Question

dhcp, vlans & ip range per room!

Asked by: krijntje

Hi,

I have to create a network schema for a school (250pcs) and I want for each class room its own subnet... -> so they'll be able to shut down the internet for a classroom!
But I have a problem: How do  I have to implement something like that...
Is this a good implementation or not at all?

ISP - router - switch (cisco)     - switch  class 1
                                             - switch  class 2
                                             - switch  class 3
                                             - switch  class 4
                                             - switch  5 (administration)


the dhcp server is connected to the switch no 5. Is it possible to implement this schema to add the ip helper-address to every VLAN/switch other than the admin vlan?

thanks in advance
Krekke

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Asked On
2007-01-05 at 21:35:55ID22113163
Tags

dhcp

,

vlan

,

ip

Topics

Miscellaneous Networking

,

Network Operations

,

TCP/IP

Participating Experts
3
Points
250
Comments
9

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Answers

 

by: AdamRobinsonPosted on 2007-01-05 at 21:48:33ID: 18257191

Are you managing this on a single domain?  Is there a central controller?  If so, what operating system is it running?  

 

by: krijntjePosted on 2007-01-05 at 23:44:59ID: 18257437

this is a single domain and it has a mixed environment.
Debian/windows/redhat but that doesn't matter because all clients/servers are using TCP/IP

 

by: yasirirfanPosted on 2007-01-06 at 00:07:35ID: 18257484

Hi
Yes you can create and Ip helper address to each VLAN, if you could send me the hardware details I can provide you more details.

You can design your VLAN Network in a following way

1) Create VTP domain in the administrator switch (for Eg School).

2) Create required VLANs and assign them the IP address ( Different subnets) and also add IP helper address
Config Example

interface Vlan2
 ip address 10.2.0.2 255.255.254.0
 ip helper-address 10.0.1.100
 ip helper-address 10.0.1.101
 
3)Create a trunking between the uplink ports from the main switch to edge switches.+

interface GigabitEthernet0/1
 switchport trunk encapsulation dot1q
 switchport mode trunk
4) Join all those swicthes to the VTP domain you created in the admin switch & make sure those swicthes are in VTP client mode.
 Make sure the switch you are using to create VLAN is Layer 3 capable .

If you need more assistance please let me know.

Cheers

Yasir

 

by: krijntjePosted on 2007-01-06 at 01:38:21ID: 18257597

thx yasir!

i'm familliar with vlans, trunking and VTP but not with the DHCP.. do you know howto configure the DHCP server? I use dhcpd (linux)
the edge switches will be cisco 2950 or something like that...

Thanks
Krekke

 

by: yasirirfanPosted on 2007-01-06 at 02:37:22ID: 18257711

Well create DHCP scopes for each vlan in the DHCP server, well I am not used to linux environment, as far in Windoes 2003 server we did configured DHCP scopes for each VLAN and ip helper address will be the DHCP server address.

Cheers

Yasir

 

by: stafiPosted on 2007-01-06 at 06:07:40ID: 18258066


one point is not clear: if you have 3 vlans ( 10.7.0.0/10.8.0.0/10.9.0.0) do you need 3 network adapters on the
dhcp server in order to scope each one of them ?

 

by: yasirirfanPosted on 2007-08-14 at 20:14:01ID: 19697050

no you don't need to have three network cards

20120131-EE-VQP-002

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