The MPLS WG Archive

[Erblichs <erblichs@earthlink.net>]

SP,

	OSPFv2, a link state protocol used to have
	support for QOS, but that was never widely
	used.

	One admistrator of a domain may set router
	path costs within that domain based on delay 
	or other metrics.

	If one looks at QOS in a granular way,
	one may set the cost very high with the assumption
	that their is a alternate path with a lower
	summed cost. This would in effectly generate
	a lower loading on the dst paths that are NOT
	transiting this path. Thus, the dst based
	paths would get a higher quality of service.

	However, if you are looking to guarantee a
	service level of service as a load increases
	this won't help.

	Mitchell Erblich
	----------------------
	

SP wrote:
> 
> what routing protocols have what to do with QoS?
> 
> I mean distance vector and link state IGP protocols are just how the
> routers discuss cost of paths and update each others routing tables.
> 
> The main ones used for cisco are IGRP, and EIGRP...
> The QoS is mainly layer 2 to layer 4, with GoS and ToS.
> 
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