VLL Service Configuration Commands
Page 390 7750 SR OS Services Guide
OAM Commands
oam
Syntax oam
Context config>service>epipe>sap
config>service>apipe>sap>atm
Description This command enables the context to configure OAM functionality for a PVCC delimiting a SAP.
• The ATM-capable MDAs support end-to-end and segment OAM functionality (AIS, RDI, Loop-
back) over both F5 (VC) and end-to-end F4 (VP) OAM:
• ITU-T Recommendation I.610 - B-ISDN Operation and Maintenance version 11/95
• GR-1248-CORE - Generic Requirements for Operations of ATM N3 June 1996
• GR-1113-CORE - Bellcore, Asynchronous Transfer Mode (ATM) (AAL) Protocols Generic
Requirements, Issue 1, July 1994
alarm-cells
Syntax [no] alarm-cells
Context config>service>epipe>sap>oam
config>service>epipe>sap>oam
config>service>apipe>sap>atm>oam
Description This command configures AIS/RDI fault management on a PVCC. Fault management allows PVCC
terminations to monitor and report the status of their connection by propagating fault information
through the network and by driving PVCC’s operational status.
When alarm-cells functionality is enabled, a PVCC’s operational status is affected when a PVCC goes
into an AIS or RDI state because of an AIS/RDI processing (assuming nothing else affects PVCC’s
operational status, for example, if the PVCC goes DOWN, or enters a fault state and comes back UP,
or exits that fault state). RDI cells are generated when PVCC is operationally DOWN. No OAM-
specific SNMP trap is raised whenever an endpoint enters/exits an AIS or RDI state, however, if as
result of an OAM state change, the PVCC changes operational status, then a trap is expected from an
entity the PVCC is associated with (for example a SAP).
The no command disables alarm-cells functionality for a PVCC. When alarm-cells functionality is
disabled, a PVCC’s operational status is no longer affected by a PVCC’s OAM state changes due to
AIS/RDI processing (Note that when alarm-cells is disabled, a PVCC will change operational status
to UP due to alarm-cell processing) and RDI cells are not generated as result of the PVCC going into
AIS or RDI state. The PVCC’s OAM status, however, will record OAM faults as described above.
Default Enabled for PVCCs delimiting IES SAPs
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