R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

[RouterC-GigabitEthernet2/0/1] ntp-service broadcast-server authentication-keyid 88

# After NTP authentication is enabled on Router C, Router B can synchronize to Router C. Display

NTP service status information on Router B.

[RouterB-GigabitEthernet2/0/1] 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 Router B has synchronized to Router C. The stratum level of Router B is 4, and

that of Router C is 3

# Display the NTP session information of Router B, which shows that an association has been set

up between Router B and Router C.

[RouterB-GigabitEthernet2/0/1] 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 Router C does not affect Router A. Router A still

synchronizes to Router C.

[RouterA-GigabitEthernet2/0/1] 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)

Configuration example for MPLS VPN time synchronization in

client/server mode

Network requirements

As shown in Figure 32, 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. To synchronize the time between PE 2 and CE 1 and CE 3 in VPN 1, configure CE 1’s