H3c-technologies H3C WX6000 Series Access Controllers Uživatelský manuál stáhnout pdf (Strana 508)

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[AC B] ntp-service unicast-server 1.0.1.11 authentication-keyid 42

Before AC B can synchronize its clock to that of AC A, you need to enable NTP authentication for AC A.

Perform the following configuration on AC A:

# Enable NTP authentication.

[AC A] ntp-service authentication enable

# Set an authentication key.

[AC A] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey

# Specify the key as key as a trusted key.

[AC A] ntp-service reliable authentication-keyid 42

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

[AC B] display ntp-service status

Clock status: synchronized

Clock stratum: 3

Reference clock ID: 1.0.1.11

Nominal frequency: 100.0000 Hz

Actual frequency: 100.0000 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 Apr 20 2007 (C6D94F67.5EF9DB22)

As shown above, AC B has been synchronized to AC A, and the clock stratum level of AC B is 3, while

that of AC A is 2.

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

and AC A.

[AC B] 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 NTP Broadcast Mode with Authentication

Network requirements

z AC A’s local clock is to be used as a reference source, with the stratum level of 3.

z AC A works in the broadcast server mode and sends out broadcast messages from VLAN-interface

z AC B works in the broadcast client mode and receives broadcast messages through

VLAN-interface 2.

z NTP authentication is enabled on both AC A and AC B.

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