A‑Link and Private Networks
In addition to priv0, each system has A-Link networks to increase data-replication performance between the PMs. A-Link networks let you sync disks, shunt networks, migrate VMs, and sync fault-tolerant memory.
By default, priv0 also performs the role of an A-Link network under the following conditions:
- If the priv0 speed is at least 10 Gb
- If the priv0 speed is less than 10 Gb and the system contains no other 10 Gb ports (other than the management link). In this situation, you can remove the A-link role later as long as priv0 is not currently in use as an A-Link and is not the only remaining A-Link.
Priv0 cannot perform the A-Link role if its speed is less than 10 Gb and the system contains any 10 Gb ports (other than the management link). However, you can assign the A-Link role to priv0 at a later time.
The simplest priv0 consists of a single Ethernet cable (crossover or straight-through) that directly connects an embedded Ethernet port on each server. If a networking device other than a single Ethernet cable is used for priv0, see SplitSite Configurations.
Connect A-link networks between PMs either directly (that is, in the same manner that you connect priv0) or through a network switch.
Be sure to set up redundant A-Link networks.
The everRun installation software sets up priv0. It also sets up A-Link networks for any A-Link network ports that are physically connected at the time of the installation.
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