ii
Configuration example for NTP broadcast mode with authentication ····································································· 45
Configuration example for MPLS VPN time synchronization in client/server mode ·············································· 48
Configuration example for MPLS VPN time synchronization in symmetric active/passive mode ························· 49
Configuring SNTP ······················································································································································ 52
Configuration restrictions and guidelines ···················································································································· 52
Configuration task list ···················································································································································· 52
Enabling the SNTP service ············································································································································ 52
Specifying an NTP server for the device ····················································································································· 52
Configuring SNTP authentication ································································································································· 53
Displaying and maintaining SNTP ······························································································································· 54
SNTP configuration example ········································································································································ 54
Configuring PTP ·························································································································································· 56
Overview ········································································································································································· 56
Basic concepts ······················································································································································· 56
Synchronization mechanism ································································································································· 58
Protocols and standards ······································································································································· 61
Configuring clock nodes ··············································································································································· 61
Configuration task list ··········································································································································· 61
Specifying a PTP standard ···································································································································· 62
Specifying the clock node type ···························································································································· 62
Specifying a PTP domain ······································································································································ 63
Configuring an OC to operate as only a member clock ·················································································· 63
Configuring the role of a PTP port ······················································································································· 63
Configuring the mode for carrying timestamps ·································································································· 64
Specifying a delay measurement mechanism for a BC or OC ········································································ 64
Configuring the port type for a TC+OC ············································································································· 65
Configuring the interval for sending announce messages ················································································ 65
Specifying the number of announcement intervals before the receiving node stops receiving announce
messages ································································································································································ 66

Configuring the interval for sending Pdelay_Req messages ············································································· 66
Configuring the interval for sending Sync messages ························································································ 66
Configuring the minimum interval for sending Delay_Req messages ······························································ 67
Configuring the MAC address for non-pdelay messages ················································································· 67
Specifying the protocol for encapsulating PTP messages as UDP (IPv4) ························································· 68
Specifying the source IP address for UDP packets····························································································· 68
Configuring the delay correction value··············································································································· 68
Configuring the cumulative offset between the UTC and TAI ··········································································· 69
Configuring the correction date of the UTC ······································································································· 69
Configuring the parameters of the Bits clock······································································································ 69
Configuring a priority of the clock ······················································································································ 70
Specifying the system time source as PTP ··········································································································· 70
Enabling PTP on a port ········································································································································· 70
Displaying and maintaining PTP ··································································································································· 71
PTP configuration example (IEEE 1588 Version 2) ···································································································· 71
PTP configuration example (IEEE 802.1AS) ················································································································ 73
Configuring the information center ··························································································································· 77
Overview ········································································································································································· 77
Log types ································································································································································ 77
Log levels ································································································································································ 77
Log destinations ····················································································································································· 78
Default output rules for logs ·································································································································· 78
Default output rules for diagnostic logs ··············································································································· 78
Default output rules for security logs ··················································································································· 79
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