WAN Network Addresses and Long Reach Ethernet Questions

Hi there,

Just a bit stuck on this and wondering if anyone can help me out. We
are in the process of setting up another server solution in a second
data centre. We are trying to joing to networks running on different
IP addresses using a long reach ethernet connection between the two
sites. We are in the process of getting the cabling put in but i am
not sure on the network addresses to use to connection the two.

We could take an address from our first solution and and put it on the
end of the LRE conenction in the data centre but that would mean
everything would be broadcast out over the lRE connection. The
company i am working with suggested setting up a private network
address range at either end of the connection.

I am not sure exactly how this would work. Could anyone help clarify
this. If i put 192.168.0.1 and 192.168.0.2 at either end the two
machines that are connected would be able to talk but how would the
other machines on the different addresses at either end talk? Would i
need to allocate private IPs for all of the machines on the network to
get them all to talk?

Should the LRE connection at our existing solution go into the 2nd
network card of one of the servers or into a switch? Bit stuck on
this as things are complicated as i think the switch has got several
different VLANs on it. If i put it into the machine directly i'm
thinking we are going to struggle to talk to anything apart from that
one.

Sorry for all the questions but i'm a bit stumped!

NewellWhite
Fri Mar 28 07:50:00 PDT 2008


"Fox1977" wrote:

> Hi there,
>
> Just a bit stuck on this and wondering if anyone can help me out. We
> are in the process of setting up another server solution in a second
> data centre. We are trying to joing to networks running on different
> IP addresses using a long reach ethernet connection between the two
> sites. We are in the process of getting the cabling put in but i am
> not sure on the network addresses to use to connection the two.
>
> We could take an address from our first solution and and put it on the
> end of the LRE conenction in the data centre but that would mean
> everything would be broadcast out over the lRE connection. The
> company i am working with suggested setting up a private network
> address range at either end of the connection.
>
> I am not sure exactly how this would work. Could anyone help clarify
> this. If i put 192.168.0.1 and 192.168.0.2 at either end the two
> machines that are connected would be able to talk but how would the
> other machines on the different addresses at either end talk? Would i
> need to allocate private IPs for all of the machines on the network to
> get them all to talk?
>
> Should the LRE connection at our existing solution go into the 2nd
> network card of one of the servers or into a switch? Bit stuck on
> this as things are complicated as i think the switch has got several
> different VLANs on it. If i put it into the machine directly i'm
> thinking we are going to struggle to talk to anything apart from that
> one.
>
> Sorry for all the questions but i'm a bit stumped!
>

You need a router at one end of the cable - device with two NICs one on each
network.

I imagine that configuring RRAS on a server on each network will then set
you up.
Otherwise all computers that need to communicate with the other network
could have their routing tables configured by a logon script.
--
Regards,
Newell White

Bill
Fri Mar 28 16:58:53 PDT 2008


"Newell White" <NewellWhite@discussions.microsoft.com> wrote in message
news:E4ED6543-7BCE-4F02-A01C-495233C3EDB3@microsoft.com...
>
> "Fox1977" wrote:
>
>> Hi there,
>>
>> Just a bit stuck on this and wondering if anyone can help me out. We
>> are in the process of setting up another server solution in a second
>> data centre. We are trying to joing to networks running on different
>> IP addresses using a long reach ethernet connection between the two
>> sites. We are in the process of getting the cabling put in but i am
>> not sure on the network addresses to use to connection the two.
>>
>> We could take an address from our first solution and and put it on the
>> end of the LRE conenction in the data centre but that would mean
>> everything would be broadcast out over the lRE connection. The
>> company i am working with suggested setting up a private network
>> address range at either end of the connection.
>>
>> I am not sure exactly how this would work. Could anyone help clarify
>> this. If i put 192.168.0.1 and 192.168.0.2 at either end the two
>> machines that are connected would be able to talk but how would the
>> other machines on the different addresses at either end talk? Would i
>> need to allocate private IPs for all of the machines on the network to
>> get them all to talk?
>>
>> Should the LRE connection at our existing solution go into the 2nd
>> network card of one of the servers or into a switch? Bit stuck on
>> this as things are complicated as i think the switch has got several
>> different VLANs on it. If i put it into the machine directly i'm
>> thinking we are going to struggle to talk to anything apart from that
>> one.
>>
>> Sorry for all the questions but i'm a bit stumped!
>>
>
> You need a router at one end of the cable - device with two NICs one on
> each
> network.
>
> I imagine that configuring RRAS on a server on each network will then set
> you up.
> Otherwise all computers that need to communicate with the other network
> could have their routing tables configured by a logon script.
> --
> Regards,
> Newell White
>
>

As Newell said, you do not need to change any addresses in the existing
networks. The point-to-point simply acts as a link between the sites, and
you configure the sites to route trhough the link. What devices you use to
handle the routing is up to you. You could use hardware devices, or a
machine running Windows Server with RRAS or a Linux router if you are
familiar with that. It is a pretty basic routing setup to send traffic for
the "other" site through the link.