H3C SR6600-X Configuration Manual page 112

# Enable the NTP service.
<RouterC> system-view
[RouterC] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 2.
[RouterC] ntp-service refclock-master 2
# Configure Router C to operate in IPv6 multicast server mode and send multicast messages
through GigabitEthernet 2/0/1.
[RouterC] interface gigabitethernet 2/0/1
[RouterC-GigabitEthernet2/0/1] ntp-service ipv6 multicast-server ff24::1
3. Configure Router D:
# Enable the NTP service.
<RouterD> system-view
[RouterD] ntp-service enable
# Configure Router D to operate in IPv6 multicast client mode and receive multicast messages on
GigabitEthernet 2/0/1.
[RouterD] interface gigabitethernet 2/0/1
[RouterD-GigabitEthernet2/0/1] ntp-service ipv6 multicast-client ff24::1
4. Verify the configuration:
Router D and Router C are on the same subnet, so Router D can do the following:
Receive the IPv6 multicast messages from Router C without being enabled with the IPv6
multicast functions.
Synchronize to Router C.
# Verify that Router D has synchronized to Router C, and the clock stratum level is 3 on Router D
and 2 on Router C.
[RouterD-GigabitEthernet2/0/1] 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: 0.000977 s
Stability: 0.000 pps
Clock precision: 2^-10
Root delay: 0.00000 ms
Root dispersion: 8.00578 ms
Reference time: d0c60680.9754fb17
# Verify that an IPv6 NTP association has been established between Router D and Router C.
[RouterD-GigabitEthernet2/0/1] display ntp-service ipv6 sessions
Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.
Source: [1234]3000::2
Reference: 127.127.1.0
Reachabilities: 111
Last receive time: 23
Roundtrip delay: 0.0
Wed, Dec 29 2010 19:12:00.591
Clock stratum: 2
Poll interval: 64
Offset: -0.0
Dispersion: 0.0
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