Qtech QSW-8200-28T-POEAC- DC [68/77] Cluster keepalive loss count

User Manual

Chapter 3. Commands for Cluster 68

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 Default: The default value is 30 seconds.

 Command Mode: Global Configuration Mode.

 Usage Guide: After executing this command on a commander switch, the value of the

parameter will be distributed to all member switches via the TCP connections between

the commander and members.

 After executing it on a non commander switch, the configuration value will be saved

but not used until the switch becomes a commander. Before that, its keepalive interval

is the one distributed by its commander.

 Commander will send DP messages within the cluster once in every keepalive interval.

Members will respond to the received DP messages with DR messages.

 The no operation of this command will restore the keepalive interval in the cluster back

to its default value.

 Example: Set the keepalive interval in the cluster to 10 seconds.

 Switch(config)#cluster keepalive interval 10

3.6 cluster keepalive loss-count

 Command: cluster keepalive loss-count<loss-count>

 no cluster keepalive loss-count

 Function: Configure the max number of lost keepalive messages in a cluster that can be

tolerated.

 Parameters: loss-count: the tolerable max number of lost messages, ranging from 1 to

10.

 Default: The default value is 3.

 Command Mode: Global Configuration Mode

 Usage Guide: After executing this command on a commander switch, the value of the

parameter will be distributed to all member switches via the TCP connections between

the commander and members.

 After executing it on a non commander switch, the configuration value will be saved

but not used until the switch becomes a commander. Before that, its loss-count value is

the one distributed by its commander.

 commander calculates the loss-count after sending each DP message by adding 1 to the

loss-count of each switch and clearing that of a switch after receiving a DR message

from the latter. When a loss-count reaches the configured value (3 by default) without

receiving any DR message, the commander will delete the switch from its candidate

chain list.

 If the time that a member fails to receive DP messages from the commander reaches

loss-count, it will change its status to candidate.

 The no operation of this command will restore the tolerable max number of lost

keepalive messages in the cluster back to its default value: 3.

 Example: Set the tolerable max number of lost keepalive messages in the cluster to 5.

 Switch(config)#cluster keepalive loss-count 5