[j-nsp] ATM VC Reserved

[Peter E. Fry]

From: <david.roy at orange-ftgroup.com>
[...]
> hi all,
>  
> I've configured VCI 13 on an ATM interface and now I've
> got this warning :
>  
> commit and-quit
> [edit interfaces at-7/0/0]
>   'unit 4'
>     warning: Warning: vci 13 is reserved - will not
> support in future releases
>  
>  
> Do you know why ?

  IIRC, VPIs 0-1 and VCIs 0-31 are reserved for signalling. 
Most systems allow assignment withing these ranges, but
attaching to a switch with a UNI PVC of 0/16 would be a bit
odd, for instance.  Check out the ATM forum docs (I believe
some may be publicly available).
  As to why Juniper would threaten to do more than drop a
warning about it, it could be an attempt at behavior
modification.  I doubt they have a SAR that doesn't allow
reserved assignments; they may wish to avoid potential
collisions.

Peter E. Fry