The configuration of NTP multicast mode on H3C 5600 switch

The configuration of NTP multicast mode on H3C 5600 switch

I            Requirement for the diagram

1.      Set the switch3’s local clock as the master clock of NTP. Layer is 2 and the switch3 send the multicast message capsule via vlan-interface2.

2.      S5600-1 and S5600-2 listen multicast message from corresponding vlan-interface2.

II          Network topology.

III        Steps of configuration

Configure switch3:

1.      enter system view

<Switch3> system-view

2.      Enter the vlan-interface2 interface view

[Switch3] interface Vlan-interface 2

[Switch3-Vlan-interface2]

3.      Set the switch as broadcast server and send the broadcast message from vlan-interface2.

[Switch3-Vlan-interface2] ntp-service multicast-server

Configure S5600-1:

1.      enter system view

<S5600-1> system-view

2.      Enter the vlan-interface2 interface view

[S5600-1] interface Vlan-interface 2

[S5600-1-Vlan-interface2]

3.      Set the switch as broadcast client.

[S5600-1-Vlan-interface2] ntp-service multicast-client

Configure S5600-2:

1.      enter system view

<S5600-2> system-view

2.      Enter the vlan-interface2 interface view

[S5600-2] interface Vlan-interface 2

[S5600-2-Vlan-interface2]

3.      Set the switch as broadcast client.

 [S5600-2-Vlan-interface2] ntp-service multicast-client

IV       Key notes in the configuration

1.      S5600-1 and S5600-2 listen the multicast message from vlan-interface2 and the switch3 send the multicast message from vlan-interface2. Because S5600-2 and switch3 are not the same network segment, S5600-2 can’t receive the multicast message from switch3. But S5600-1can receive the multicast from switch3 and then keep synchronization with switch3.

2.      After keep synchronization, the status of S5600-1:

[S5600-1] display ntp-service status

Clock status: synchronized

Clock stratum: 3

Reference clock ID: 3.0.1.31

Nominal frequency: 250.0000 Hz

Actual frequency: 249.9992 Hz

Clock precision: 2^19

Clock offset: 198.7425 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)

3.      display the NTP sessions:

[S5600-1] display ntp-service sessions

source        reference       stra reach poll  now offset  delay disper

**************************************************************************

[1]3.0.1.31     127.127.1.0      2    1     64    377  26.1   199.53  9.7

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured.