H3c-technologies H3C WX6000 Series Access Controllers Uživatelský manuál stáhnout pdf (Strana 502)

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Network diagram

Figure 54-8 Network diagram for NTP symmetric peers mode configuration

Configuration procedure

1) Configuration on AC A:

# Specify the local clock as the reference source, with the stratum level of 2.

<AC A> system-view

[AC A] ntp-service refclock-master 2

2) Configuration on AC B:

# Specify AC A as the NTP server of AC B.

<AC B> system-view

[AC B] ntp-service unicast-server 3.0.1.31

3) Configuration on AC C (after AC B is synchronized to AC A):

# Specify the local clock as the reference source, with the stratum level of 1.

<AC C> system-view

[AC C] ntp-service refclock-master 1

# Configure AC B as a symmetric peer after local synchronization.

[AC C] ntp-service unicast-peer 3.0.1.32

In the step above, AC B and AC C are configured as symmetric peers, with AC C in the

symmetric-active mode and AC B in the symmetric-passive mode. Because the stratum level of AC C is

1 while that of AC B is 3, AC B is synchronized to AC C.

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

[AC B] display ntp-service status

Clock status: synchronized

Clock stratum: 2

Reference clock ID: 3.0.1.33

Nominal frequency: 100.0000 Hz

Actual frequency: 100.0000 Hz

Clock precision: 2^7

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 Apr 20 2007 (C6D95647.153F7CED)

As shown above, AC B has been synchronized to AC C, and the clock stratum level of AC B is 2, while

that of AC C is 1.

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