3Com MSR 50 Series, Руководство по настройке

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NTP Configuration Examples 2073
[RouterD] 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)
As shown above, Router D has been synchronized to Router D and the clock
stratum level of Router D is 3, while that of Router C is 2.
# View the NTP session information of Router D, which shows that an association
has been set up between Router D and Router C.
[RouterD] display ntp-service sessions
source reference stra reach poll now offset delay disper
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[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
Configuring MPLS VPN
Time Synchronization in
Server/Client Mode
Network requirements
■
As shown in Figure 622 , two VPNs are present on PE 1 and PE 2: VPN 1 and
VPN 2.
■
CE 1 and CE 3 are devices in VPN 1, while CE 2 and CE 4 are devices in VPN 2.
■
CE1’s local clock is to be used as a reference source, with the stratum level of 1.
■
CE 3 is synchronized to CE 1 in the server/client mode.
n
At present, MPLS VPN time synchronization can be implemented only in the
unicast mode (server/client mode or symmetric peers mode), but not in the
multicast or broadcast mode.