Best way to subnet - Advice

Unanswered Question
May 11th, 2007


I've got over 30 offices dotted up and down the country. I need to create two additional vlans in each site. Currently I have all the offices connected to each other via MPLS from a third party. What I'd like to do is run OSPF in each office, so bearing this in mind would it be better to have the following vlans and incrementing subnets in each office:

Office 1:

VLAN 20 /27

vlan 21 /24

Office 2: /27 /24


Or is there a better way to do it?

Thanks in advance


I have this problem too.
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carenas123 Thu, 05/17/2007 - 06:51

VLAN provides over a subnetted network is that devices in different physical locations, not going back to the same router, can be on the same network. The limitation of subnetting a network with a router is that all devices on that subnet must be connected to the same switch and that switch must be connected to a port on the router.

The use of Private VLAN's defers the need for subnetting of the IP address space allowing all hosts in the same Private VLAN to share the address space.

You are in right direction. Try to configure your concept. Click following URL that will help you to solve your problem.


Once the host is authenticated, it can also be assigned to a particular VLAN. Depending on how precisely the network is architected, VLANs can restrict user groups to a predefined set of resources and prevent users from accessing other areas of the network.

If you want to know more please click Below URL :


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