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0Table
1Link Detection Group Parameters

Parameter

Length/Range

Description

linkDetectionGroup

N/A

<LDG name> – Name of the Link Detection Group.

ceName

1-23

The name of the computing element (CE) that hosts this link detection group.

Note

'ceName' is not the system name. For an HA system, link detection needs to be setup on both CEs.

linkMonitor

N/A

<link monitor name> – Name of the link monitor that monitors a link to a destination for a specific interface. For parameter details, see Link Monitor Parameters table below.

reattemptTimer

300-10000

Time (in milliseconds) to wait for a link verification reattempt. (default = 1000).

responseTimer

500-10000

Time (in milliseconds) to wait for a link verification attempt. (default = 500).

retries

1-10

Specifies the number of retries before link verification is considered failed. (default = 3).

state

N/A

Administrative state of the Link Detection Group.

  • enabled – LDG is turned on and active
  • disabled (default) – LDG is not in use

threshold

0-10

The number of link monitor failures that will trigger this link detection group to declare a failure and attempt a switchover to the standby server (default = 2). A value of "0" disables fault reporting and the switchover is attempted.

When a nonzero threshold value is specified for a standby module, the number of link failures present must be less than that value in order for that module to be activated by a switchover. When threshold is greater the number of link failures, a switchover is not attempted.

The following threshold settings are recommended:

Non-management interfaces:

  • Set threshold to "1" for SBC 5000 series systems.
  • Set threshold to "2" for SBC 7000 series systems.

Management interfaces:

  • Set threshold to "1" when dual management subnets are deployed (such as an ePSX deployment).
  • Set threshold to "2" under most circumstances.

type

N/A

The interface type supported by this link detection group.

  • ip (default)
  • mgmt – indicates types of interfaces that are monitored with this Link Detection Group.

verifyTimer

1000-60000

Time interval between link verification attempts representing the frequency at which an ICMP echo request is sent (default = 1000).

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