Packet priority - Diffserv / DSCP / 802.1p

[mattKnight]

Please can someone explain the differences between the 3 (I shoudl know but don't for sure)

802.1p is the IEEE specification, but diffserv is an implementatiion?

More specific - does a switch that supports 802.1p therefore support diffserv?

Manty thanks

Take Care

Matt
If at first you don't succeed, skydiving is not for you.

 

[jimbopalmer]

802.1p is a layer 2 priority scheme (works on all ethernet, not just IP), every time it goes through a router, all priority info is lost. The switches I used only supported it.

Diffserv is a layer 3 scheme. (works in TCP/IP, not just ethernet) The routers I used, used Diffserv to reset the 802.1p priority once it was lost.

I tried to remain child-like, all I acheived was childish.

 

[mainstreetexpress]

And Diffserv is an abbreviated version of Differentiated Services Code Point (DSCP)