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In this section:

Allow ARP Broadcast Probe Reply

Use the link detection allowArpBroadcastProbeReply parameter to control at the system-level whether the SBC allows or drops broadcast ARP replies.

Caution

For the SBC SWe deployments, enabling this parameter results in the SBC allowing through both ARP Broadcast opCode Reply and opCode Request packets. This can make the SBC susceptible to a false indication of link failure if the network carries a high volume of opCode Request packets. This type of packet is typically sent during broadcast ARP storms.

Command Syntax

% set system admin <systemName> linkDetection allowArpBroadcastProbeReply <disabled | enabled>

Command Parameters

ParameterDescription

allowArpBroadcastProbeReply

Enable this flag to have the SBC allow broadcast replies to ARP probe requests on standby ports.

  • disabled (default)
  • enabled

Configuration Example

Issue the following commands to enable accepting broadcast replies to ARP probe requests on standby ports on a system named "SBC-1."

% set system admin SBC-1 linkDetection allowArpBroadcastProbeReply enabled
% commit


Toggle Recover Timer

This feature adds the link detection toggleRecoverTimer. The toggleRecoverTimer starts if configured with a non-zero value when the SBX stops toggling between primary and secondary ports - 5 switches in 30 seconds (2 minutes for BFD). When this timer expires, the SBC checks the link status. If the links are not good and the node switchover is possible (checks multiple conditions such as the standby node's state, peer LDG state, and so on), then it initiates the node switchover and triggers an alarm to highlight the condition. If the switchover is not possible, or the switchover doesn't succeed, then the timer restarts.

Command Syntax

% set system admin <systemName> linkDetection toggleRecoverTimer <0-3600>

Command Parameters

ParameterLength/RangeDefaultDescription

toggleRecoverTimer

0-3600 seconds0

The toggleRecoverTimer starts if configured with a non-zero value when the SBC stops toggling between primary and secondary ports. 

When the timer expires, the alarm sonusSbxLvmPrgSwitchoverToRecoverLinksNotification - MAJOR is generated.

Configuration Example

Issue the following commands to start the Toggle Recover Timer on a system named "SBC-1" when it stops toggling between primary and secondary ports.

% set system admin SBC-1 linkDetection toggleRecoverTimer 120
% commit