Contents
Introduction
You can optionally deploy a pair of
The Active and Standby SWe Edge instances operate using a single HA license. At the time of initial setup, you install the HA license on the Active instance. Once accepted, the HA system replicates the information to the Standby instance.
Provisioning for HA can only be done at the time of initial installation and only for a pair of devices that solely support SIP to SIP calls. Additional limitations apply. See Limitations.
For installation and HA activation instructions, refer to Workflow for Initial Setup - High Availability.
Architecture
In an
During the initial setup, the Standby device (8300-2 in the example) receives its own Eth1 and Eth3 IP address assignments (IP Assign Method: Static). Once you enable HA, the Standby instance monitors the Active instance through the HA interface (port ge6). When a failover occurs, the HA function assigns the Eth1 and Eth3 addresses from the (former) Active instance to the Standby instance, and the Standby instance acts as the new Active instance to process calls.
The following diagram depicts a typical HA setup. Your network administrator will assign specific IP addresses to suit the needs of your particular network topology. The physical ports associated with the
HA Architecture: Deployment Example
Limitations
The following limitations apply for
- Deployment
- HA can only be provisioned at the time of initial installation. Unable to show "metadata-from": No such page "_space_variables"does not offer a path for stand-alone (SA) to HA conversion.
- High Availability through a pair of Unable to show "metadata-from": No such page "_space_variables"devices only applies to SIP to SIP calls (excludes analog).
- HA ports connecting two devices are only allowed on the same subnet.
- The HA interface requires a single back-to-back Ethernet cable connecting the HA ports of the two Unable to show "metadata-from": No such page "_space_variables"devices.
- DHCP on the HA Interface is not supported.
- Geo Redundancy is not supported. The two Unable to show "metadata-from": No such page "_space_variables"devices must be co-located.
- Unable to show "metadata-from": No such page "_space_variables"devices only support floating IPs on the packet interfaces, not the HA or Admin interfaces.
- Unable to show "metadata-from": No such page "_space_variables"devices do not support card redundancy or port redundancy.
- HA can only be provisioned at the time of initial installation.
- Data Replication
- Call Features
- SIP recording, Video calls, and Music On Hold do not support switchover scenarios.
- Others
- SNMP Proxy from the Standby instance to the Active instance, so that SNMP requests always get a response regardless of which instance receives the request, is not supported.
- Using Service Discovery to find a RAMP instance when RAMP is configured for HA is not supported.
- The Edge Unable to show "metadata-from": No such page "_space_variables"does not support card redundancy or port redundancy.
Licenses
You must purchase an HA SKU to deploy HA on your system. Once you place an order through the Ribbon Partner Portal for HA functionality, Ribbon sends you an email that contains information on where to obtain the license associated with your system. You will receive one license for the HA pair.