Cisco BPX 8650, Installation And Configuration Manual

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 21 Configuring ATM Connections
ATM Connection Configuration
Figure 21-10 ABR ForeSight Connection Prompt Sequence
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 21-14.
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)
At present, FCES is not available for ABR with ForeSight
For policing prompt:
1 = VBR.1
2 = VBR.2
3 = VBR.3
4 = PCR policing only
5 = policing off
Note: Bandwidth allocation
= (MCR)x(%Util)
10227
Enabled
Default values used
for: SCR, MBS, etc.
Disabled
(Configure
following
parameters)
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)
1
2
2
1
Trunk cell routing
restrict (Y/N) [Y]