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High Availability for MCN
An SD-WAN High Availability (HA) configuration is a configuration in which two SD-WAN Appliances at a site serve in an Active/Standby partnership, for redundancy purposes.
Important
Both appliances in an HA pair must be the same appliance model.
To configure High Availability for the MCN site, do the following:
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Continuing in the Sites tree for the new MCN site, click + to the left of the High Availability branch for the site. This displays the High Availability configuration form.
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Click Edit (pencil icon) to the right of the High Availability branch to enable editing.
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Select the Enable High Availability check box. This enables High Availability for the site, and enables the first level of fields for configuring. A red asterisk (*) indicates a required field where you must enter a non-default value.
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Enter the basic High Availability parameter values for the HA pair. Enter or select the following:
- HA Appliance Name – This is the name of the HA (secondary) appliance.
Note
To change or specify the mode for a site, open the Basic Settings branch for the site, and select the mode from the Mode drop-down menu. The options are: client, primary MCN, or secondary MCN.
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Failover Time – This specifies the wait time (in milliseconds) after contact with the primary MCN appliance is lost, before the standby MCN appliance becomes active.
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Shared Base MAC – This is the shared MAC Address for the HA pair appliances.
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Swap Primary/Secondary (checkbox) – When this is selected, if both appliances in the HA pair come up simultaneously, the secondary MCN appliance becomes the primary MCN appliance, and takes precedence.
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Primary Reclaim (checkbox) – When this is selected, the designated primary MCN appliance reclaims control upon restart after a failover event.
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Click + to the right of HA IP Interfaces. This adds a new blank entry in the HA IP Interfaces table, and enables the entry for editing.
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Enter the HA IP Interfaces information for the MCN site.
Select or enter the following:
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Virtual Interface – This is the Virtual Interface to be used for communication between the appliances in the MCN HA pair.
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Primary – This is the unique Virtual IP Address for the primary MCN appliance. The secondary MCN uses this for communication with the primary MCN.
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Secondary – This is the unique Virtual IP Address for the secondary MCN appliance. The primary MCN uses this for communication with the secondary MCN.
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Click + to the left of the new HA IP Interfaces entry. This displays the External Tracking table, as shown in.
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Click + to the right of External Tracking. A new blank entry to the table is added and opened for editing.
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Enter the External Tracker IP Address. Enter the IP Address of the external device that responds to ARP requests regarding the state of the primary MCN appliance.
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Click Apply. The new High Availability configuration settings are added to the MCN site configuration.
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