3Com CoreBuilder 7000, Management Manual

Page: 168 / 516

168 C
HAPTER
7: C
ONFIGURING
V
IRTUAL
C
HANNELS
Call Contract Parameters
When you request call parameter information about a specific call, the
call contract information is also displayed. The information displayed
depends on the service category of the call. The UBR service category is
the one used with LAN emulation; you see it most often in the
CoreBuilder 7000 family switch. For more information about traffic
contracts, see “Call Admission Control” on page 117 in the Operations
Guide. Also, “Display CAC Parameters” on page 219 to display the Call
Admission Control parameters for the switch.
Table 24 shows the call contract parameters displayed for a call with
service category UBR. These are the only parameters relevant to the UBR
service category.
Table 25 shows the call contract parameters displayed for a call with
service category CBR.
Table 24
UBR Call Contract Parameters
Name Description
Best effort Yes–This is UBR service category
No–This is not UBR service category
Frame discard *
* relevant to UNI 4.0, PNNI only
Yes–Perform frame discard
No–Don’t perform frame discard
Table 25
CBR Call Contract Parameters
Name Description Units
PCR 0 Peak Cell Rate for Cell Loss Priority 0 cell/sec
PCR 0+1 Peak Cell Rate for Cell Loss Priority 0+1 cell/sec
SCR 0 Sustainable Cell Rate for Cell Loss
Priority 0 cell/sec
SCR 0+1 Sustainable Cell Rate for Cell Loss
Priority 0+1 cell/sec
MBS 0 Maximum Burst Size for Cell Loss
Priority 0 cell/sec
MBS 0+1 Maximum Burst Size for Cell Loss
Priority 0+1 cell/sec
Best effort Yes–This is UBR service category
No–This is not UBR service category
Frame discard * Yes–Perform frame discard
No–Don’t perform frame discard