QoS Expedited Forwarding (EF) value of 46

jskfan
jskfan used Ask the Experts™
on
QoS Expedited Forwarding (EF) value of 46

Can someone explain the Value 46 of EF  ,where did 46 come from ?

reading online I found this :
 "DSCP 46 is backward compatible with an IP Precedence value of 5 as seen in the following binary pattern: 101110 = DSCP 46 "

Not clear enough though

Any QoS  to elaborate on this ?

Thanks
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Top Expert 2016
Commented:
the assured forwarding (AF) model is used to provide priority values to different data applications. The Expedited Forwarding (EF) model is used to provide resources to latency (delay) sensitive real-time, interactive traffic. The EF model uses one marking -- DSCP 46.
https://www.networkworld.com/article/2234016/the-qos-expedited-forwarding-ef-model.html
SteveArchitect/Designer

Commented:
Although we refer to it as '46' its not meant to be represented as a decimal number. as with many computer explanations, it's all about the binary!

Once its represented as a binary number its easier to explain as @justincase has above.

1 0 1 1 1 0 0 0

Think of them as individual on/off switches that may or may not actually relate to each other.
Any given combination of ons/offs results in the packet being treat in a specific way based on what each switch 'means'

'46' is just the decimal representation of the ons/offs that humans prefer.

Author

Commented:
per this table, it is equivalent of IP Precedence of 5.
https://app.netrounds.com/static/2.24/support/defs-notes/dscp-ipp.html

Author

Commented:
Thank you

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial