This is my first blog on the Cisco portal and my not a native English speaker. So there is a chance to make some grammatical mistakes. Please ignore it or make me correct.
Few days before we were working at a client site and we found some limitations on NGFW (another vendor) as that device will not work in bridge mode with PPOE connection. My friend has come with an RFC 1027.
I knew the Proxy-ARP but never seen this type of example. This is called "transparent Subnet Gateways Using Proxy ARP". Proxy ARP is the technique of using a router to answer ARP requests. Proxy ARP can help hosts on a subnet reach remote subnets without the need for additional configuration. An administrator can set up a Transparent Subnet Gateway so that two physical segments with the same IP address range, connected to the same router can communicate via ARP with each other.
Here is the Network diagram for the same:
And here is the configuration for the same:
R1: Inside Web Server (Maybe another server)
R2: Internet Gateway for my Office/Edge router
R3: ISP Router and this router is not in your under control.
This is my LAB and I don't have any server added to my GNS3 so I added a router and configured:
IP 188.8.131.52/24 added under the interface FastEthernet 0/0
Default Gateway added to 184.108.40.206 (My Internet/WAN Default Gateway), which is configured on ISP router.
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