The domain member will simply choose the smallest/most specific subnet to which it belongs. This improves the overall scalability of deploying split tunneling and multiple routed subnet features under Cisco Easy VPN. You could write a script that's a little snazzier than that, but I'm too lazy to write the whole thing for you right now.īy the way, it's OK to have overlapping subnets defined in Active Directory. If you wanted to check a whole bunch of IPs at once, nltest /DSADDRESSTOSITE: /ADDRESSES:$( (Get-Content C:\Temp\IPs.txt ) -join ",") So in your script, you'd probably be looking for (null) to verify that the given IP address was not part of an AD site. This is not a smooth, scalable, practical solution. The goal is that devices on Site1 can communicate with devices on Site2, although their ip subnets overlap. If the IP address was not part of a site-subnet mapping in Active Directory, the output will resemble: Get the site-subnet mapping from '\\'.ġ92.168.1.64 Default-First-Site-Name (null) As it stands now, if we get a new client with an overlapping subnet (ie, 192.168.1.x), we'll have to add a new VPN box. Hi all, I'm trying to connect two sites through IPSec VPN, that are using the same ip subnet (let's say 192.168.100.0/24) for their local LAN. If the given IP address is part of a site and subnet pair that is defined in Active Directory, the output will resemble: Get the site-subnet mapping from '\\'. Make sure your VNet address space (CIDR block) does not overlap with your organization's other network ranges. nltest /DSADDRESSTOSITE: /ADDRESSES:192.168.1.64 It starts giving the warning for overlap To detect if the subnet is overlapping and overlapping subnet can't be peered as per attached screenshot. ![]() This is close, as it will take IP addresses, but it won't take subnets.
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