Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010, Configuration Manual

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previous keepalive timeout interval). If both sides are configured with keepalive,
receipt of an LCP echo request by one end suppresses the transmission of an
LCP echo request by that end.
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You can specify a timeout value in the range 30–64800 seconds. The default
value is 30 seconds.
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If the keepalive interval is 30 seconds, a failed link is detected between 90 and
120 seconds after failure.
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Use ppp keepalive without a value to restore the default, 30 seconds.
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Example
host1(config-profile)# ppp keepalive 50
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Use the no version to disable keepalive.
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See ppp keepalive.
ppp log
Use to enable PPP packet or state machine logging on any dynamic interface
that uses the profile being configured. Specify one of the following keywords:
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pppPacket —Enables PPP packet logging
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pppStateMachine —Enables PPP state machine logging
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Example
host1(config-profile)# ppp log pppPacket
NOTE: This command is equivalent to the l og severity debug pppPacket and log
severity debug pppStateMachine commands.
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Use the no version to disable packet or state machine logging.
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See ppp log.
ppp magic-number disable
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Use to disable negotiation of the local magic number.
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Issuing this command prevents the router from detecting loopback configurations.
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Example
host1(config-profile)# ppp magic-number disable
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Use the no version to restore negotiation of the local magic number.
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See ppp magic-number disable.
ppp magic-number ignore-mismatch
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Configuring a Dynamic Interface from a Profile
JUNOSe 11.1.x Link Layer Configuration Guide