User`s guide

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Each ATM PVC may now be configured with a service category:
UBR (unspecified bit rate, the default)
VBR-nrt (variable bit rate, non-real-time)
VBR-rt (variable bit rate, real-time)
CBR (constant bit rate)
Additional traffic parameters may be specified:
PCR (peak cell rate in cells/sec)
SCR (sustained cell rate in cells/sec)
MBS (maximum burst size in cells)
The four service categories are characterised by the various traffic parameters as follows:
UBR: PCR, which may be zero for no limit
VBR-nrt: PCR, SCR, MBS
VBR-rt: PCR, SCR, MBS
CBR: PCR
Peak cell rate (cells/sec)
The maximum allowable rate at which cells can be transported along a connection in the
ATM network. The PCR is the determining factor in how often cells are sent in relation to
time in an effort to minimize jitter. PCR generally is coupled with the CDVT (Cell Delay
Variation Tolerance), which indicates how much jitter is allowable
Sustained cell rate (cells/sec)
A calculation of the average allowable, long-term cell transfer rate on a specific connection.
Maximum burst size (cells)
The maximum allowable burst size of cells that can be transmitted contiguously on a
particular connection.
Related CLI Commands
Entity Instance Parameter Values
Equivalent Web
Parameter
apvc 0 servcat UBR,VBR-ntr,VBR-rt,CBR Service category
apvc 0 pcr n
Peak cell rate
(cells/sec)
apvc 0 scr n
Sustained cell rate
(cells/sec)
apvc 0 mbs n
Maximum burst size
(cells)