NETGEAR FS728TPv1 - ProSafe 24 Port 10/100 Smart... Stücklistenhandbuch

GS700TS FS700TS – Access to the Internet on multiple VLANS using Multi-

Homing

This document describes how to obtain Internet access on multiple VLANs using one Internet

gateway capable of managing multiple IP subnets (Multi-homing).

The procedure described can apply to all the Smart Switches and VPN Firewall with new Web

Interface (defined as the one with the Menus appearing horizontally on top).

Table of Contents

VLAN-Definition...........................................................................................................................2

Notes when setting-up VLANs .....................................................................................................2

Multi-Homing (extract from the DGFV338 Help page) ..................................................................3

Physical Setup ............................................................................................................................3

Logical Setup ..............................................................................................................................3

DGFV338 Primary LAN ...............................................................................................................4

DGFV338 Secondary VLAN ........................................................................................................5

Smartswitch VLAN creation .........................................................................................................6

Assigning Port membership to a VLAN ........................................................................................7

Assigning a PVID to a port...........................................................................................................8

Testing the scenario ..................................................................................................................10

Further notes.............................................................................................................................10

VLAN-Definition

VLANs are logical subgroups within a Local Area Network (LAN), which combine user stations,

and network devices into a single unit, regardless of the physical LAN segment to which they are

attached. VLANs allow network traffic to flow more efficiently within subgroups. VLANs use

software to reduce the amount of time it takes for network changes, additions, and moves to be

implemented.

Notes when setting-up VLANs

• A VLAN does not have a minimum number of port

• VLANs work at the OSI Layer 2

• A VLAN can be created per unit, device or via logical connection/combination

• Broadcast and Multicast traffic is transmitted only in the VLAN in which traffic is generated.

• To allow traffic between VLAN a device working at protocol level (Layer 3) is required

MO DEL

GS724T

24 Port 10/100/1000 Mbps Smart Switch

Rese t PWR

LINK/ACT

SPD

FDX

Auto

Upli nk



1 3 5 7 9 11 13 15 17 19 21 23T

2 4 6 8 10 12 14 16 18 20 22 24T

23F 24F

SFP

LINK

SFP

LINK

Factory

Defaults

LINK/ACT

SPD

FDX

Yellow = 10Mbps

Green = 100Mbps

ProSafe VPN Wireless ADSL Gateway

DGFV338

LOCAL

12345678

100

Link/ACTLINK/ACT

100

INTERNET

TEST

MODEL

WLANDSL

PWR

Multi-Homing (extract from the DGFV338 Help page)

N etw o r k C on fi gu ra ti o n

Secondary LAN IP Setup

If you have computers using different IP networks in the LAN, (for example:

172.16.2.0, 10.0.0.0), then you can add “aliases” to the LAN port and give

computers on those networks, access to the Internet.

Availa

ble Secondary LAN IPs

The tables lists the secondary LAN IP addresses added to the router.

IP Address: The IP address alias added to the LAN port of the router. This is the

gateway for computers that need to access the Internet.

Subnet Mask:

IPv4 Subnet Mask.

Action/Edit:

Click to make changes to the selected entry.

Select All:

Selects all the entries in the

Available Secondary LAN IPs

table.

Delete: Deletes selected entries from the Available Secondary LAN IPs table.

Add Secondary LAN IP Address

To add a secondary LAN IP address, type in the IP Address and the Subnet

Mask in the respective text fields and click Add.

Note: Additional IP addresses cannot be configured in the DHCP server. The

hosts on the secondary subnets must be manually configured with the IP

addresses, gateway IP and DNS server IPs.

IMPORTANT!

Make sure the secondary IP addresses are different from the LAN, WAN, and

any other subnet attached to this router.

Example:

ADSL IP address: 10.0.0.1 with subnet 255.0.0.0

WAN Ethernet IP address: 20.0.0.1 with subnet 255.0.0.0

LAN IP address: 192.168.1.1 with subnet 255.255.255.0

Secondary LAN IP: 192.168.20.1 with subnet 255.255.255.0

Physical Setup

1x GS724TS Prosafe Smartswitch - Firmware 3.1.0.1

2x Windows XP Computers (2 on each VLAN)

1 x DGFV338 Prosafe Firewall Router (Router firmware 3.4.0.19)

Logical Setup

GS724TS:

Management IP on VLAN1 (192.168.0.239)

DGFV338 :

Primary range 192.168.0.1/24 (DHCP enabled)

Seconday range 172.16.0.1/24 (DHCP not enabled)

PC1 – VLAN20 – 192.168.0.2/24

PC2 – VLAN30 – 172.16.0.2/24

VLAN20: Ports 0/5 and 0/6 and 0/9 (PVID 20 for all the ports)

VLAN30: Ports 0/7 and 0/8 and 0/9 (PVID 30 for all the ports)

VLAN40: Port 0/5 – 0/9 (PVID 40 only for port 0/9)

DGFV338 Primary LAN

The Primary LAN settings can be defined on the GUI of the DGFV338 (Network Configuration,

LAN Setup).

If DHCP is required ensure that the correct Starting IP address and Ending IP address are

configured including the DNSs settings.

DGFV338 Secondary VLAN

In order to add a Secondary LAN to the DGFV338 the Multi-homing option should be used.

This can be accessed via the GUI (Network configuration, LAN Setup, Multi-Homing)

PCs with an IP address within this range will need the IP address, Default Gateway and DNS

servers (if different from the Default Gateway) manually set.

Smartswitch VLAN creation

VLAN are created on the Smartswitch via the GUI (Switching, VLAN, Basic, VLAN configuration).

To complete the scenarion 3 VLAN will need to be created.

The two pictures below show the creation of VLAN20, and the results of the creation of all the

VLAN required to complete the scenario (VLAN20, 30, 40)

Assigning Port membership to a VLAN

Port membership can be assigned via the GUI (Switching, VLAN, Advanced , VLAN

membership).

Three options are available:

- No membership (no simbol appearing in the gray box underneath the port number)

- Untagged membership (U)

- Tagged membership (T)

In order to browse through the options just continuosly click on the gray box until the correct one

is set.

For this scenarion we will be using the U (Untagged) option on all the ports.

Assigning a PVID to a port

The PVID (Port VLAN ID) is assigned to each port via the GUI (Switching, VLAN, Advanced, Port

PVID configuration).

It is important that the PVID matches the VLAN a port is member of, unless such port belongs to

multiple VLANs (in which case the PVID must still be set and be unique, but can match any of the

VLAN IDs).

In our scenario the following PVID will apply:

Ports 0/5 - 0/6 (PVID 20)

Ports 0/7 - 0/8 (PVID 30)

Port 0/9 (PVID 40)

The below pictures show how after clicking on apply (for all 3 VLANs PVID) we obtain the correct

settings:

Testing the scenario

In order to test the scenario:

- Connect one PC with IP address in the 192.168.0.0/24 range to port 0/5 or 0/6

- Connect one PC with IP address in the 172.16.0/0/24 range to port 0/7 or 0/8

- Connect the Prosafe firewall to port 0/9

It should now be possible for each PC to ping the IP address of the Prosafe Firewall within the

same IP subnet, and also connect to the Internet (assuming the DNS settings are correctly set via

DHCP or manual configuration)

Further notes

The solution illustrated above allows multiple LANs to access the Internet but does not create

Layer 3 separation, whilst Layer 2 VLAN separation is guaranteed by the switch.

To obtain full Layer 3 separation a Layer 3 devices with ACL capability must be used.

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