H3C Technologies H3C SecBlade LB Cards User Manual
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# NTP authentication is enabled on LB B, but not enabled on LB C, so LB B cannot synchronize to
LB C.
[LBB-GigabitEthernet0/1] display ntp-service status
Clock status: unsynchronized
Clock stratum: 16
Reference clock ID: none
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: 0.0000 ms
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)
# Enable NTP authentication on LB C. Configure an NTP authentication key, with the key ID of 88
and key value of 123456. Specify the key as a trusted key.
[LBC] ntp-service authentication enable
[LBC] ntp-service authentication-keyid 88 authentication-mode md5 123456
[LBC] ntp-service reliable authentication-keyid 88
# Specify LB C as an NTP broadcast server, and associate the key 88 with LB C.
[LBC] interface gigabitethernet 0/1
[LBC-GigabitEthernet0/1] ntp-service broadcast-server authentication-keyid 88
# After NTP authentication is enabled on LB C, LB B can synchronize to LB C. Display NTP service
status information on LB B.
[LBB-GigabitEthernet0/1] display ntp-service status
Clock status: synchronized
Clock stratum: 4
Reference clock ID: 3.0.1.31
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: 8.31 ms
Peer dispersion: 34.30 ms
Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that LB B has synchronized to LB C. The stratum level of LB B is 4, and that of LB
C is 3
# Display NTP session information for LB B, which shows that an association has been set up
between LB B and LB C.
[LBB-GigabitEthernet0/1] display ntp-service sessions
source reference
stra reach poll now offset delay disper
**************************************************************************
[1234] 3.0.1.31 127.127.1.0 3 254 64 62 -16.0 32.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
# Configuration of NTP authentication on LB C does not affect LB A. LB A still synchronizes to LB C.