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per-class bandwidth accounting and class-type
Hi! I have some basic questions related to the issue of bandwidth
for diff-serv classes.
I am trying understand, why I need to define a class-type (which is
define some sort of "super' class over standardized diffserv
classes) to solve
the IGP scalability issue.
Can't the problem be solved by user configuration ? For example:
1. User configures LSRs in his domain, with the diff-serv
classes he needs, along with the bandwidth limits for those
2. Advertising the per-class bandwidth information via IGPs
a) If the domain administrator wants to use the most
per-class information to be used by the IGPs in his
(and have enough bandwidth) then
all the per-class bandwidth for all the
defined in the LSR can be advertised.
b) If the domain administrator wants the LSRs to support
diffserv classes he configured in step1 , but wants
reduce the amount of IGP traffic generated to
the per-class bandwidth information then
i) he can configure his domain to advertise
the per-class bandwidth information for a
of the classes he defined in the step1.
information for rest of the classes can be
with the aggregated bandwidth information.
3. Similarly, if wants to define only two pre-emption
in his domain, he can always configure his domain
All these can be defined, by a MIB (or some policy
user has control over what he wants.
Am I missing something ? Your help will be appreciated.