008 2 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. © MikroTik 2008 3 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 © MikroTik 2008 4 QoS Packet Flo This diagram is created from RouterOS Packet Flow diagram. /wiki/Packet_Flo © MikroTik 2008 5 Double QoS It is possible to mark and shape traffic twice in the same router: Mangle chain Prerouting – for first marking Global-in HTB – for first shaping Mangle chain Forward or Postrouting for second