Need a Qos entry explained - if you dare!!!

[encarter]

We have this entry in our router

policy-map QOS-SCHEDULER-S
class PREMIUM
priority 512
class ENHANCED
police 1024000 conform-action set-prec-transmit 2 exceed-action set-prec-transmit 0 class ENHANCED-SIGNALING
bandwidth 32
class class-default
set ip precedence 0
fair-queue


maybe break it down, each part.

Thanks,

 

[encarter]

Cisco Guru's....??

 

[lerdalt]

It is just one piece out of your entire QoS Configuration. I'll do my best to explain it.

policy-map QOS-SCHEDULER-S = creates a policy map
class PREMIUM = traffic that matches the class-map PREMIUM
priority 512 = will be placed in the priority queue (guessing this is voice or video traffic) with a rate of 512 kbps.

class ENHANCED = traffic matching the ENHANCED Class map
police 1024000 conform-action set-prec-transmit 2 exceed-action set-prec-transmit 0 = will be policed at 1,024,000 kbps. with packets that are under this cap, will have a the ip precedence value set to 2....if it exceeds that limit, ip precedence will be set to 0

class ENHANCED-SIGNALING = traffic matching the ENHANCED-SIGNALING class-map
bandwidth 32 = 32kbps bandwidth

class class-default = default class...everything that hasn't been classified
set ip precedence 0 = ip precedence set to 0
fair-queue = will use weighted fair queuing.

You should see an outbound service policy statement on one of your interfaces. That is where this policy will then be put into effect.

 

[encarter]

Great i got the jist of most of it already, that Policer line got me a little stuck. but isnt that 1,024,000 bits not kbits?

Yes the PREMIUM is for Voice.
The Enhanced is for Oracle data.

I guess im having a hard time breaking down the percentages.

We have 2 T1's multilinked together.
So thats 3.088 Mbps = 3,088 Kbps

and we are reserving = 512 Kbps - for voice (32 Kpbs for Voice signallig)
and we are reserving = 1,024 Kbps - for Oracle


Would that be fairly accurate??

 

[burtsbees]

Yes---bits, not kilobits.

Burt

 

[lerdalt]

yep..sounds like you got it about right.

You might want to check out these links for extra info:

http://www.cisco.com/en/US/products/ps6558/products_ios_technology_home.html

http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_book09186a0080435d50.html

 

[encarter]

Thank you for all your help people.

The last last link was pretty good however as you all say its not really enough to grasp the concepts. I think im just going to shell out the cash and buy the recommended books.

Thanks Again,

 

[lerdalt]

Here is the book I'd recommend then:

http://www.ciscopress.com/bookstore/product.asp?isbn=1587201240

It's really good at explaining why you need QoS and all the concepts behind it.

 

[encarter]

Someone from a different Forum recommended this book.
As its alot thinner and easier to take in being a new-bee to QoS.

http://www.amazon.com/CCNP-Official-Exam-Certification-Guide/dp/1587201763

Plus the book covers one of the exams for my CCNP?

Thoughts??

 

[lerdalt]

Both would be good. I didn't know any of the ONT material had finally released like that.