NTP multicast mode configuration example ················································································································ 94

IPv6 NTP multicast mode configuration example ······································································································· 97

Configuration example for NTP client/server mode with authentication ······························································· 100

Configuration example for NTP broadcast mode with authentication ··································································· 101

Configuration example for MPLS VPN time synchronization in client/server mode ············································ 104

Configuration example for MPLS VPN time synchronization in symmetric active/passive mode ······················· 106

Configuring SNTP ··················································································································································· 108

Configuration restrictions and guidelines ·················································································································· 108

Configuration task list ·················································································································································· 108

Enabling the SNTP service ·········································································································································· 108

Specifying an NTP server for the device ··················································································································· 109

Configuring SNTP authentication ······························································································································· 109

Displaying and maintaining SNTP ····························································································································· 110

SNTP configuration example ······································································································································ 110

Configuring PTP ······················································································································································· 112

Overview ······································································································································································· 112

Basic concepts ····················································································································································· 112

Synchronization mechanism ······························································································································· 114

Protocols and standards ····································································································································· 116

Feature and hardware compatibility ·························································································································· 117

Configuring clock nodes ············································································································································· 117

Specifying a PTP standard ·································································································································· 119

Specifying a clock node type ····························································································································· 119

Specifying a PTP domain ···································································································································· 120

Configuring an OC to operate only as a member clock ················································································ 120

Configuring ToD input or output ························································································································ 120

Configuring ToD clock parameters ···················································································································· 121

Configuring a priority for a clock ······················································································································ 121

Configuring the role of a PTP port ····················································································································· 122

Configuring the mode for carrying timestamps ································································································ 122

Specifying a delay measurement mechanism for a BC or an OC ································································· 123

Configuring the port type for a TC+OC ··········································································································· 123

Configuring the interval for sending announce messages ·············································································· 124

Specifying the number of announcement intervals before the receiving node stops receiving announce

messages ······························································································································································ 124

Configuring the interval for sending Pdelay_Req messages ··········································································· 125

Configuring the interval for sending Sync messages ······················································································ 125

Configuring the minimum interval for sending Delay_Req messages ···························································· 125

Configuring the MAC address for non-pdelay messages ··············································································· 126

Specifying the protocol for encapsulating PTP messages as UDP (IPv4) ······················································· 126

Configuring the source IP address for multicast PTP message transmission over UDP (IPv4) ······················ 126

Configuring the destination IP address for unicast PTP message transmission over UDP (IPv4) ················· 127

Configuring the delay correction value············································································································· 127

Configuring the cumulative offset between the UTC and TAI ········································································· 128

Configuring the correction date of the UTC ····································································································· 128

Setting a DSCP value for PTP messages transmitted over UDP (IPv4) ···························································· 128

Specifying the system time source as PTP ········································································································· 129

Enabling PTP on a port ······································································································································· 129

Displaying and maintaining PTP ································································································································· 129

PTP configuration example (IEEE 1588 version 2, IEEE 802.3/Ethernet encapsulation) ···································· 130

PTP configuration example (IEEE 1588 version 2, multicast transmission) ···························································· 132

PTP configuration example (IEEE 1588 version 2, unicast transmission) ······························································· 135

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