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Ipv6 ntp multicast mode configuration example, Network requirements – H3C Technologies H3C S6300 Series Switches User Manual

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[SwitchA] interface vlan-interface 3

[SwitchA-Vlan-interface3] ntp-service multicast-client

7.

Verify the configuration:
# Display the NTP status of Switch A after clock synchronization.

[SwitchA-Vlan-interface3] display ntp-service status

Clock status: synchronized

Clock stratum: 3

System peer: 3.0.1.31

Local mode: bclient

Reference clock ID: 3.0.1.31

Leap indicator: 00

Clock jitter: 0.165741 s

Stability: 0.000 pps

Clock precision: 2^-10

Root delay: 0.00534 ms

Root dispersion: 4.51282 ms

Reference time: d0c61289.10b1193f Wed, Dec 29 2010 20:03:21.065

The output shows that Switch A has been synchronized to Switch C, the clock stratum level of
Switch A is 3, and that of Switch C is 2.
# Display IPv4 NTP association information for Switch A.

[SwitchA-Vlan-interface3] display ntp-service sessions

source reference stra reach poll now offset delay disper

********************************************************************************

[1234]3.0.1.31 127.127.1.0 2 247 64 381 -0.0 0.0053 4.5128

Notes: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured.

Total sessions : 1

The output shows that an association has been set up between Switch A and Switch C.

IPv6 NTP multicast mode configuration example

Network requirements

As shown in

Figure 14

, Switch C functions as the NTP server for multiple devices on different network

segments and synchronizes the time among multiple devices.

Switch C's local clock is to be used as a reference source, with the stratum level 2.

Switch C operates in IPv6 multicast server mode and sends out IPv6 multicast messages from
VLAN-interface 2.

Switch A and Switch D operate in IPv6 multicast client mode and receive IPv6 multicast messages

through VLAN-interface 3 and VLAN-interface 2, respectively.