Using Vlans To Segregate Broadcast Domains; Configuration Example - Lenovo RackSwitch G8264 Application Manual

Using VLANs to Segregate Broadcast Domains

Configuration Example

1. Assign an IP address (or document the existing one) for each router and each
2. Assign an IP interface for each subnet attached to the switch.
3. Determine which switch ports and IP interfaces belong to which VLANs.
Devices
Default router
Web servers
Database servers
Terminal Servers
434
G8264 Application Guide for ENOS 8.4
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.
This section describes the steps used to configure the example topology shown in
Figure 40 on page 433.
server.
The following IP addresses are used:
Table 37.
Subnet Routing Example: IP Address Assignments
Subnet Devices
1 Default router
2 Web servers
3 Database servers
4 Terminal Servers
Since there are four IP subnets connected to the switch, four IP interfaces are
needed:
Table 38.
Subnet Routing Example: IP Interface Assignments
Interface Devices
IF 1 Default router
IF 2 Web servers
IF 3 Database servers
IF 4 Terminal Servers
The following table adds port and VLAN information:
Table 39.
Subnet Routing Example: Optional VLAN Ports
IP Interface
IP Addresses
205.21.17.1
100.20.10.2-254
131.15.15.2-254
206.30.15.2-254
IP Interface Address
205.21.17.3
100.20.10.1
131.15.15.1
206.30.15.1
Switch Ports
1 22
2 1 and 2
3 3 and 4
4 5 and 6
VLAN #
1
2
3
4