Alcatel-Lucent 7750 SR Manual page 1297

Virtual Private Routed Network Services
periodic-loopback
Syntax [no] periodic-loopback
Context config>service>vprn>if >sap>atm>oam
config>service>vprn>sub-if>grp-if>sap>atm
Description This command enables periodic OAM loopbacks on this SAP. This command is only configurable on
VPRN SAPs. When enabled, an ATM OAM loopback cell is transmitted every period as configured
in the config>system>atm>oam>loopback-period period context.
If a response is not received and consecutive retry-down retries also result in failure, the endpoint will
transition to an alarm indication signal/loss of clock state. Then, an ATM OAM loopback cell will be
transmitted every period as configured in the loopback-period period. If a response is
received for the periodic loopback and consecutive retry-up retries also each receive a response, the
endpoint will transition back to the up state.
The no form of the command sets the value back to the default.
Default
no periodic-loopback
7750 SR OS Services Guide Page 1297