Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual download pdf (Page 42)

ServerIron ADX Firewall Load Balancing Guide 31

53-1002436-01

Configuration examples with Layer 3 routing support

DRAFT: BROCADE CONFIDENTIAL

Basic FWLB with multiple sub-nets and multiple

virtual routing interfaces

Figure 8 (IPv4) and Figure 8 (IPv6) show an example of a basic FWLB configuration in which

multiple IP sub-net interfaces are configured on each ServerIron ADX. On each ServerIron ADX, the

client or server is in one sub-net and the firewalls are in another sub-net. The ports connected to

the firewalls are configured in a separate port-based VLAN. The ServerIron ADX’s IP interface to the

firewalls is configured on a virtual routing interface associated with the ports in the VLAN.

The client and server in this example are each configured to use their locally attached ServerIron

ADX as the default gateway, instead of using a firewall interface. Therefore, you do not need to

configure static MAC entries for the firewalls on the ServerIron ADX.

IPv4 example for FWLB with multiple sub-nets and virtual routing interfaces

The following sections show the CLI commands for configuring the basic IPv4 FWLB

implementation in

Figure 8.

FIGURE 8 Basic IPv4 FWLB in multiple sub-nets using multiple routing interfaces

SI-A

Layer 3

Firewall-2

Layer 3

Firewall-1

Client

IP:10.10.7.15

Gtwy: 10.10.7.101

Virtual Routing

Interface 1

10.10.1.111

Internal

ServerIron

External

ServerIron

Server

Virtual Routing

Interface 2

10.10.7.101

Virtual Routing

Interface 1

10.10.2.222

IP:10.10.5.40

Gtwy: 10.10.5.101

Virtual Routing

Interface 2

10.10.5.101

SI-A

SI-B

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