Fundamentals of QoS

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Fundamentals of QoS
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This video is a replay of Kevin's recent live webinar that covered the fundamentals of Quality of Service (QoS). If you missed it, or want to see it again, here's a replay.
Topics covered include:
- Learn QoS Mechanisms
- Understand QoS Markings
- Demystify Weighted RED
- Select Appropriate Queuing
- Explain the "Token Bucket"
- Configure QoS using MQC
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Fundamentals of QoS
• Fundamentals of QoS
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Опубликовано:

7 сен 2024

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Комментарии : 112

@b5a5m5 4 года назад

3:15 - Agenda and brief summary of subjects 10:40 - Super quick Bio 12:20 - Fundamentals of QoS 12:28 - Three categories of QoS 19:00 - Common QoS Mechanisms 19:29 - Classification & Marking 22:56 - Queueing 27:47 - Congestion Avoidance 33:31 - Traffic Conditioners (policing and shaping) 35:40 - Link efficiency (link fragmentation and interleaving, rtp header compression) 46:46 - QoS markings 47:03 - CoS class of service L2 marking 50:30 - ToS Type of Service L3 marking 51:58 - DSCP 1:06:50 - Weighted RED 1:12:35 - ECN Explicit Congestion Notification 1:14:45 - CB-WFQ VS LLQ - Understand QoS Markings - Demystifying weighted red - Select appropriate queueing - Explain the token bucket - Configure QoS using MQC To be continued...

@andybrambles782 Год назад

way to finish it bud

@feedbrain6257 6 лет назад

From any given AF value, to have the decimal value, multiply the IP precedence *8 then, Drop Probabilty *2. Then Add both of them. ie AF43 = (4*8) + (3*2) = 32+6 = 38:)

@vincentpatrick5780 3 года назад

You are an absolutely phenomenal teacher! I love the mix of metaphors, practical applications, and theory you use to teach a concept... the combo of all three really makes the concepts stick in the mind. Keep up the great work!

@samcolton943 3 года назад

Amazing video Kevin. When I was in my college cisco classes, we briefly skimmed over QoS, and I'll admit that it absolutely bored me out of my mind. This had my full attention throughout the entire video, and I can't believe how easy you made it with your explanations and examples. Thank you so much!

@abhishekshah11 4 года назад

You are one of the best teachers on QoS. Thanks

@LuiggiAlexander Год назад

Wow, this topic is really large but you summarize it in just 2 hours!!!

@ManisaXLV 6 лет назад

Best explanation I’ve watched by now. Thanks Kevin.

@FerdAboubakrOnline 3 года назад

Finally a REAL qos guide/explanation , thank you for sharing with us ❤️

@sirmontecristo2808 4 года назад

In networking, the airport analogy is what I always use for anything. QoS, Security, Routing, even packet size! :)

@TechMaster011 5 лет назад

Hahahahhahahaahaha the best instructor i have ever heard so far. The way he simplifies everything iyooo !! Amazing

@rendog311rendog2 5 лет назад

any why laughing?

@cawaboonga85 4 года назад

@@rendog311rendog2 Sometimes when we don't understand a topic and someone comes along and make this very digestible and easy to understand, we laugh at ourselves about how we suck at self teaching or understand some complex topic, and Mr. Kevin comes along and says: here it is, stop crying and learn! and we laugh for the imcompetentness we have at understanding certain @topic, @idea... etc. I think that's why Lennon is "laughing" BR,

@rendog311rendog2 4 года назад

AlexKhan okeiii

@MuhammadKhan-yl7mt 11 месяцев назад

Amazingly explained expertly but with simplicity..

@hcetc 5 лет назад

Great explanation on QoS terminologies and what they actually do. I wish I had seen this video earlier. Thanks Kevin!

@binustephen549 6 лет назад

your explanation is very clear and professional way, thank you very much

@Rachid.Mechakra 5 лет назад

Hi kevin, thank you from sharing this golden area (QoS area) with us

@kwallaceccie 5 лет назад

You're very welcome! I'm glad you enjoyed the video.

@gainersmode 16 дней назад

01:01:59: Telnet will get dropped , there is concept called COS-DSCP and DSCP to COS mappings and asscoaited configurations on QOS. Overall the session was very informative

@Rivnarnsec06 3 года назад

One of the best QOS explanation

@micham96 6 лет назад

Thanks for the video Kevin! you provide one of the best learningresources for collaboration

@Shumbaroarmedia 3 года назад

Always top notch content from Kevin.

@aldrichuy983 6 лет назад

Kevin, thanks. Now I know how to manage QoS. It is closely similar to CPU scheduling. Thank you so much. Now I can save the bandwidth of my client's network congestion.

@ynnivtaf 5 лет назад

Thank you Kevin. Great presentation. Really liked the Airline analogy.

@kwallaceccie 5 лет назад

You're very welcome, and I'm glad you enjoyed the video.

@jameschristley9424 4 года назад

Fantastic video - really well explained with examples and at a good pace to follow along to. Coming into this with no knowledge of QoS - it has really helped to make me understand the concepts. Thank you!

@kstatinet-wk2gh 4 года назад

good lecture. the only thing strange is the pronunciation of classes (sounds like claises). it would have been great if he covered Types of Policers from ccnp 350-401 exam (single rate 2 color, two-rate 3 colors)

@denisdm91 3 года назад

I have a question. if there's a topology with N switch and 1 router (firewall) for the connection to the internet if I want to prioritize the voip traffic should I use dscp to mark the traffic and configure it inbound on all the switch interface and in other switches? when the traffic has to go out on the internet is it privileged also outgoing when it crosses the firewall?

@BeeBumper 3 года назад

So to use the soupnazi analogy, he would be more akin to a Policer than a shaper due to his harshness of punishment. He refuses you service, drops you in effect. But shaping is more like, okay go to the back of the line for your infraction and I will call on you when I have the means to deal with your request. I say back of the line but it is queued, it fit with the concept of soupnazi

@melulekinkomazana4166 2 года назад

I eventually understood QoS, thank you a lot.

@luciasmoore2705 6 лет назад

Thanks Kevin, always educational and professional listening.

@raviravi04 3 года назад

Thank you Kevin for the explanation with Examples.

@MrRaxye 6 лет назад

As most people said,that was outstanding job,congratulations

@aliabdaon5502 3 года назад

You are my HERO now I work as a NOC engineer and the thanks was up to you, is there any new course that can we buy regarding CCNP SP the new course

@occamsrazor1285 6 лет назад

AKA the method by which ISPs will create those "fast lanes" now that Title 2 has been repealed, which prevented them from taking "a bribe" from larger corporations and allowing their traffic to jump to the head of the line.

@alvaroluismartinez8759 6 лет назад

Thanks Kevin for sharing this great video with us. It is really helpful.

@silfrancissoriano7277 6 лет назад

Alvaro Luis Martinez I loose p

@silfrancissoriano7277 6 лет назад

Agreed

@kimberly3052 4 года назад

This cleared up alot for me, thanks Kevin!

@kwallaceccie 4 года назад

You’re very welcome! I’m glad you enjoyed the training.

@remcokersten1174 2 года назад

Wauw! Amazing lecture. Thank you Kevin!

@oleggorenkov 3 года назад

With the probability of a drop, everything is clear. What is the role of a Сlass in the AF table? Does the Class matter in WRR, CQ, WFQ, CBWFQ and Drop Probability in congestion avoidance mechanisms?

@paramforaccounts Год назад

Awesome!! Thanks Kevin

@user-ss5fk7bc4z 2 года назад

Thank you Kevin for this well explained video. My question is what is the difference between RSVP and Class Based WFQ?

@bluebear6313 2 года назад

RSVP reserves bandwidth end-to-end, even if it doesn't use the data. It is wasteful but the delivery is guaranteed. Similar to how old telephone calls, only you had the line. CB-WFQ is per packet at each interface, every interface can also have different rules. For example your router could prioritise voice, MPLS would also prioritise it if agreed with your provider. However the internet would ignore is and send it first in first out.

@VandersonT_ 6 лет назад

You are my hero Kevin. Love your teaching skills hahaha

@tiffanyvasquez3174 2 года назад

Thank you!

@mafuyusato5151 5 лет назад

I'm only managing our home network, I want to try assigning equal amounts of bandwidth or traffic per device. Is WFQ the right option to select?

@blissfulsoundsofnature5143 2 года назад

I still don’t understand the binary calculation behind AF43

@redForever1776 2 года назад

how did he calculate latency 1500 byte packet over 56k ?

@chits006 4 года назад

Thanks for the video, I have a question how the probability get calculated for CS1-CS7 code points?

@aminemoulay4490 3 года назад

great explanation , thank you

@marcelbeckeherm6298 4 года назад

Really Nice video, thanks for that Kevin

@bmellis1984 6 лет назад

Thanks for the Video Kevin.

@bharpursingh 6 лет назад

Hey Kevin!! Great Work i really enjoyed your webinar but i am not a networking guy. What i am looking for is Quality of Service in Cloud Computing can you please make a webinar on that, it will really help me with my Research.Waiting for your reply avidly...

@fvillarruel 4 года назад

Dude, this is great. Thanks.

@Anousa86 6 лет назад

the best video ever, thank you very much.

@maged4087 2 года назад

Can you explain the XCP ?

@daniell.6463 3 года назад

Skip to 3:20 if you want to go directly to the start of the presentation.

@makharsa12 6 лет назад

One awesome webinar ..

@oseexplica2807 2 года назад

Tks Bro!

@lell1921 5 лет назад

Hello Kevin, I find this a great video, thanks for sharing this video with us. I have a question, what is your view on the whole point of having different classes with the dscp values if in the end the right most bits are only being looked at for the drop probability? what do classes 1 to 4 differ from each other?

@lell1921 5 лет назад

@@kwallaceccie Great explanation Kevin, thanks!

@kostikakoti5585 2 года назад

Hello Kevin, I find this a great video, thanks for sharing this video with us. I have a question please. How can i limit the overall bandwidth on my client vlan interface witch is connected on cisco nexus 3064 ?

@refaiabdeen5943 2 года назад

Cheers Mate.

@shaneyh97 6 лет назад

doesnt the destination device increase the window size for the sender to send packets ?

@davidshirk9052 5 лет назад

I could be rusty, but isn't TOS bit 6 used for internet control?

@richardgosling2427 3 года назад

What happens if you shape at line rate?

@iaa6662 3 года назад

great Teacher

@jandilkhan 6 лет назад

Awesome! Thank you Sir..! I really appreciate and it was very helpful video

@Annihilus187 5 лет назад

Can you tell me whether or not QOS impacts LAN as well or only WiFi? I want to prioritize my WiFi to my PS4, but I also have two PC's that I don't want to slow down because of the allocation to the PS4. I have a netgear nighthawk 500. Thanks.

@satvisionsatvision 5 лет назад

What a great video, thankyou

@seanyiu 6 лет назад

Good job ! Btw, you do a pretty good Shatner impersonation:-)

@othernamen 3 года назад

Thank you Sir!

@maliknedjm3187 4 года назад

Thank you.

@manuelvillapudua460 4 года назад

Is there documentation from Cisco specifying that we should only have 11 different classes of traffic?

@oleggorenkov 3 года назад

RFC791 IPP(3bits i.e. 8)+3bits(Delay+Throuput+Reliability)

@butchsapida 6 лет назад

Hi Kevin, thanks for sharing your video. I do have a quick question. on VoIP, this is only for Voice. May I ask how Video will be handled in QoS? I mean should it be the same class as the Voice? I will appreciate your clarification and advice on this matter.

@gd2860 6 лет назад

Can you please do a route map video? Thanks

@mariomatejka 6 лет назад

@ 1:19:35 In times of congestion how does the remaining bandwidth gets distributed between the queues once minimums are satisfied. In your example, pretend that Call Signaling, Network Control and Bulk Data are asking for 2 Mbps, while there is no Critical Data being sent at this time. Once the required 1 Mbps of bandwidth is is allocated between the three, will the remainder of the traffic be distributed evenly?

@mariomatejka 6 лет назад

I got one more ask for you. I recently came across Multi-Level Priority Queues. I would love to see a video from you explaining this newer QoS feature.

@EightCounts 4 года назад

training begins at 12:30

@BrunoAH 5 лет назад

very well explained! tks!!!!

@lkdipeolu 3 года назад

Kelvin, you have been very useful and impactful with these video. I’m proud of you.

@balasankarnagarajan9238 6 лет назад

Hi Mr.Kevin , Is QoS comes under CCNA Syllabus???

@crochfarl9804 6 лет назад

Hi Kevin, I was just wondering, at 1:13:29 the Bit Combination of 01 is said to be ECN capable but not experiencing congestion, the same as 11. (within the table in the bottom left) However I thought that 01 combination should be ECN in-capable, but experiencing congestion as the first bit (ECT) is 0, indicating it is not ECN capable, and the second bit (CE) is 1 meaning that congestion is experienced? This bit has left me a little confused and was wondering if you could help me out a little bit?

@crochfarl9804 6 лет назад

Thanks for the quick reply, very useful thank you

@aspirine01 5 лет назад

@@crochfarl9804 hey, im not seeing the reply. what was it? thx in advance

@markokranjcevic7795 2 года назад

all good, but how can a gaming traffic be lower priority traffic ????????????!?!?!?!?1?!!?1

@christhanchacon6888 4 года назад

Fantastic

@abdu2s Год назад

I’m sorry why is he saying “claysses” instead of classes It honestly took me 2 minutes to figure out what he meant

@jaysonmiraflor 2 года назад

@1:29:28 cisco config sample

@MDAFZAALKHAN 4 года назад

Can anybody answer what are 11 different classes of traffic used here??

@oleggorenkov 3 года назад

RFC791 IPP(3bits i.e. 8)+3bits(Delay+Throuput+Reliability)

@lothar8077 5 лет назад

bane width

@coolowenrag 5 лет назад

Hello Kevin, Will it be possible to share the PDF/Powerpoint file of this presentation?

@ZaxMan3D 5 лет назад

so if I understand this right DiffServ is the one to use if all I'm looking for is a QoS to limit how much a given user can use of the bandwidth say I got 100mbit and I don't want any user to be able to use more than 50mbit

@Taurus.x85 6 лет назад

Thanks for this great Video

@kaanpiyano1 2 года назад

you are a network god LoL

@jonathanpatry 6 лет назад

Hello Kevin, quick question about your streams. I always seem to see them a month late! I'm doing my CCNA at the moment and I look up the subjects as I have to in class so the timing will never be there. I just subscribed as this is insanely useful and I'd like to be able to watch a live stream and benefit of those gifts sometime *wink wink* Are the live stream directly on RU-vid or somewhere else like Twitch? Thanks!