QoS clarification and deployment

[mrochac]

Good day everyone - i'm working on deploying QoS across our corporation and have a few questions - i'll keep it simple as for layout of network.

 WAN(MPLS) -----(CERouter)----(OurRouter (2901)----(Switch(2960x)----devices (ip phone, desktop,etc..)

CE predefined QoS as follow marking so this is what they are expecting to receive as markings from me, which is fine. 

how do i go about this?

1 - create ACL for all the traffic i want to mark and use policy-map

- if i use ACL wont the deny all at the end of ACL dropped the rest of the traffic?

2 - where do i apply ACL to SVI?phusical?

I been reading tones of info online but i can grasp around how it functions... 

i'm a little confused how this comes together.

Hopefully i make sense...any help is appreciated. tks.

[mkazam001]

Hi,

I think you can only understand QoS properly from the experts, not from the web - as I learnt myself.

I highly recommend this book by Odom Wendell on Cisco QoS, cheap second-hand too!

https://www.amazon.com/Cisco-Certification-Guide-Telephony-Self-Study/dp/1587201240/ref=sr_1_2?ie=UTF8&qid=1541277163&sr=8-2&keywords=cisco+qos

Regards,

Azam

[Georg Pauwen]

Hello,

the ACL just needs to match what you want to prioritize (typically voice and video traffic), anything else goes in the default class.

Since you say your CE has QoS configured, can you find out what exactly is configured ? 

[mrochac]

Hi Georg - here are the markings; this is what they are expecting on their end from me - i guess my confusion is how do mark all this traffic coming in from LAN so that when it goes out WAN port its defined according? I gathered that each int would have an ACL filtering the traffic and classes marking traffic according to policy-map? thanks.

RT

class-map match-any RT

description *** Real Time ***

match ip dscp cs5

match ip dscp ef

VC

class-map match-any VC

description *** Video class***

match ip dscp  cs4  af41  af42  af43

BH

class-map match-any BH

description *** Business High ***

match ip dscp cs3 af31 af32 af33 cs6 cs7

BL

description *** Business Low ***

match ip dscp cs2 af21 af22 af23

BE

description *** Business Enhance ***

match ip dscp cs1 af11 af12 af13

[mrochac]

The markings was provided to me from ISP (WAN).