RE: Duplicate Ip addresses

So they have an AS and their own Address Space? Use L2TPv3 between the two,
and advertise the address space from the site with the majority of the
systems. Move the primary public facing system when you are ready to change
the advertisement to the new site. For email I would move the secondary mail
server, then flip MX records when you flip the routing. If using the same
Internet Service Provider at both sites, talk with them about advertisement
of more specifics and using no-export. Advertise the /24 from both sites,
prepended from the secondary site. Advertise more specifics, /25 /26 /27 as
servers are moved so you get direct routing on the providers network. If you
have different carriers then you are going to have to live most likely with
an aggregate if you only have a single /24, larger address space will be
helpful. If they are using 100% of their address space this will be the
biggest issue. If they could renumber as they move would be the simplest of
course.

David

--
http://dcp.dcptech.com
-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Iam
Here
Sent: Monday, September 03, 2012 3:12 PM
To: David Prall; ccielab_at_groupstudy.com
Subject: RE: Duplicate Ip addresses
Yes he is moving Servers and PCs too . and the 2 sites will be connected
through the internet (L3)
> From: dcp_at_dcptech.com
> To: go_soon2010_at_hotmail.com; ccielab_at_groupstudy.com
> Subject: RE: Duplicate Ip addresses
> Date: Mon, 3 Sep 2012 14:53:03 -0400
> 
> Is he moving actual servers? Or building new ones at the new site? If
moving
> servers, you can extend the L2 between the two. I like moving groups of
> servers, so that you can advertise both the aggregate as well as a more
> specific subnet. Such as advertising the /24 from both sites, as well as a
> specific /25 from each. Could use dark fiber, metro connection, or a
carrier
> EoMPLS or VPLS between the two sites if it is available, or L2TPv3, OTV,
> EoMPLSoGRE if it is L3 between the two sites. This is all based on it
being
> Internet connections looking to support. If it is internal, could also
look
> at LISP to support direct L3 routing to the servers.
> 
> David
> 
> --
> http://dcp.dcptech.com
> 
> 
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Iam
> Here
> Sent: Monday, September 03, 2012 2:37 PM
> To: ccielab_at_groupstudy.com
> Subject: Duplicate Ip addresses
> 
> The customer will move his big site gradually from place to another but
the
> problem is that he doesn't want to move everything at the same time
> If I moved some devices with the same IP address that will create a
problem
> in the routing process  
> Is there any suggestions regarding the duplicate IP addresses between the
2
> sites 
> 
> 
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