How do i increase my Aggregated link speed

A 100 Mbps aggregated or Ethernet link usually points to link negotiation falling back because of the physical connection, not a Windows Speed & Duplex setting.

Try this in order:

1. Check the cable first.
   • Unplug and replug the network cable at both ends.
   • Replace it with a different, known-good cable.
   • If possible, use a higher quality cable.
2. Check the port path.
   • If the PC is connected through a wall socket, switch, or other intermediate device, test with a direct connection to the router or switch.
   • A faulty wall jack, switch port, router port, or NIC port can cause the link to stay at 100 Mbps.
3. Test with another device.
   • Connect the same cable to another computer that supports Gigabit Ethernet.
   • If the second device also links at 100 Mbps, the issue is likely the cable, wall socket, or network equipment.
   • If the second device links at 1 Gbps, the issue is likely the original PC or its adapter.
4. Set the adapter back to Auto-Negotiation.
   • In the network adapter advanced properties, set Duplex Speed or Speed & Duplex to Auto-Negotiation.
   • A fixed manual setting can mismatch the switch and prevent proper negotiation.
5. Disable adapter power-saving features.
   • In the adapter advanced settings, disable options such as Green Ethernet if present.
   • In environments where performance matters, power management that turns off or throttles the adapter should be avoided.
6. Verify switch and adapter settings match.
   • Fixed speed, duplex, and flow control settings should correspond to the switch settings.
   • Mismatched settings can cause periodic auto-synchronization issues or reduced link speed.

If the link still stays at 100 Mbps after those checks, the most likely causes are:

• faulty or low-quality cable
• bad connector or wall socket
• bad router/switch port
• bad Ethernet port on the PC

• Network Optimizations
• Link speed [Removed PII] - Microsoft Q&A
• Ethernet Drops from 1 Gbps to 100 Mbps - Microsoft Q&A