If you use a Point-to-Point Protocol connection over Ethernet (PPPoE), you may
notice a delay in using the PPPoE connection after startup. By default, there is a 120 second delay but you can stop this behavior by manually configuring an IP address for the network adapter card. If you do not use a PPPoE connection, you can skip this section.
1. Select Start/Connect to/Show All Connections.
2. Open the TCP/IP properties for your LAN network interface card.
3. Manually set the IP address on the TCP/IP properties to an appropriate IP address and subnet mask for your network.
" Windows XP Tips: Speeding Up Your PPPoE Connection"
Reference : techpraveen.com