Unspecified Bit Rate Connections - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 21 Configuring ATM Connections
Figure 21-10 ABR ForeSight Connection Prompt Sequence
ABRFST
PCR(0+1)
%Util
MCR
CDVT(0+1)
FBTC (Frame based traffic control - AAL5, enable/disable)
FCES (Flow Control External Segment, enable/disable)
Default Extended Parameters (enable/disable)
SCR
MBS
Policing (1, 2, 3, 4, or 5)
VC QDepth
CLP Hi
CLP Lo/EPD
EFCI
ICR
ADTF (same as ICR TO)
Trm (same as Min. Adjust)
RIF (same as Rate up)
RDF (same as Rate down)
At present, FCES is not available for ABR with ForeSight
1
For policing prompt:
2
1 = VBR.1
2 = VBR.2
3 = VBR.3
4 = PCR policing only
5 = policing off
Note: Bandwidth allocation
= (MCR)x(%Util)

Unspecified Bit Rate Connections

The unspecified bit rate (UBR) connection service is similar to the ABR connection service for bursty
data. However, UBR traffic is delivered only when there is spare bandwidth in the network. This is
enforced by setting the CLP bit on UBR traffic when it enters a port.
Therefore, traffic is served out to the network only when no other traffic is waiting to be served first.
The UBR traffic does not affect the trunk loading calculations performed by the switch software.
The parameters for a UBR connection are shown in Figure 21-11 in the sequence in which they occur
during the execution of the addcon command.
The UBR policing definitions are summarized in Table 21-10.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Disabled
(Configure
following
parameters)
Default values used
for: SCR, MBS, etc.
2
1
Enabled
Trunk cell routing
restrict (Y/N) [Y]
Cisco BPX 8600 Series Installation and Configuration
ATM Connection Configuration
21-35