Question

Configureing router on a stick Cisco 1841 router + 2960x2

Asked by: mselgamal

I'm basically trying to configure my router to provide inter-vlan communication. This is for studying purposes for CCNA and is not in a company setting.

So far i have the switches configured with the correct vlans, vlan 1(default) vlan 2 and vlan 50

So i would like to use the cisco 1841 for provide inter-vlan communication, plus i also want the cisco 1841 to be the DHCP server.

What i have done so far:

I used a 133.16.0.0 /19 network for the DHCP server. Then i gave each sub-interface on the router a different subnet ip address.


Default-router ip is 133.16.0.1

I gave fa0/0 no ip address
 
example sub-interface config:

fa0/0.1
encapsulation dot1q 1
ip address 133.16.32.100 255.255.224.0

Now here is my question, Do i need to setup multiple DHCP pools for each vlan/subnet on the cisco 1841 ??


 Thanks for any input!

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Asked On
2009-09-07 at 15:40:55ID24713474
Topics

Dynamic Host Configuration Protocol (DHCP)

,

Network Routers

,

Network Switches & Hubs

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: rochey2009Posted on 2009-09-07 at 16:11:24ID: 25277775

Each vlan/subnet will have a different default gateway and possibly other parameters.
Yes, you will need to create a separate DHCP pool for each ip subnet vlan/subnet.
Also make sure you exclude the gateway addresses from dhcp.

 

by: rochey2009Posted on 2009-09-07 at 16:20:29ID: 25277804

Router(config)# ip dhcp excluded-address <low-address> <high-address>

Router(config)# ip dhcp pool name <name>
Router(dhcp-config)# network <network-number> [mask | /prefix-length]
Router(dhcp-config)# default-router <address>
Router(dhcp-config)# lease {days [hours][minutes] | infinite}

http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfdhcp.html#wp1000985 for further parameters

 

by: mselgamalPosted on 2009-09-07 at 19:06:12ID: 25278263

Thanks this clarified it for me. I'll give it a try and if i have more issues will post again!.



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