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How to configure Create VLANs?

Posted on 2011-09-09
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Last Modified: 2012-05-12
I have a task to segregate My Network with 5 VLANs. Resources i have following:

1. Cisco Layer2 Catalyst Switches 2960 4 NOs.
2. Cisco Layer3 Catalyst Switch 3560 2 NOs.
3.  Fortigate Firewall 60B

Requirement :

VLAN 1 IP- 10.50.3.0/24
VLAN2 IP- 10.50.4.0/24
VLAN3 IP- 172.19.121.0/24
VLAN4 IP- 172.18.16.0/22
VLAN5 IP- 172.19.248.0/24

VLAN 5 will act as Server Farm for VLAN 3 & 4

Please assist me with step by step command or guide to setup

Already i have setup Fortigate with Network IP 10.50.3.0 as a flat network and all servers and client are using same network ID i.e. 10.50.3.0/24
Now i need to split my network.

please suggest!


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Question by:aloknet21
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4 Comments
 
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Expert Comment

by:jmeggers
ID: 36510645
In the more recent versions of Cisco IOS on switches, when you assign a switch port to a VLAN, if the VLAN does not already exist, it is created.  Here are the steps to assign to a VLAN:

configure term
interface fa0/1
switchport
switchport mode access
switchport access vlan 10

If you need a VLAN interface with an IP address on the switch for the switch to route between VLANs, then configure:

interface vlan 10
ip address a.b.c.d 255.255.255.0

It's possible you may need to "no shut" the interface but usually not.
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LVL 26

Expert Comment

by:Soulja
ID: 36510731
On 3560:
conf t
ip routing
interface vlan 1
ip address 10.50.3.254 255.255.255.0
no shut

interface vlan 2
ip address 172.50.4.254 255.255.255.0
no shut

interface vlan 3
ip address 172.19.121.254 255.255.255.0
no shut

interface vlan 4
ip address 172.18.16.254 255.255.255.0
no shut
 
interface vlan 5
ip address 172.19.254.254 255.255.255.0
no shut

exit

vlan 2
vlan 3
vlan 4
vlan 5

interface gix/x   (connected to 2960)
switchport trunk encapsulation dot1q
swithport mode trunk

ip route 0.0.0.0 0.0.0.0 fortgateipaddress

interface fax/x (connected to fortigate)
switchport access vlan 1
swtchport mode access

On 2960 switch


vlan 2
vlan 3
vlan 4
vlan 5

ip default gateway 10.50.3.254

int gix/x  (connected to 3560)
switchport trunk encapsulation dot1q
switchport mode trunk





On Fortigate


You need routes to the other 4 vlans so:

ip route 10.50.4.0 255.255.255.0 10.50.3.254
ip route 172.19.121.0 255.255.255.0 10.50.3.254
ip route 172.18.16.0 255.255.255.0 10.50.3.254
ip route 172.19.248.0 255.255.255.0 10.50.3.254
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LVL 26

Expert Comment

by:Soulja
ID: 36510764
Once you do the config above, just assign ports to the vlan or your choice for the pc's and servers.

conf t
interface x/x
switchport access vlan x
switchport mode access

Then ensure you configure the correct ip settings on the servers and pc's to be on the same subnet and point to the correct vlan inteface for their gateway.

For DCHP, just add an ip helper to the Vlan Interfaces where the dhcp server does not sit.

For example, if the dhcp server sits on vlan 1 then add the ip helper to the other vlan interfaces, not interface vlan 1.

interface vlan x
ip helper-address x.x.x.x (address of dhcp server)

Make sure you have the scopes created for each vlan on the dhcp server.
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Soulja earned 2000 total points
ID: 36523314
Author, are you out there? Update?
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