Alcatel-Lucent 7750 SR Manual page 1136

VPRN Services Command Reference
NTP Commands
Note that the ntp-server command is not supported in the vprn>ntp context. Then NTP is
configured in a VPRN service, the NTP server mode is assumed and is not optional.
config
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— service
— vprn
— [no] ntp
— [no] authentication-check
— authentication-key key-id key key [hash | hash2] type {des | message-
digest}
— no authentication-key
— [no] broadcast [router router-name] {interface ip-int-name} [key-id
key-id] [version version] [ttl ttl]
key-id
7750 SR OS Services Guide