Alcatel-Lucent OmniSwitch 6850-48 Cli Reference Manual page 1478

ip isis graceful-restart helper
ip isis lsp-lifetime
ip isis strict-adjacency-check
page 24-56
Administratively enables and disables the IS-IS router to operate in the
helper mode in response to a router performing a graceful restart.
Configures the time interval for which Link State PDUs generated by a
router are considered valid by other routers in the same domain.
Enables or disables the adjacency check configuration on the router.
OmniSwitch CLI Reference Guide
IS-IS Commands
June 2012