Vlan-Definition; Notes When Setting-Up Vlans - NETGEAR GSM7248R Supplement Manual

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
GSM7xxx - Shared access to the Internet across Multiple Routing VLANs using a Prosafe Firewall
192.168.2.x/24
DG 192.168.2.254
VLAN2
192.168.2.1/24
1 3 5 7 9
2 4 6 8 10
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
192.168.3.x/24
DG 192.168.3.1
VLAN3
192.168.3.1/24
11 13 15 17 19 21 23 25 27
12 14 16 18 20 22 24 26 28
ProSafe VPN Wireless ADSL Gateway
INTERNET
PWR 100
1 2 3
TEST DSL LINK/ACT WLAN
192.168.4.x/24
DG 192.168.4.1
VLAN4
192.168.4.1/24
29 31 33 35 37 39 41T 43T 45T
30 32 34 36 38 40 42T 44T 46T
192.168.2.254/24
MODE L DGFV 338
LOCAL
100
4 5 6 7 8
Link/ACT
VLAN 2: Ports 0/1 – 0/8
____
PVID = 2
DHCP = 192.168.2.0/24
VLAN 3: Ports 0/21 – 0/28
____
PVID = 3
DHCP = 192.168.3.0/24
VLAN 4: Ports 0/41 – 0/48
____
PVID = 4
DHCP = 192.168.4.0/24
M 1 M 2 M 3 M 4
GSM7352S
47T
41T 43T 45T 47T
Default IP route : 192.168.2.254
42T 44T 46T 48T
48T
Internet
2