R3166-R3206-HP High-End Firewalls System Management and Maintenance Configuration Guide-6PW101

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 Firewall A as the NTP server of Firewall B so that Firewall B is synchronized to Firewall A.

<FirewallB> system-view

[FirewallB] ntp-service unicast-server 1.0.1.11

# View the NTP status of Firewall B after clock synchronization.

[FirewallB] 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

Root delay: 31.00 ms

Root dispersion: 1.05 ms

Peer dispersion: 7.81 ms

Reference time: 14:53:27.371 UTC Sep 19 2005 (C6D94F67.5EF9DB22)

As shown above, Firewall B has been synchronized to Firewall A, and the clock stratum level of Firewall

B is 3, while that of Firewall A is 2.

# View the NTP session information of Firewall B, which shows that an association has been set up

between Firewall B and Firewall A.

[FirewallB] display ntp-service sessions

source reference stra reach poll now offset delay disper

**************************************************************************

[12345] 1.0.1.11 127.127.1.0 2 63 64 3 -75.5 31.0 16.5

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured

Total associations : 1

Configuring the NTP symmetric mode

Network requirements

• The local clock of Firewall A is to be configured as a reference source, with the stratum level of 2.

• Firewall B works in the client mode and Firewall A is to be used as the NTP server of Firewall B.

• Firewall C works in the symmetric-active mode and Firewall B will act as peer of Firewall C. Firewall

C is the symmetric-active peer while Firewall B is the symmetric-passive peer.