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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.

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).

Mandatory parameter descriptions for Link Monitor

destination

N/A

Destination IPv4 or IPv6 address for link verification.

state

N/A

Administrative state for link verification for the IP interface.

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

Non-mandatory parameter descriptions for Link Monitor

linkDetectionGroup

N/A

<LDG name> –  The name of the link detection group to which this link monitor belongs.

linkMonitor

1-23

<LM name> – The name of a link monitor that monitors a link to a destination for a specific interface.

interface

N/A

<interface name> – The name of the IP or management interface to be monitored.

interfaceGroup

N/A

<IG name> – The name of the IP interface group to be monitored.

Use this flag to enable/disable probing on the Standby port for the specified Link Monitor.

• disabled – Use this option to disable probing on Standby port when the router does not respond properly to the ARP/NUD probes. For additional details, see "Link Detection Support" topic at SBC Redundancy.
• enabled (default) – Use this option to allow probing on the Standby port.

Physical port associated with the IP interface to be monitored. In a redundancy configuration, pkt0_p is paired with pkt0_s and pkt1_p is paired with pkt1_s.

• pkt0_p – Packet 0 primary port.
• pkt0_s – Packet 0 secondary port.
• pkt1_p – Packet 1 primary port.
• pkt1_s – Packet 1 secondary port.

reattemptTimer

N/A

Time to wait for a link verification reattempt. Minimum timer value is 300 (milliseconds).

responseTimer

N/A

Time to wait for a link verification attempt. Minimum timer value is 300 (milliseconds).

retries

N/A

Specifies the number of retries before link verification is considered failed. Minimum is 1.

verifyTimer

1000-60000

Time interval between link verification attempts, in milliseconds.