Configuring Virtual Circuits
177
If you select Config. 2, the following occurs:
n
For CBR traffic, CLP=0+1 cells are policed and non-conforming cells are
dropped. The policing for CBR traffic is based on PCR and CDVT.
n
For non-CBR traffic, CLP=0 cells are policed and SCR is enforced such that
non-conforming CLP=0 cells are tagged. Additionally, CLP=1 cells are policed
and PCR is enforced such that non-conforming CLP=1 cells are discarded. The
policing for non-CBR traffic is based on PCR, SCR, and MBS.
PCR/CDVT/SCR/MBS—
Set the policing parameters.
PCR
—Peak Cell Rate; the maximum cell rate which the source may never
exceed. This is the interval from the first bit of one cell to the first bit of the
next cell.
CDVT
—Cell Delay Variation Tolerance; the acceptable tolerance of CDV. CDV is
a Quality of Service parameter that measures the peak-to-peak cell delay
through the network. It represents the difference between the worst case delay
and the best case delay achievable on the VC.
SCR
—Sustainable Cell Rate—the maximum average rate (in cells/sec) that a
bursty on-off traffic source that can be sent at the peak rate.
MBS
—Maximum Burst Size;
t
he maximum number of cells that can be sent at
the peak rate.
Ethernet Card Virtual Circuit Configuration Parameters
You build connections from the local Ethernet port to a remote Ethernet port by
adding Permanent Virtual Circuits (PVCs). These connections allow the packets to
be transmitted through the ATM network to the destination port.
Shaper
—Select one of the 15 Shaper values that you configured under
Manage
Card
. You assign the
Shaper
value to ensure adequate traffic flow to and through
the ATM WAN. The
Shaper
parameter is key in ensuring that your traffic does not
exceed the negotiated traffic contract as administered by the service department
or IS department.
CBR Card Virtual Circuit Configuration Parameters
You set up an emulated circuit connection from the CBR DSX or CBR E1 port to a
remote CBR DSX or CBR E1 port by mapping DS1 circuits to permanent virtual
circuits (PVCs). These circuits are then transmitted through the ATM network to
the destination port.
Mode
—Normal (normal PVC mode) or Auto (auto-detect mode). In auto-detect
mode, the CBR card monitors the Rx traffic activity to activate or de-activate the
PVC. Auto-detect mode is typically used in RS-366 video sessions to support
dynamic bandwidth allocation (DBA).
CDV Buffer size
—The Cell Delay Variation for the provisioned CBR circuit as
indicated by the network (carrier) or external test measurement:
1-24 ms
.
Cell Loss Integration Period
—The amount of time the system will wait before
declaring cell loss state:
2000-65535 ms
.
Payload Size Type
—Select
data
or
voice
. Select
voice
to configure for dynamic
bandwidth allocation (DBA).
Summary of Contents for 3C63100-AC-C - PathBuilder S600...
Page 8: ...INDEX 3COM CORPORATION LIMITED WARRANTY ...
Page 14: ...xiv CHAPTER SUPPLEMENTARY REGULATORY INFORMATION ...
Page 18: ...18 ABOUT THIS GUIDE ...
Page 28: ...28 CHAPTER 1 SYSTEM DESCRIPTION ...
Page 74: ...74 CHAPTER 3 GETTING STARTED ...
Page 230: ...230 INDEX ...
