HP 6125G HP 6125G & 6125G/XG Blade Switches Network Management and Mon - Page 33

Configuring NTP multicast mode, Network requirements

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Clock status: synchronized Clock stratum: 3 Reference clock ID: 3.0.1.31 Nominal frequency: 64.0000 Hz Actual frequency: 64.0000 Hz Clock precision: 2^7 Clock offset: 0.0000 ms Root delay: 31.00 ms Root dispersion: 8.31 ms Peer dispersion: 34.30 ms Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02) The output shows that Switch A has synchronized to Switch C because it has a higher stratum than Switch C. # Display NTP session information for Switch A. [SwitchA-Vlan-interface2] display ntp-service sessions source reference stra reach poll now offset delay disper [1234] 3.0.1.31 127.127.1.0 2 254 64 62 -16.0 32.0 16.6 note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured Total associations : 1 The output shows that an association has been set up between Switch A and Switch C. Configuring NTP multicast mode Network requirements As shown in Figure 14, configure Device C as a reference source, with the stratum level 2. • Configure Device C to operate in multicast server mode and send multicast messages from VLAN-interface 2. • Configure Device A and Device D to operate in multicast client mode and receive multicast messages through VLAN-interface 3 and VLAN-interface 2 respectively. Figure 14 Network diagram 26

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26
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 8.31 ms
Peer dispersion: 34.30 ms
Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Switch A has synchronized to Switch C because it has a higher stratum than
Switch C.
# Display NTP session information for Switch A.
[SwitchA-Vlan-interface2] display ntp-service sessions
source
reference
stra
reach
poll
now
offset
delay
disper
**************************************************************************
[1234] 3.0.1.31
127.127.1.0
2
254
64
62
-16.0
32.0
16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations :
1
The output shows that an association has been set up between Switch A and Switch C.
Configuring NTP multicast mode
Network requirements
As shown in
Figure 14
, configure Device C as a reference source, with the stratum level 2.
•
Configure Device C to operate in multicast server mode and send multicast messages from
VLAN-interface 2.
•
Configure Device A and Device D to operate in multicast client mode and receive multicast
messages through VLAN-interface 3 and VLAN-interface 2 respectively.
Figure 14
Network diagram