Juniper IGP - CONFIGURATION GUIDE V11.1.X, Configuration Manual

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Use to specify conditions under which the OSPFv2 or OSPFv3 router abandons
its role as an OSPF graceful restart helper router.
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Use the any keyword to abandon the helper role when any LSA changes during
the restart. Use the non-externals keyword to abandon the helper role only
when any nonexternal LSA changes during the restart.
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Example
host1(config-router)# graceful-restart helper-abort-topology-change any
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Use the no version to return the router to its default behavior of helping a
restarting OSPF router during topology changes.
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See graceful-restart helper-abort-topology-change
graceful-restart notify-time
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Use to specify the time (in the range 1–3600 seconds) expected for the OSPFv2
or OSPFv3 router to remove grace LSAs over all interfaces.
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The restarting router sends the sum of the restart duration and notify duration
as the
grace period to the helping neighbors in the grace LSA. Receiving a
maximum-aged grace LSA is an indication to the helper that the restart has been
successfully completed on the restarting router.
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If the grace period on the helper router expires before the receipt of max-aged
grace LSAs, the helper router stops the restart process and does not respond to
the restarting router. The helper router then originates its own LSAs with the real
current state of the adjacency with the restarting router reflected in them.
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Example
host1(config-router)# graceful-restart notify-time 500
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Use the no version to return the notify duration to its default value, 15 seconds.
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See graceful-restart notify-time
graceful-restart restart-time
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Use to specify the time (in the range 1–3600 seconds) expected for the OSPFv2
or OSPFv3 router to reacquire OSPF neighbors that were fully operational prior
to the restart.
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When this timer expires, the restarting router exits the restart procedure,
originates any LSAs that were suppressed during the restart, removes any
self-originated LSAs that it received from helping neighbors, runs SPF, and updates
any routes in the routing table.
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Example
host1(config-router)# graceful-restart restart-time 350
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Use the no version to return the restart duration to its default value, 180 seconds.
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See graceful-restart restart-time
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Configuring OSPF Graceful Restart
JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide