NETGEAR GSM7248R - ProSafe Switch Manuale del proprietario

FSM73xx GSM73xx GMS72xxR –Shared access to the Internet across

Multiple routing VLANs using a Prosafe Firewall

This document describes how to:

-Create multiple routing VLANs

-Obtain Internet access on multiple VLANs using one Internet gateway

The procedure described can apply to most Layer 2 and Layer 3 Switches and VPN Firewall with new

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

Hardware differences among different models must be taken in consideration.

NOTE:

This document is not intended to illustrate how to perform full Layer3 separation, for which Access

Control Lists (ACLs) should be used.

Table of Contents

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

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

1 - Physical Setup............................................................................................................ 3

2 - Logical Setup .............................................................................................................. 3

3 - Configuring the Switch management IP address.................................................. 4

4 - Creating a routing VLAN ........................................................................................... 6

5 - Remove ports’ VLAN membership .......................................................................... 8

6 - Enable DHCP and create a DHCP pool per VLAN............................................. 10

8 –Configuring the switch default route..................................................................... 14

9 –Configuring static routes on the Internet Default Gateway............................... 16

10 –Saving the configuration....................................................................................... 17

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

GSM7352S

M1 M2 M3 M4

48T46T44T42T

47T45T43T41T

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41T 43T 45T 47T

2 4 6 8 10 12 14 16 18 20 22 24 38 40 42T 44T 46T 48T26 28 30 32 34 36

Default IP route : 192.168.2.254

Internet

VLAN4

192.168.4.1/24

VLAN3

192.168.3.1/24

VLAN2

192.168.2.1/24

192.168.2.x/24

DG 192.168.2.254 192.168.3.x/24

DG 192.168.3.1 192.168.4.x/24

DG 192.168.4.1

ProSafe VPN Wireless ADSL Gateway DGFV338

LOCAL

1 2 3 4 5 6 7 8 100

Link/ACT

LINK/ACT

100

INTERNET

TEST

MODEL

WLANDSL

PWR

192.168.2.254/24

____ VLAN 4: Ports 0/41 –0/48

PVID = 4

DHCP = 192.168.4.0/24

____ VLAN 3: Ports 0/21 –0/28

PVID = 3

DHCP = 192.168.3.0/24

____ VLAN 2: Ports 0/1 –0/8

PVID = 2

DHCP = 192.168.2.0/24

GSM7xxx - Shared access to the Internet across Multiple Routing VLANs using a Prosafe Firewall

DGFV338

Static routes:

192.168,3.0 255.255.255.0 192.168.2.1

192.168.4.0 255.255.255.0 192.168.2.1

1 - Physical Setup

1x GSM7352S Prosafe Layer3 - Firmware 7.2.1.6

3x Windows XP Computers (1 on each VLAN)

1 x Prosafe Firewall Router DGFV338

2 - Logical Setup

DGFV338:

LAN IP 192.168.2.254/24

DHCP enabled (192.168.2.0/24, DG 192.168.2.1, DNS 192.168.2.254)

Static routes:

192.168.3.0 255.255.255.0 192.168.2.1

192.168.4.0 255.255.255.0 192.168.2.1

GSM7352S:

VLAN1: Management VLAN

IP 192.168.1.1

DG 192.168.1.254

DHCP disabled

VLAN2:

IP 192.168.2.1

DHCP enabled on DGFV338

(192.168.2.0/24 , DG 192.168.2.1, DNS 192.168.2.254)

VLAN3:

IP 192.168.3.1

DHCP enabled (192.168.3.0/24, DG 192.168.3.1, DNS 192.168.2.254)

VLAN4:

IP 192.168.4.1

DHCP enabled (192.168.4.0/24, DG 192.168.4.1, DNS 192.168.2.254)

3 - Configuring the Switch management IP address

The Management IP address (by default on VLAN1) can be setup using the CLI (Command Line

Interface).

The CLI should be access via HyperTerminal (or similar applications) using the Console cable

included in the box.

---------------------------------------------------------------------------------------------------------------------------------

User: admin

Password:

(FSM7352S) >enable

Password:

(GSM7352S) #

(GSM7352S) #network protocol none

Changing protocol mode will reset ip configuration.

Are you sure you want to continue? (y/n)y

(GSM7352S) #network parms 192.168.1.1 255.255.255.0 192.168.1.254

(GSM7352S) #show network

IP Address..................................... 192.168.1.1

Subnet Mask.................................... 255.255.255.0

Default Gateway................................ 192.168.1.254

Burned In MAC Address.......................... 00:1F:33:E6:81:A5

Locally Administered MAC Address............... 00:00:00:00:00:00

MAC Address Type............................... Burned In

Network Configuration Protocol Current......... None

Management VLAN ID............................. 1

Web Mode....................................... Enable

Java Mode...................................... Enable

(GSM7352S) #

---------------------------------------------------------------------------------------------------------------------------------

When a Management IP address is configured, the Web Interface of the switch can be accessed.

It will possible to modify the Management IP configuration via System –Management –IP

configuration including the IP address, Subnet Mask, Default Gateway and Management VLAN

ID.

4 - Creating a routing VLAN

To create routing VLANs access the VLAN Routing Wizard via Routing VLAN.

1)Type the VLAN ID (in the example the VLAN ID is 2)

2)Specify the IP address (192.168.2.1) and the subnet mask (255.255.255.0)

3)Expand the Port list by clicking on Unit 1

4)Select the correct option for each port that will be member of the VLAN

Three options are available:

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

- Untagged membership (U)

- Tagged membership (T)

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

one is set. For this scenario we will be using the U (Untagged) option on all the ports.

5)Apply the changes

Once all the relevant VLANs have been added –a summary can be found in the VLAN routing

section of the menu.

In this case VLAN 2, 3, and 4 have been added to the configuration.

A new Virtual port is assigned to each VLAN.

5 - Remove ports’ VLAN membership

To remove port memberships from a VLAN, the VLAN configuration must be accessed via

Switching –VLAN –VLAN Membership.

In order to remove a port from the VLAN memberships just continuously click on the gray box

underneath the port number, until no symbol appears as in the picture below.

The VLAN Status page will show the update membership for all the VLAN

In this scenario we require to remove from VLAN1, membership to those ports that appear in any

of the other VLANs to ensure total VLAN separation.

When setting a routing VLAN the PVID (Port VLAN ID) is automatically set to the VLAN ID.

This can be confirmed using the Port PVID Configuration page.

6 - Enable DHCP and create a DHCP pool per VLAN

The DHCP server can be enabled via the System –Services –DHCP Server Configuration page.

To create a new DHCP pool, access the DHCP Pool Configuration page:

1)Select the Pool name - for ease of configuration this might be same as the VLAN name if

the pool will be associate toa VLAN

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