# Configure Switch A as the NTP multicast client and configure Switch A to sense NTP multicast
packets through VLANIF20.
<SwitchA> system-view
[SwitchA] interface vlanif 20
[SwitchA-vlanif20] ntp-service multicast-client
[SwitchA-vlanif20] quit
Step 6 Verify the configuration.
After the configurations, the clock on Switch D can be synchronized to the clock on Switch C,
but the clock on Switch A cannot be synchronized
because Switch A and Switch C are on different network segments and Switch A cannot receive
the multicast packets sent from Switch C.
Check the NTP status of Switch D, and you can see that the status of the clock is synchronized.
This means that the synchronization is complete. The stratum of the clock of Switch D is 3, one
stratum lower than the clock stratum of Switch C.
[SwitchD] display ntp-service status
clock status: synchronized
clock stratum: 3
reference clock ID: 3.0.1.31
nominal frequency: 60.0002 Hz
actual frequency: 60.0002 Hz
clock precision: 2^18
clock offset: 0.66 ms
root delay: 24.47 ms
root dispersion: 208.39 ms
peer dispersion: 9.63 ms
reference time: 17:03:32.022 UTC Apr 25 2005(C61734FD.800303C0)
----End
Configuration Files
l Configuration file of Switch A
#
sysname SwitchA
#
vlan batch 20
#
interface Vlanif20
ip address 1.0.1.11 255.255.255.0
ntp-service multicast-client
#
interface GigabitEthernet0/0/1
port hybrid pvid vlan 20
port hybrid untagged vlan 20
ospf 1
area 0.0.0.0
network 1.0.1.0 0.0.0.255
#
return
l Configuration file of Switch C
#
sysname SwitchC
#
vlan batch 10
#
ntp-service refclock-master 2
#
interface Vlanif10
ip address 3.0.1.31 255.255.255.0
Quidway S5700 Series Ethernet Switches
Configuration Guide - Network Management 4 NTP Configuration
Issue 01 (2011-10-26) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
243
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