The MPLS WG Archive

[Robert Raszuk <raszuk@cisco.com>]

Maks,

> I would like to ask about differences in IP QoS models implemented in
> MPLS: do they only differ in granularity? When it is recommended to use
> the former and when the latter? Does the type of hardware (ATM-LSRs, IP
> routers) have any influence on this choice?

I am not aware that anybody is using intserv in the SP/ISP type of
network. It simply does not scale.

> And one question regarding diffserv only: does the setting up of
> packet's DSCP value in domain boundary mean that this packet will be
> treated in the same way in all nodes of the domain?

It depends of the configuration of each node and does not have anything
to do specifically with MPLS. MPLS header is just a vehicle to carry the
EXP bits. In DS-TE the middle nodes diffserv scheduling configuration
can be automated via RSVP so you can assume that for such a flows the
answer would be yes.

R.

> Maksymilian Milkowski wrote:
> 
> Hi,
> I would like to ask about differences in IP QoS models implemented in
> MPLS: do they only differ in granularity? When it is recommended to use
> the former and when the latter? Does the type of hardware (ATM-LSRs, IP
> routers) have any influence on this choice?
> And one question regarding diffserv only: does the setting up of
> packet's DSCP value in domain boundary mean that this packet will be
> treated in the same way in all nodes of the domain?
> 
> Thanks in advance,
> 
> Maks Milkowski