HP 6125XLG R2306-HP 6125XLG Blade Switch Network Management and Monitoring Con - Page 40

NTP broadcast mode configuration example, Network requirements

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Clock stratum: 3 System peer: 3000::36 Local mode: sym_passive Reference clock ID: 163.29.247.19 Leap indicator: 11 Clock jitter: 0.000977 s Stability: 0.000 pps Clock precision: 2^-10 Root delay: 0.01855 ms Root dispersion: 9.23483 ms Reference time: d0c6047c.97199f9f Wed, Dec 29 2010 19:03:24.590 # Display IPv6 NTP association information for Device B. [DeviceB] display ntp-service ipv6 sessions Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured. Source: [12345]3000::36 Reference: 127.127.1.0 Reachabilities: 15 Last receive time: 19 Roundtrip delay: 0.0 Clock stratum: 2 Poll interval: 64 Offset: 0.0 Dispersion: 0.0 Source: [2345]3000::34 Reference: INIT Reachabilities: 1 Last receive time: 10 Roundtrip delay: 0.0 Clock stratum: 3 Poll interval: 64 Offset: 0.0 Dispersion: 0.0 Total sessions : 2 The output shows that an association has been set up between Device B and Device A, and Device B and Device C. NTP broadcast mode configuration example Network requirements As shown in Figure 12, Switch C functions as the NTP server for multiple devices on a network segment 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 broadcast server mode and sends out broadcast messages from VLAN-interface 2. • Switch A and Switch B operate in broadcast client mode, and listen to broadcast messages through VLAN-interface 2. 34

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34
Clock stratum: 3
System peer: 3000::36
Local mode: sym_passive
Reference clock ID: 163.29.247.19
Leap indicator: 11
Clock jitter: 0.000977 s
Stability: 0.000 pps
Clock precision: 2^-10
Root delay: 0.01855 ms
Root dispersion: 9.23483 ms
Reference time: d0c6047c.97199f9f
Wed, Dec 29 2010 19:03:24.590
# Display IPv6 NTP association information for Device B.
[DeviceB] display ntp-service ipv6 sessions
Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.
Source: [12345]3000::36
Reference: 127.127.1.0
Clock stratum: 2
Reachabilities: 15
Poll interval: 64
Last receive time: 19
Offset: 0.0
Roundtrip delay: 0.0
Dispersion: 0.0
Source:
[2345]3000::34
Reference: INIT
Clock stratum: 3
Reachabilities: 1
Poll interval: 64
Last receive time: 10
Offset: 0.0
Roundtrip delay: 0.0
Dispersion: 0.0
Total sessions : 2
The output shows that an association has been set up between Device B and Device A, and Device
B and Device C.
NTP broadcast mode configuration example
Network requirements
As shown in
Figure 12
, Switch C functions as the NTP server for multiple devices on a network segment
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 broadcast server mode and sends out broadcast messages from
VLAN-interface 2.
•
Switch A and Switch B operate in broadcast client mode, and listen to broadcast messages through
VLAN-interface 2.