Beta Draft Confidential
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ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Logical Ports on Frame-based Modules
About ATM Logical Ports
About ATM Logical Ports
The following sections describe the types of logical ports you can configure using
either a B-STDX module or CBX frame-based modules. For an outline of the logical
port types that each module supports, see
ATM UNI DCE
The ATM UNI DCE logical port type configures the logical port to communicate with
an ATM CPE over ATM PVCs. The Lucent switch acts as an access concentrator
feeding multiple FR and/or ATM PVCs to the CPE via the logical port.
ATM UNI DTE
The ATM UNI DTE logical port type configures the logical port to communicate with
an ATM switch over ATM PVCs. The Lucent switch acts as an access concentrator
feeding multiple Frame Relay and/or ATM PVCs to the ATM network via the logical
port.
ATM Direct Trunk/Direct Cell Trunk
An ATM direct cell trunk (“direct trunk”) logical port type supports the transmission
of virtual path connection (VPC) data. Like OPTimum cell trunks, direct trunks have
no Lucent header. A unique VPI/VCI identifies the circuit and controls traffic using a
separate channel. A cell trunk uses a virtual path through the ATM cloud as a channel.
When configuring a direct trunk, no DTE feeder is required. Since the direct trunk
uses all of the physical port’s bandwidth, you can only configure one direct trunk
logical port type on a single physical port; no other logical port types can be
configured on this port.
Direct trunks enable you to create a trunk between either two B-STDX 9000 switches,
or between a CBX 3500/CBX 500 or GX 550 switch and a B-STDX 9000 switch. This
logical port type enables a single open shortest path first (OSPF) routing domain in a
mixed network that includes both B-STDX 9000 or GX 550 switches.
The following modules support direct trunk connections between B-STDX 9000
switches:
•
1-port ATM CS DS3/E3
•
1-port ATM IWU OC-3c/STM-1
•
1-port ATM UNI DS3/E3
Summary of Contents for CBX 3500
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