cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements
Join Customer Connection to register!
1890
Views
5
Helpful
3
Replies
Shahzaib Khan
Beginner

VLAN Configuration USING MS DHCP Server

Dear Experts,

I am very biggener to Cisco World. I am going to creat VLANs very 1st time therefore for test purpose I have following simple scnerio.

I have created 2 VLANs , VLAN2 and VLAN3 on Cisco Catalyst 2960 series switch. Ports 1-12 is assigned to VLAN2 and Ports 13-24

are assiged to VLAN3. Now I have configured DHCP on Microsoft Server 2003 defining 2 scopes with following configurations.

Scope 1 for VLAN 2--- Range is 172.16.0.17 to 172.16.0.30   with subnet mask=255.255.255.240 . Server IP address 172.16.0.17

( Note: Address 172.16.0.17 is excluded from dhcp server Scope 1 and give to the MS server itself)

Scope 2 for VLAN 3----Range is  172.16.0.33 to 172.16.0.46 with subnet mask=255.255.255.240 .

Now in Cisco 2960 series switches, under Vlan 2 and Vlan 3, I have following configurations...

interface Vlan2

ip address 172.16.0.30 255.255.255.240

ip helper-address 172.16.0.17

interface Vlan3

ip address 172.16.0.46 255.255.255.240

ip helper-address 172.16.0.17

Now the problem is when i connect a client computer to any port from 1-12, It gets correct IP address from Scope 1 but when I connect a computer to any port from 13-24, it does not get the ip address. Can anyone help me in this regard please.

Further I want to do inter VLAN comunication as well for that purpose i Have an  ISR 2900 series router. What further configuration i will have to do on router for inter vlan communication. Please help me out...

Regards

Shahzaib Khan

1 ACCEPTED SOLUTION

Accepted Solutions

It's not possible. For inter-VLAN communication and having multiple VLAN interfaces, you'll need a Layer 3 switch or a router.

You should create a VLAN trunk between the 2960 and the ISR, create the subinterfaces on the router, and also configure the IP helper there.

View solution in original post

3 REPLIES 3
Andras Dosztal
Participant

You can't have more then 1 VLAN interface in up on a 2960, once you enable one, the previously enabled will be shut down. You'll need an L3 switch like the 3560, or use the 2900 router for DHCP Relay functions as well.


Sent from Cisco Technical Support Android App

@ Andras Dosztal

So do you mean that According to my snerio, VLAN comunication is not pissible in Layer 2 Cisco Switches??

It's not possible. For inter-VLAN communication and having multiple VLAN interfaces, you'll need a Layer 3 switch or a router.

You should create a VLAN trunk between the 2960 and the ISR, create the subinterfaces on the router, and also configure the IP helper there.

View solution in original post