Specifications

44 Barracuda Link Balancer Administrator’s Guide
No External Firewalls
Figure 4.5 shows two Barracuda Link Balancers with the firewall enabled. As in the other
deployment examples, the LAN IP addresses of the two Barracuda Link Balancers and the VRRP
virtual IP address must all be on the same subnet. Note that only in this example the VRRP virtual IP
address is the default gateway for devices on the LAN.
If you are adding a second Barracuda Link Balancer to a network where the gateway of the client
devices were already configured to use the LAN IP address of the first Barracuda Link Balancer, you
can assign a new LAN IP address to that Barracuda Link Balancer, and use its original LAN IP
address as the VRRP virtual IP address.
Figure 4.5: Deployment Example - No External Firewall
Creating a Cluster
These instructions describe how to deploy a pair of Barracuda Link Balancers in a cluster. You can
also find detailed configuration steps and descriptions of clustering parameters in the online help of
the Web interface.
Prior to clustering the Barracuda Link Balancers, you should first place the systems into their
production IP address range. This will allow you to avoid having to reconfigure the cluster later
because of an IP address change.