D-Link DXS-3227 - xStack Switch - Stackable, Руководство по установке в сети

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Stacking
Page 71
Removing and Replacing Stacking Members
Stacking member 1 and Stacking member 2 are Stacking Master enabled units. Unit 1 and Unit 2 are either desig-
nated as Master Unit or Secondary Master Unit. The Stacking Master assignment is performed during the configu-
ration process. One Master enabled stack member is elected Master, and the other Master enabled stack member
is elected Secondary Master, according to the following decision process:
•
If only one Stacking Master enabled unit is present, it is elected Master.
•
If two Stacking Masters enabled stacking members are present, and one has been manually configured as
the Stacking Master, the manually configured member is elected Stacking Master.
•
If two Master enabled units are present and neither has been manually configured as the Stacking Master, the
one with the longer up-time is elected Stacking Master.
•
If the two Master enabled stacking members are the same age, Unit 1 is elected Stacking Master.
Removing and Replacing Stacking Members
Stacking member 1 and Stacking member 2 are Stacking Master enabled units. Unit 1 and Unit 2 are either desig-
nated as Master Unit or Secondary Master Unit. The Stacking Master assignment is performed during the configu-
ration process. One Master enabled stack member is elected Master, and the other Master enabled stack member
is elected Secondary Master, according to the following decision process:
•
If only one Stacking Master enabled unit is present, it is elected Master.
•
If two Stacking Masters enabled stacking members are present, and one has been manually configured as
the Stacking Master, the manually configured member is elected Stacking Master.
•
If two Master enabled units are present and neither has been manually configured as the Stacking Master, the
one with the longer up-time is elected Stacking Master.
•
If the two Master enabled stacking members are the same age, Unit 1 is elected Stacking Master. Two stack-
ing member are considered the same age if they were inserted within the same ten minute interval.
For example, Stack member 2 is inserted in the first minute of a ten-minute cycle, and Stack member 1 is inserted
in fifth minute of the same cycle, the units are considered the same age. If there are two Master enabled units that
are the same age, then Unit 1 is elected master.
The Stacking Master and the Secondary Master maintain a Warm Standby. The Warm Standby ensures that the
Secondary Masterworks over for the Stacking Master if a failover occurs. This guarantees that the stack continues
to operate normally.
During the Warm Standby, the Master and the Secondary Masters are synchronized with the static configuration
only. When the Stacking Master is configured, the Stacking Master must synchronize the Stacking Secondary
Master. The Dynamic configuration is not saved, for example, dynamically learned MAC addresses are not saved.
Each port in the stack has a specific Unit ID, port type, and port number, which is part of both the configuration
commands and the configuration files. Configuration files are managed only from the device Stacking Master.
Exchanging Stacking Members
If a stack member with the same Unit ID replaces an existing Unit ID with the same Unit ID, the previous device
configuration is applied to the inserted stack member. If the new inserted device has either more than or less ports
than the previous device, the relevant port configuration is applied to the new stack member. For example:
Switching the Stacking Master
The Secondary Master replaces the Stacking Master if the following events occur:
•
The Stacking Master fails or is removed from the stack.
•
Links from the Stacking Master to the stacking members fails.
•
A soft switchover is performed with either via web interface or the CLI.