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New Member

Vlan configuration


We have 4 floor around 600 users.

Want to configure VLAN for each floor.

Have the following equipments:

1. Core switch - Catalyst 4006

2. Catalyst - 2950 in each switch

3. MS DHCP server is connected to Core switch

Anyone help me how to configre VLAN with this scenario

Advance thanks for your co-operation



Network Administrator


Re: Vlan configuration

Hi Reza,

You can create 5 VLANS, one for management and one vlan for each floor. Your core switch will be doing the inter vlan routing.

Configure your 4006 as the VTP server and give a domain name.

Creat SVI's at the core and assign IP address according to your ip schema.

Configure trunks between the 2950's and the core switch for VTP propogation.

assign ports on the switches to a particular vlan

Check out the following links

HTH, rate if it does


Re: Vlan configuration

Hi Reza,

You have to configure different vlan to segregate the users. You can define the vlans based on the departments that you have. There are twi ways that you can deploy vlans on your network.

1. Manually configuring Vlans on each switch and then connect them using trunk.

2. Using VTP configuration on the core switch then all the vlans will be dynamically propogated to the downstream switches using the.

Another important factor here is to check is for routing among the vlans. Please check whether you have a routing module in Cat4006 switch will will do the routing among the vlansOtherwise we have to use an external router to do the inter-vlan routing.Please paste" show version" from the 4006.

Here are the steps to start with on Cat4006

A. Configruing VTP on the core switch

Set vtp domain

set vtp mode server --> which is defualt as server

B. Confgure the VTP on 2950

Switch#Vlan database

VTP doamin

VTP mode client

C. Configure the trunks between 4006 and 2950.

D. Configure the vlans the you want on 4006 and they will be propogated to 2950 switches automatically.

E. Configure the Inter-vlan routing on 4006.

Again Please paste the show version to check the inter-vlan routing pasrt for your network. then we will suggest you to carry it out.

HTH, Please rate if it does.

-amit singh

New Member

Re: Vlan configuration

Hi Amit

Thanks for your response.

Following as per your instructons.

Please find the show version as follows:

swcore> (enable) sh ver

WS-C4006 Software, Version NmpSW: 8.4(1)GLX

Copyright (c) 1995-2004 by Cisco Systems, Inc.

NMP S/W compiled on May 28 2004, 15:33:29

GSP S/W compiled on May 28 2004, 15:00:14

System Bootstrap Version: 5.4(1)

Hardware Version: 5.0 Model: WS-C4006 Serial #: FOX06360RE6

Mod Port Model Serial # Versions

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


1 2 WS-X4013 JAE0638018Q Hw : 5.0

Gsp: 8.4(1.0)

Nmp: 8.4(1)GLX

2 48 WS-X4148-RJ JAE06380257 Hw : 3.1

4 48 WS-X4448-GB-RJ45 JAB080908K5 Hw : 1.1


Module Total Used Free Total Used Free Total Used Free

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

1 65536K 40205K 25331K 16384K 9742K 6642K 480K 315K 165K

Uptime is 146 days, 2 hours, 32 minutes

swcore> (enable)

Waiting for your next valuable response



Re: Vlan configuration

Hi Reza,

Sorry, You dont have a routing module installled in your switch. This is a pure layer 2 switch. In this case we have to use an external router for the inter-vlan routing part.Look for a router which has a fastethernet interface and you have an IP Plus feature set running on it. IP Plus featureset IOs supports encapsulation on it.

Here is what we need to do on the router.This example shows how to enable IP routing on the router, create two subinterfaces, and specify the encapsulation, VLAN number, and IP address for each subinterface:

Cisco7505#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Cisco7505(config)#ip routing

Cisco7505(config)#interface fastethernet2/0.100

Cisco7505(config-subif)#encapsulation isl 100

Cisco7505(config-subif)#ip address

Cisco7505(config-router)#interface fastethernet2/0.200

Cisco7505(config-subif)#encapsulation isl 200

Cisco7505(config-subif)#ip address



Let me know which router you have and I will take it from there.

HTH, Please rate if it does.

-amit singh

New Member

Re: Vlan configuration

Hi Amit

Thanks for your response.

We have one Layer 3 switch of another company named ALLIED TELESYN Model: 9724TS which is directly connected to Servers and Catalyst 4006.

Is it possible to implement VLAN among ATI switch and Cisco catalyst.

If possible, request you to provide the procedure

Thanks again


Re: Vlan configuration

Hi Reza,

In that case we have to do the layer3 routing at 9724TS switch. Here is the procedure :

1. Create a trunk on Cat4006 switch.

2. Create trunk on the Allied telesyn switch.

3. Enable IP routing on Aliied telesyn switch for all the vlans that you have on you access layer switch. You have to create SVI (Siwtch virtual interface-Layer3 interfaces) on the switch and it will do the routing. Search fo Ipif on this PDF and you will be able to configure the layer3 interfaces.

HTH, Please rate if it does.

-amit singh