Chapter 7 - DNS Configuration

Section 2: How it Works

Function of the XC-DPG602/603 Step 1: A domain name request enters the Gateway. The request is checked by the Load Balancing algorithm that determines which WAN port to use based on the Gateway’s current load statistics. Setup 2: A reply is sent to the web browser. The Gateway directs the browser session to the WAN port with the least traffic. Step 3: The web browser is then connected to the appointed IP address through that available WAN port.

When inbound requests to the XC-DPG602/603 increases, traffic is load balanced between WAN 1 and WAN 2 to maintain optimum bandwidth for your network.

---

Inbound Load Balancing Function for XC-DPG602 & 603 Gateways

Note: This example uses WAN 1 as the initial recipient for the request of a domain name.

1. A web browser makes a request for a domain name. This request is received by WAN 1.
2. The domain name request is transferred and processed through the Authoritative DNS Module.
3. The DNS Module then asks the WAN Port Monitoring Module to provide the IP address of the requested web server.
4. The WAN Port Monitoring Module service checks the current load on WAN 1 and WAN 2.
5. The Load Balance Algorithm is applied to the request. This holds the Gateway’s user preferences and setting values including load-share and load balance type.
6. The Load Balancing Algorithm determines that WAN 2 has the least amount of traffic sessions and therefore instructs the DNS Module to use WAN 2.
7. A reply from the Gateway is then sent back through WAN 1 to the source of the DNS request.
8. The web browser receives the Gateway’s reply and is forwarded to the domain name’s respective IP address. The web browser will now retrieve the information that was requested.
9. The information request is then directed through WAN 2.
10. The information requested from the web browser is now accessed on the web or FTP server located behind the Gateway.

PREV: Overview	NEXT: DNS Configuration
1 | 2 | 3 | 4