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Supernetting and VPN

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3 replies

by gordinho

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Hi,

A company has a head office and 7 remote offices. Each office uses a non routable/natted class C at each location, each remote office is connected to the head ofice by static VPN tunnels. The head office is within 10 addresses of being "full house". They use the addressing scheme 192.168.42.0 /24 with the remote offices starting 192.168.43.0/24 and so on. My idea is to supernet the head office being that 192.168.41.0/24 is available. Now, I understand the theory of supernetting but am not sure about the implication to the remote offices who need to access server hosts on the head office lan. If I change all the hosts on the head office lan to mask 255.255.254.0 then I am assuming that the remote networks will not be able to route to the head office servers if their subnets remain /24? The remote offices use Soho Watchguard 6 as their gateways and connect to an Intel 3110 VPN gateway at the head office (if that makes a difference)

Any pointers/guidance from network gurus is much appreciated

cheers in advance

Gordy

3 replies

by cg it

with 8 bits to play with for host addressing on Class C and your running out of addresses, you might consider going to a Private Class B which has 16 bits for host addressing.

Remote Offices can be on their own subnet. At the head office just create a pool of static addresses remote connections use so they can access local LAN resources.

I'd go the route of Class B addressing. Solves a lot of headaches.

by gordinho

interesting, I hadn't though about going upto a class B...thanks for the suggestion.

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