How to determine VRRP master and slave devices

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The master and slave devices can be specified by setting VRRP priorities. The device of the highest priority functions as the Master device and the device of a lower priority functions as the slave device.

If two devices have the same priority, when the two devices are restarted, the device whose state machine enters the Master state first is the Master device. This saves an unnecessary switchover.

Other related questions:
Determine the VRRP master and backup devices for an S series switch
The following methods can be used to determine VRRP master and backup devices for S series switches: - Specify master and backup devices in a VRRP group by setting different priorities. The device of a higher priority functions as a master, and the device of a lower priority functions as a backup. - When two devices of the same priority restart, the device that switches to the master state first functions as the master. The purpose is to decrease an unnecessary switchover.

Master or Slave subracks of OSN9800
OSN 9800 does not support optical-layer slave subracks.

Specifications for slave subrack expansion on the master subrack of OSN 8800 T32
The TN52SCC board supports a total of 20 optical and electrical subracks, containing four or less electrical subracks. The TN51SCC board supports a total of eight optical and electrical subracks, containing four or less electrical subracks. The subracks run in master/slave mode. The number of subracks here indicates the number of equivalent subracks. One OSN 6800 subrack equals to one equivalent subrack, and one OSN 8800 T32 subrack equals to two equivalent subracks.

Method used to distinguish master and slave subracks onsite
The LED indicator on the SCC or AUX board indicates whether the subrack is a master or slave subrack when subracks are cascaded. "0" indicates the master subrack. "EE" indicates that the subrack ID is incorrect or cannot be read. Other values indicate slave subracks. For example, "1" indicates slave subrack 1, and "2" indicates slave subrack 2.

Changing OSN 1800 independent subracks to master/slave subracks
Associating a logical master subrack with a physical subrack: After creating an NE on the NMS and uploading NE data, associate the logical master subrack with a physical subrack. Adding logical slave subracks: Based on the ID information of slave subracks in the actual networking, add logical slave subracks. Associating logical slave subracks with physical slave subracks: Based on the networking status, associate logical slave subracks with master slave subracks to establish the mapping between the subracks.

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