HP 5500 Ei 5500 Si Switch Series Configuration Guide
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Page 2321
20 • A client can synchronize to the server only when you configure all the required tasks on both the client and server. • On the client, if NTP authentication is not enabled or no key is specified to associate with the NTP server, the client is not authenticated. No matter whether NTP authentication is enabled or not on the server, the clock synchronization between the server and client can be performed. • On the client, if NTP authentication is enabled and a key is specified to associate...
Page 2322
21 Step Command Remarks 6. Associate the specified key with an NTP server. • Broadcast server mode: ntp-service broadcast-server authentication-keyid keyid • Multicast server mode: ntp-service multicast-server authentication-keyid keyid You can associate a non-existing key with an NTP server. To enable NTP authentication, you must configure the key and specify it as a trusted key after associating the key with the NTP server. Displaying and maintaining NTP Task Command...
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22
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900 (00000000.00000000)
# Specify Device A as the NTP server of Device B so Device B synchronizes to Device A.
system-view
[DeviceB] ntp-service unicast-server 1.0.1.11
# Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2322.png "Page 2323
22
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900 (00000000.00000000)
# Specify Device A as the NTP server of Device B so Device B synchronizes to Device A.
system-view
[DeviceB] ntp-service unicast-server 1.0.1.11
# Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service...")
22 Nominal frequency: 64.0000 Hz Actual frequency: 64.0000 Hz Clock precision: 2^7 Clock offset: 0.0000 ms Root delay: 0.00 ms Root dispersion: 0.00 ms Peer dispersion: 0.00 ms Reference time: 00:00:00.000 UTC Jan 1 1900 (00000000.00000000) # Specify Device A as the NTP server of Device B so Device B synchronizes to Device A. system-view [DeviceB] ntp-service unicast-server 1.0.1.11 # Display the NTP status of Device B after clock synchronization. [DeviceB] display ntp-service...
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23
Figure 12 Network diagram
Configuration procedure
1. Configure IP addresses for inte rfaces. (Details not shown.)
2. Configure Device B:
# Specify Device A as the NTP server of Device B.
system-view
[DeviceB] ntp-service unicast-server 3.0.1.31
3. Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 100.0000 Hz
Actual frequency:...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2323.png "Page 2324
23
Figure 12 Network diagram
Configuration procedure
1. Configure IP addresses for inte rfaces. (Details not shown.)
2. Configure Device B:
# Specify Device A as the NTP server of Device B.
system-view
[DeviceB] ntp-service unicast-server 3.0.1.31
3. Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 100.0000 Hz
Actual frequency:...")
23 Figure 12 Network diagram Configuration procedure 1. Configure IP addresses for inte rfaces. (Details not shown.) 2. Configure Device B: # Specify Device A as the NTP server of Device B. system-view [DeviceB] ntp-service unicast-server 3.0.1.31 3. Display the NTP status of Device B after clock synchronization. [DeviceB] display ntp-service status Clock status: synchronized Clock stratum: 3 Reference clock ID: 3.0.1.31 Nominal frequency: 100.0000 Hz Actual frequency:...
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24
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: -21.1982 ms
Root delay: 15.00 ms
Root dispersion: 775.15 ms
Peer dispersion: 34.29 ms
Reference time: 15:22:47.083 UTC Sep 19 2005 (C6D95647.153F7CED)
The output shows that Device C has synchronized to Device B because it has a higher stratum than
Device B.
# Display the NTP session information of Device C.
[DeviceC] display ntp-service sessions
source reference...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2324.png "Page 2325
24
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: -21.1982 ms
Root delay: 15.00 ms
Root dispersion: 775.15 ms
Peer dispersion: 34.29 ms
Reference time: 15:22:47.083 UTC Sep 19 2005 (C6D95647.153F7CED)
The output shows that Device C has synchronized to Device B because it has a higher stratum than
Device B.
# Display the NTP session information of Device C.
[DeviceC] display ntp-service sessions
source reference...")
24
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: -21.1982 ms
Root delay: 15.00 ms
Root dispersion: 775.15 ms
Peer dispersion: 34.29 ms
Reference time: 15:22:47.083 UTC Sep 19 2005 (C6D95647.153F7CED)
The output shows that Device C has synchronized to Device B because it has a higher stratum than
Device B.
# Display the NTP session information of Device C.
[DeviceC] display ntp-service sessions
source reference...
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25
# Configure Switch C to operate in broadcast server mode and send broadcast messages through
VLAN-interface 2.
[SwitchC] interface vlan-interface 2
[SwitchC-Vlan-interface2] ntp-service broadcast-server
3. Configure Switch A:
# Configure Switch A to operate in broadcast client mode and receive broadcast messages on
VLAN-interface 2.
system-view
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ntp-service broadcast-client
4. Configure Switch B:
# Configure Switch B to...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2325.png "Page 2326
25
# Configure Switch C to operate in broadcast server mode and send broadcast messages through
VLAN-interface 2.
[SwitchC] interface vlan-interface 2
[SwitchC-Vlan-interface2] ntp-service broadcast-server
3. Configure Switch A:
# Configure Switch A to operate in broadcast client mode and receive broadcast messages on
VLAN-interface 2.
system-view
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ntp-service broadcast-client
4. Configure Switch B:
# Configure Switch B to...")
25 # Configure Switch C to operate in broadcast server mode and send broadcast messages through VLAN-interface 2. [SwitchC] interface vlan-interface 2 [SwitchC-Vlan-interface2] ntp-service broadcast-server 3. Configure Switch A: # Configure Switch A to operate in broadcast client mode and receive broadcast messages on VLAN-interface 2. system-view [SwitchA] interface vlan-interface 2 [SwitchA-Vlan-interface2] ntp-service broadcast-client 4. Configure Switch B: # Configure Switch B to...
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26 • 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. NOTE: In this example, Switch B must be a Layer 3 switch that supports multicast routing. Figure 14 Network diagram Configuration procedure 1. Set the IP address for each interface as shown in Figure 14. (Details...
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27
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 Device D has synchronized to Device C because it has a higher stratum than
Device C.
# Display the NTP session in formation of Device D.
[DeviceD-Vlan-interface2] display ntp-service sessions
source reference stra reach poll now offset delay disper...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2327.png "Page 2328
27
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 Device D has synchronized to Device C because it has a higher stratum than
Device C.
# Display the NTP session in formation of Device D.
[DeviceD-Vlan-interface2] display ntp-service sessions
source reference stra reach poll now offset delay disper...")
27
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 Device D has synchronized to Device C because it has a higher stratum than
Device C.
# Display the NTP session in formation of Device D.
[DeviceD-Vlan-interface2] display ntp-service sessions
source reference stra reach poll now offset delay disper...
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28
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 40.00 ms
Root dispersion: 10.83 ms
Peer dispersion: 34.30 ms
Reference time: 16:02:49.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Device A has synchronized to Device C because it has a higher stratum than
Device C.
# Display the NTP session in formation of Device A.
[DeviceA-Vlan-interface3] display ntp-service sessions
source reference stra reach poll now offset delay disper...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2328.png "Page 2329
28
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 40.00 ms
Root dispersion: 10.83 ms
Peer dispersion: 34.30 ms
Reference time: 16:02:49.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Device A has synchronized to Device C because it has a higher stratum than
Device C.
# Display the NTP session in formation of Device A.
[DeviceA-Vlan-interface3] display ntp-service sessions
source reference stra reach poll now offset delay disper...")
28
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 40.00 ms
Root dispersion: 10.83 ms
Peer dispersion: 34.30 ms
Reference time: 16:02:49.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Device A has synchronized to Device C because it has a higher stratum than
Device C.
# Display the NTP session in formation of Device A.
[DeviceA-Vlan-interface3] display ntp-service sessions
source reference stra reach poll now offset delay disper...
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29
# Set an authentication key.
[DeviceA] ntp-service authentication-keyid 42 authentication-mode md5 aN\
iceKey
# Specify the key as a trusted key.
[DeviceA] ntp-service reliable authentication-keyid 42
# Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms...](http://img.usermanuals.tech/thumb/36/58909/w300_hp-5500-ei-5500-si-switch-series-configuration-guide-2329.png "Page 2330
29
# Set an authentication key.
[DeviceA] ntp-service authentication-keyid 42 authentication-mode md5 aN\
iceKey
# Specify the key as a trusted key.
[DeviceA] ntp-service reliable authentication-keyid 42
# Display the NTP status of Device B after clock synchronization.
[DeviceB] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms...")
29 # Set an authentication key. [DeviceA] ntp-service authentication-keyid 42 authentication-mode md5 aN\ iceKey # Specify the key as a trusted key. [DeviceA] ntp-service reliable authentication-keyid 42 # Display the NTP status of Device B after clock synchronization. [DeviceB] display ntp-service status Clock status: synchronized Clock stratum: 3 Reference clock ID: 1.0.1.11 Nominal frequency: 64.0000 Hz Actual frequency: 64.0000 Hz Clock precision: 2^7 Clock offset: 0.0000 ms...