Grandmaster Cluster Configuration

This needs to be configured when multiple Grandmasters are used in order to provide a level of network path and / or Grandmaster system protection for the Timing Client devices. The Best Master Clock algorithm (BMC) is used to provide decision process which is being executed on the Grandmasters within the cluster and the Timing Client devices.

It is necessary that all Master’s in Grand Master Cluster table should point to other masters and have same unicast slave table configuration for BMC to function properly

ptp grandmaster-cluster add

The IP-Address of the other Grandmaster(s) is added to the cluster table.

config ptp grandmaster-cluster  add 192.168.40.220
config ptp grandmaster-cluster  add 192.168.40.220
ptp grandmaster-cluster del

Deletes the IP-Address of the other Grandmaster(s) currently in the cluster table.

config ptp grandmaster-cluster  del 192.168.40.220
Grandmaster Cluster Example

The example show there Grandmaster cluster consists of four TCA8000 Timing Servers (Grandmaster) and IP-address configurations at each TCA8000 Timing Server.

  • Master M1 : 10.1.9.10
  • Master M2 : 10.1.9.11
  • Master M3 : 10.1.9.12
  • Master M4 : 10.1.9.13
Grandmaster Table Cluster @ Master – M1 is

  • Master M2 : 10.1.9.11
  • Master M3 : 10.1.9.12
  • Master M4 : 10.1.9.13
Grandmaster Table Cluster @ Master – M2 is

  • Master M1 : 10.1.9.10
  • Master M3 : 10.1.9.12
  • Master M4 : 10.1.9.13
Grandmaster Table Cluster @ Master – M3 is

  • Master M1 : 10.1.9.10
  • Master M2 : 10.1.9.11
  • Master M4 : 10.1.9.12

At each Grandmaster the Unicast Slave table should have the same Timing Client IP-addresses.

Table 37: UNICAST SLAVE Table

SLAVE S1: 10.1.10.1

SLAVE S2: 10.1.10.2

SLAVE S3: 10.1.10.3

……….

……….

SLAVE S256: 10.1.12.23