Cisco BPX 8650, Installation And Configuration Manual

Page: 322 / 606

21-10
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 Flow
ATM Connection Flow
This section describes the ATM connection flow.
ATM Connection Flow through the BPX
The BPX supports the standard ATM service types, CBR, rt-VBR, nrt-VBR, ABR, and UBR. When
adding a connection by using the
addcon command, you select these service types by entering one of
the CLI service type entries listed in Table 21-5 when prompted.
The BPX also supports ATM to Frame Relay Network Interworking and Service Interworking
connections. When adding a connection by using the
addcon command, you select these service types
by entering one of the CLI service type entries described in Table 21-6 when prompted.
Advanced CoS Management
Advanced CoS management provides per-VC queueing and per-VC scheduling. CoS management
provides fairness between connections and firewalls between connections. Firewalls prevent a single
noncompliant connection from affecting the QoS of compliant connections. The noncompliant
connection simply overflows its own buffer.
Table 21-5 Standard ATM Type and addcon
CLI Service Type Entries Connection Description
CBR cell bit rate.
rt-VBR real-time VBR.
nrt-VBR non real-time VBR.
UBR unspecified bit rate.
ABRSTD Determines the ABR per forum standard, with option to enable VS/VD
congestion control.
ABRFST ABR with Cisco ForeSight congestion control.
Table 21-6 ATM to Frame Relay Network and Service Interworking
CLI Service Type Entries
for addcon Command
Connection Description
ATFR ATM to Frame Relay Network Interworking.
ATFST Same as ATFR with ForeSight.
ATFT ATM to Frame Relay Transparent Service Interworking.
ATFTFST Same as ATFT with ForeSight.
ATFX ATM to Frame Relay Translational Service Interworking.
ATFXFST Same as ATFX with ForeSight.