Blade ICE G8124-E manual Using VLANs to Segregate Broadcast Domains

BLADEOS 6.5.2 Application Guide

Using VLANs to Segregate Broadcast Domains

If you want to control the broadcasts on your network, use VLANs to create distinct broadcast domains. Create one VLAN for each server subnet, and one for the router.

Configuration Example

This section describes the steps used to configure the example topology shown in Figure 25 on page 221.

1.Assign an IP address (or document the existing one) for each router and each server.

The following IP addresses are used:

Table 20 Subnet Routing Example: IP Address Assignments

Subnet	Devices	IP Addresses
1	Default router	205.21.17.1
2	Web servers	100.20.10.2-254
3	Database servers	131.15.15.2-254
4	Terminal Servers	206.30.15.2-254

2.Assign an IP interface for each subnet attached to the switch.

Since there are four IP subnets connected to the switch, four IP interfaces are needed:

Table 21 Subnet Routing Example: IP Interface Assignments

Interface	Devices	IP Interface Address
IF 1	Default router	205.21.17.3
IF 2	Web servers	100.20.10.1
IF 3	Database servers	131.15.15.1
IF 4	Terminal Servers	206.30.15.1

222 ￿ Chapter 15: Basic IP Routing BMD00220, October 2010