Configuration Examples 309
# Enable the NTP authentication function.
[SW4500] ntp-service authentication enable
# Configure an MD5 authentication key, with the key ID being 42 and
the key being aNiceKey.
[SW4500] ntp-service authentication-keyid 42 authentication-mode md5
aNiceKey
# Specify the key as a trusted key.
[SW4500] ntp-service reliable authentication-keyid 42
[SW4500] ntp-service unicast-server 1.0.1.11 authentication-keyid 42
After the above configurations, SW4500 is ready to synchronize with Switch1.
Because the NTP authentication function is not enabled on Switch1, SW4500 will
fail to be synchronized to Switch1.
To synchronize the SW4500 Ethernet switch, you need to perform the following
configurations on Switch1.
# Enable the NTP authentication function on Switch1.
[Switch1] system-view
[Switch1] ntp-service authentication enable
# Configure an MD5 authentication key, with the key ID being 42 and
the key being aNiceKey.
[Switch1] ntp-service authentication-keyid 42 authentication-mode
md5 aNiceKey
# Specify the key as a trusted key.
[Switch1] ntp-service reliable authentication-keyid 42
(After the above configurations, the SW4500 Ethernet switch can be synchronized
to Switch1.) View the status of SW4500 after synchronization.
[SW4500] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
Nominal frequence: 250.0000 Hz
Actual frequence: 249.9992 Hz
Clock precision: 2^19
Clock offset: 0.66 ms
Root delay: 27.47 ms
Root dispersion: 208.39 ms
Peer dispersion: 9.63 ms
Reference time: 17:03:32.022 UTC Thu Sep 6 2001 (BF422AE4.05AEA86C)
The output information indicates that SW4500 is synchronized to Switch1, with a
clock stratum level of 3, one stratum level lower than that Switch1.
# View the information about NTP sessions of SW4500 (You can see that
a connection is established between SW4500 and Switch1).
<SW4500> display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[5]1.0.1.11 127.127.1.0 2 1 64 1 350.1 15.1 0.0
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
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