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Network requirements – H3C Technologies H3C S6300 Series Switches User Manual

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# Configure Switch A to operate in IPv6 multicast client mode and receive IPv6 multicast messages

on VLAN-interface 3.

[SwitchA] interface vlan-interface 3

[SwitchA-Vlan-interface3] ntp-service ipv6 multicast-client ff24::1

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: 3000::2

Local mode: bclient

Reference clock ID: 165.84.121.65

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 IPv6 NTP association information for Switch A.

[SwitchA-Vlan-interface3] display ntp-service ipv6 sessions

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

Source: [124]3000::2

Reference: 127.127.1.0 Clock stratum: 2

Reachabilities: 2 Poll interval: 64

Last receive time: 71 Offset: -0.0

Roundtrip delay: 0.0 Dispersion: 0.0

Total sessions : 1

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

Configuration example for NTP client/server mode

with authentication

Network requirements

As shown in

Figure 15

, do the following:

Configure the local clock of Device A as a reference source, with the stratum level 2.

Configure Device B to operate in client mode and specify Device A as the NTP server of Device B,
with Device B as the client.

Configure NTP authentication on both Device A and Device B.