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Can 2 Vlans have the same subnet?
If the addresses are all different it is possible to route traffic using a very large number of rules which don’t correspond to the actual subnet configuration and will confuse anyone who inherits this from you. However, it is completely permissible to use the same RFC1918 subnets on different physical networks.
No, VLANs don’t require different subnets. Different subnets require different subnet addresses if they ever need to be able to route and/or talk to each other) and by extension if one VLAN wants to talk to a different VLAN it must use different addresses so we can make a routing decision to the right place.
Can a router have access to both subnets?
You should now have internet access on both subnets, be able to ping across subnets and also be able to access services across subnets (local webservers, SSH, telnet, mail, etc). You will not be able to see network file shares across subnets in Windows, however, as this requires a WINS server (which is well outside the scope of this post).
Which is the default gateway for two subnets?
Thank you for your help so far! The default gateway must be on the same network as the devices that use it. The router you setup to route between the subnets should be setup as the default gateway, then you will route all traffic not going to 172.25 or 172.26 to the Internet gateway.
Can a subnet reach a system on subnet 1?
Systems on both subnets should be able to reach the internet. Also, Subnet 2 should be able to ping and reach systems on Subnet 1; however, systems on Subnet 1 should not be able to ping or reach systems on Subnet 2. For this, we need to create a static route so Subnet 1 can reach Subnet 2.
Is there a subnet for each VLAN?
Each VLAN will have a separate subnet back on our router. Each subnet would terminate on its own “sub interface”, a logical partitioning of the physical connection to the access switches.