HP VPN Firewall Appliances System Management and Maintenance Configuration Guide

134
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 Firewall A has synchronized to Firewall C. The stratum level of Firewall A is
3, and that of Firewall C is 2.
# Display NTP session information for Firewall A, which shows that an association has been set up
between Firewall A and Firewall C.
[FirewallA-GigabitEthernet0/1] 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
NTP multicast mode configuration example
Network requirements
As shown in Figure 60, Firewall B functions as the NTP server for multiple devices on different network
segments and synchronizes the time among multiple devices.
• Firewall B's local clock is to be used as a reference source, with the stratum level 2.
• Firewall B operates in multicast server mode and sends multicast messages from GigabitEthernet
0/1.
• Firewall A and Firewall C operate in multicast client mode and receive multicast messages through
their respective GigabitEthernet 0/1.
Figure 60 Network diagram
Configuration procedure
1. Set the IP address for each interface as shown in Figure 60. (Details not shown.)
2. Configure Firewall B:
GE0/1
1.0.1.10/24
Firewall A
NTP multicast client
GE0/1
3.0.1.31/24
GE0/1
3.0.1.32/24
Device
Firewall B
NTP multicast server
Firewall C
NTP multicast client
GE0/1
1.0.1.11/24
GE0/2
3.0.1.30/24