Error code 721 in Star Wars Battlefront 2 is a known server connectivity issue, and it typically means the game can’t connect to EA’s servers.

This issue can be caused by server-side problems, but sometimes it’s due to local network or DNS problems on your end.

Here’s a step-by-step guide to troubleshoot and potentially fix it:

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✅ 1. Check EA Server Status

Start here. Sometimes it’s EA’s servers and not you:

• Visit: https://help.ea.com/en/star-wars/star-wars-battlefront-ii/

• Or check https://downdetector.com/status/ea/

If EA’s servers are down or undergoing maintenance, you’ll have to wait.

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🔁 2. Restart Your Console/PC and Router

Power cycle both:

• Turn off your system completely (not just sleep mode).

• Restart your router or modem.

• Wait 30 seconds and turn everything back on.

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🌐 3. Change Your DNS Settings (Highly Recommended)

Many users have fixed this by switching to Google’s or Cloudflare’s DNS.

✅ For PC (Windows):

1. Go to Control Panel > Network and Internet > Network and Sharing Center.

2. Click Change adapter settings.

3. Right-click your active network > Properties.

4. Select Internet Protocol Version 4 (TCP/IPv4) > Properties.

5. Use the following DNS:

   • Preferred: 8.8.8.8

   • Alternate: 8.8.4.4 (Google)

   • Or: 1.1.1.1 and 1.0.0.1 (Cloudflare)

✅ For PS4/PS5/Xbox:

• Go to Network Settings, choose Manual Setup or Advanced.

• Input the DNS settings manually (same as above).

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🔐 4. Disable UPnP or Re-enable It in Router Settings

UPnP (Universal Plug and Play) helps with NAT but can sometimes interfere with BF2.

1. Access your router settings (usually by typing 192.168.1.1 or 192.168.0.1 in a browser).

2. Log in with your router credentials.

3. Look for UPnP settings — toggle it off, save, then test BF2.

4. If already off, try turning it on instead.

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❌ 5. Disable IPv6 (PC only)

1. Go to your Network Adapter Settings.

2. Right-click your connection > Properties.

3. Uncheck Internet Protocol Version 6 (TCP/IPv6).

4. Click OK and restart.

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📥 6. Reinstall or Repair the Game

If nothing else works, try:

• Repair Game Files (if on Origin/Steam).

• Or completely uninstall and reinstall the game.