Configuring Atm Interface Parameters; Plcp/Direct Mapping - Alcatel-Lucent 7750 SR OS Interface Configuration Manual

Configuring ATM Interface Parameters

ATM interface parameters can only be configured for SONET/SDH ports/paths and TDM ports/
channels supporting ATM encapsulation, and for IMA multilink bundles.
ATM interface parameters allow users to configure characteristics of an ATM interface. The 7750
SR product family supports configuration of the following ATM interface characteristics:
•
•
•
•

PLCP/Direct Mapping

Setting mapping to PLCP changes the effective speed of a DS3 interface to 40.704 M. When a port
operates in a PLCP mode, the OCD events and LCD are not applicable (including related status
fields and counters).
Similarly the below-defined PLCP statuses, alarms, counters do not apply for direct mapped ports.
When a path operates in the PLCP mode, 7750 SR supports the standard ATM MIB monitoring of
the PLCP operations, for example:
•
•
•
Table 28
status and PLCP Alarm state interact:
7750 SR OS Interface Configuration Guide
Cell-format — Allows user to select the ATM cell format to be used on a given interface:
UNI/NNI
ILMI — Allows user to enable/disable ILMI protocol
Traffic-desc — Allows user to configure ILMI PVCC TM characteristics over a given
ATM interface ingress and egress direction characteristics can be configured separately)
Mapping — Allows user to select ATM cell mapping into an HDLC frame: Direct/PLCP
PLCP severely errored framing seconds
PLCP alarm state
PLCP unavailable seconds counter
illustrates how SONET alarm status, path operational status, ATM interface and PLCP
Interface Configuration
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