Cell Relay Archive

[anouch_f@my-deja.com]

Hi,

This is a Nortel Passport question but I'm also interested to know how
UBR and UBR+ are differentiated on other platforms.

I was wondering if it is possible to differentiate UBR and UBR+ by
mapping them to different service categories, thus redirecting them to
different Emission Priorities (EP). If possible, we could therefore
allocate an MBG (Minimum Bandwidth Guaranty) to the EP serving UBR+
which will get more bandwidth than the UBR EP with no MBG.

I didn't see anything in the manual saying that it's possible, nor
anything saying that it's not possible. But, the number of EPs supported
(6+2) and the number of Class of Service actually supported (5: CBR,
nrt&rt-VBR, ABR, UBR) suggest that some EPs are left empty. Therefore I
don't see why this could not be technically feasible. It's just a matter
of configuration/semantic check.

While it is possible to differentiate permanent connections WITHIN a
service category by manually overriding their weights in the WFQ
algorithm, it is not possible to do so for the switched connections
(where the weights are calculated from traffic parameters).  Customized
service categories i.e. being able to create new ones, will also remove
this limitation.

Thanks


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