asked on

DHCP WITH VLANS

I have 2800 cisco router with 2960 switch I want to create 7 vlans and want to use the router as dhcp can someone guide me step by step how to configure this.

Thanks for all

Member_2_4839798

Hey,

VLANS - http://www.cisco.com/en/US/tech/tk389/tk689/technologies_configuration_example09186a008009478e.shtml

DHCP Running on Cisco Router - http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfdhcp.html

Member_2_4839798

A tip if you do not have 7 interfaces for each of your VLANS, you can use VLAN Encapsulation on an interface, and assign these gateway IP's to each encapsulated interface.

Member_2_4839798

P.S Reading this material will really help you understand the steps required appose to just copy and pasting comments. If you get stuck just let me know.

Member_2_4839798

Given the silence I have written and tested the below configs for you.

Router, based and working on a 2811 Router using interface 0/0.

hostname Router
!
!
!
!
!
ip dhcp pool VLAN11
 network 10.11.11.0 255.255.255.0
 default-router 10.11.11.1
ip dhcp pool VLAN12
 network 10.12.12.0 255.255.255.0
 default-router 10.12.12.1
ip dhcp pool VLAN13
 network 10.13.13.0 255.255.255.0
 default-router 10.13.13.1
ip dhcp pool VLAN14
 network 10.14.14.0 255.255.255.0
 default-router 10.14.14.1
ip dhcp pool VLAN15
 network 10.15.15.0 255.255.255.0
 default-router 10.15.15.1
ip dhcp pool VLAN16
 network 10.16.16.0 255.255.255.0
 default-router 10.16.16.1
ip dhcp pool VLAN17
 network 10.17.17.0 255.255.255.0
 default-router 10.17.17.1
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/0.11
 encapsulation dot1Q 11
 ip address 10.11.11.1 255.255.255.0
!
interface FastEthernet0/0.12
 encapsulation dot1Q 12
 ip address 10.12.12.1 255.255.255.0
!
interface FastEthernet0/0.13
 encapsulation dot1Q 13
 ip address 10.13.13.1 255.255.255.0
!
interface FastEthernet0/0.14
 encapsulation dot1Q 14
 ip address 10.14.14.1 255.255.255.0
!
interface FastEthernet0/0.15
 encapsulation dot1Q 15
 ip address 10.15.15.1 255.255.255.0
!
interface FastEthernet0/0.16
 encapsulation dot1Q 16
 ip address 10.16.16.1 255.255.255.0
!
interface FastEthernet0/0.17
 encapsulation dot1Q 17
 ip address 10.17.17.1 255.255.255.0
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end

Open in new window

Switch, based and working on a 2960

hostname Switch
!
!
!
interface FastEthernet0/1
 switchport mode trunk
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
 switchport access vlan 11
!
interface FastEthernet0/12
 switchport access vlan 12
!
interface FastEthernet0/13
 switchport access vlan 13
!
interface FastEthernet0/14
 switchport access vlan 14
!
interface FastEthernet0/15
 switchport access vlan 15
!
interface FastEthernet0/16
 switchport access vlan 16
!
interface FastEthernet0/17
 switchport access vlan 17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet1/1
!
interface GigabitEthernet1/2
!
interface Vlan1
 no ip address
 shutdown
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
end

Open in new window

Interface 0/1 is trunked to the routers 0/0 interface, interfaces 0/11-17 are using Vlan 11-17 based on port number.

I have tested this using 7 DHCP enabled clients successfully. Just copy and paste the config into your device after the "conf t" command.

lexmark1

ASKER

Many thanks MichaelIanClaridge,

It works with me after I issued no shutdown command under interface 0/0.
But do I need to create vlans on the switch or not and how can prevent vlan11 talks to vlan12 because I don't want vlans talk to each other.

My appreciate.

Member_2_4839798

Hey!

Yea sorry, no shut must have been missing.
The configs I gave you included 7 VLANS :)

As ports 11 to 17 are all on seperate VLANS there shouldn't be any inter VLAN comms.

All the best

MC

Member_2_4839798

Oooops, that's incorrect! Sorry. Can't remember off the top of my head and I have man flu and can't think. Ill get back to you later if you haven't found a solution by then :)

Member_2_4839798

Well if that is what you want, the easiest way is to remove the default gateways, you can copy and paste the below which will remove the default-router IP's.

hostname Router
!
!
!
!
!
ip dhcp pool VLAN11
 network 10.11.11.0 255.255.255.0
no default-router 10.11.11.1
ip dhcp pool VLAN12
 network 10.12.12.0 255.255.255.0
no default-router 10.12.12.1
ip dhcp pool VLAN13
 network 10.13.13.0 255.255.255.0
no default-router 10.13.13.1
ip dhcp pool VLAN14
 network 10.14.14.0 255.255.255.0
no default-router 10.14.14.1
ip dhcp pool VLAN15
 network 10.15.15.0 255.255.255.0
no default-router 10.15.15.1
ip dhcp pool VLAN16
 network 10.16.16.0 255.255.255.0
no default-router 10.16.16.1
ip dhcp pool VLAN17
 network 10.17.17.0 255.255.255.0
no default-router 10.17.17.1
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/0.11
 encapsulation dot1Q 11
 ip address 10.11.11.1 255.255.255.0
!
interface FastEthernet0/0.12
 encapsulation dot1Q 12
 ip address 10.12.12.1 255.255.255.0
!
interface FastEthernet0/0.13
 encapsulation dot1Q 13
 ip address 10.13.13.1 255.255.255.0
!
interface FastEthernet0/0.14
 encapsulation dot1Q 14
 ip address 10.14.14.1 255.255.255.0
!
interface FastEthernet0/0.15
 encapsulation dot1Q 15
 ip address 10.15.15.1 255.255.255.0
!
interface FastEthernet0/0.16
 encapsulation dot1Q 16
 ip address 10.16.16.1 255.255.255.0
!
interface FastEthernet0/0.17
 encapsulation dot1Q 17
 ip address 10.17.17.1 255.255.255.0
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end

Open in new window

Like I said previously I have created 7 VLANs on the switch, and encapsulated these on the router, just change the switchport assignments to add additional ports on the switch.

I hope this helps.

All the best.

MC

lexmark1

ASKER

Thanks alot I was thinking about access list I did it works with me. But can I ask you how can I do this with mikrotik router not the 2800 cisco one.

My appreciate

ASKER CERTIFIED SOLUTION

Member_2_4839798

membership

Create a free account to see this answer

Signing up is free and takes 30 seconds. No credit card required.

See answer