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BIG-IP Overview

BIG-IP® Reference Guide 1-5

sharing.) When you run the Setup utility as the last part of your initial

hardware installation and fill in the required fields, you are configuring the

base network. After you complete the Setup utility, you have, at the

minimum, the two default VLANs (external and internal), domain names,

and self IP addresses (both one true and floating as required) with netmask

and broadcast addresses. This base configuration enables you, among other

things, to access the BIG-IP from a remote host using SSH or HTTPS and in

this way gain access to both the command line interface and the graphic

Configuration utility.

At this point you may want to further configure the base network by

changing settings, segmenting the network into more interface-group

VLANs, adding VLANs with tagged interfaces, creating additional floating

self IP addresses, and performing link aggregation. These additional

configurations are solution-dependent and can be extensive, particularly if

you have more than two interfaces on your default internal VLAN. (If, for

example, you were hosting three customers, as in Figure 1.2, but were using

a single interface with an external switch, you would need to segment what

was originally the default internal VLAN into three separate tagged

VLANs.)

You may also re-run the Setup utility in its entirety or using its various

sub-utilities. For more information on these base configuration utilities, see

Chapter 2, Using the Setup Utility.

High-level network configuration

Once a base network exists and you have administrative access to the

BIG-IP and at least a default VLAN assignment for each interface, the next

step is to configure a network for the web servers to be load balanced.

Figure 1.2 shows the high-level network in non-italicized text. The network

includes the server nodes, the pools containing those nodes, and the virtual

servers that represent the pools to the client.

Just as the base network is built on the BIG-IP interfaces, the high-level

network is built on the load balancing pool. Until there is a pool, there are no

nodes to load balance. Once a pool exists, nodes come into existence as

members of that pool and can receive traffic through a virtual server. The

high-level network also includes the properties attaching to pools, virtual

servers, and nodes such as persistence (a pool property), and any pool

selection criteria as expressed in a rule. The high-level network can also

include proxies for SSL and akamaization, NATs, SNATs, and health

monitor associations for specific nodes or all nodes.

For detailed information on configuration refer to Chapter 4, Configuring

the High-Level Network, Chapter 7, bigpipe Command Reference, and

Chapter 8, Configuring SNMP.

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