Configure DSL interfaces
Digi TransPort User Guide 220
PVC Traffic Shaping parameters
Service category
You can configure Each ATM PVC 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 characterized by the various traffic parameters as follows:
This parameter specifies 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
Service category Traffic parameters
UBR PCR, which may be zero for no limit
VBR-nrt PCR, SCR, MBS
VBR-rt PCR, SCR, MBS
CBR PCR
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)
To Next Page
Loading...
