Ref: https://learn.cantrill.io/courses/2022818/lectures/45660746

YouTube: https://www.youtube.com/watch?v=B6uEtlZJqso

• Summary:
• Contents:

Standard Ethernet Frames vs Jumbo Frames

• 🔧 Maximum Transmission Unit (MTU) in Ethernet v2 = 1500 bytes
  • Anything bigger → Jumbo Frame (but generally, MTU for Jumbo Frame = 9000 bytes)
• Jumbo frames have lower frame overhead to payload (data) ratio:
  • 👍 More efficient throughput
  • 👍 Less frames → less wasted time on medium between frames
• Considerations
  • 👎 Every L2 step in L3 NWs must support Jumbo frames, otherwise fragmentation (bad)
  • 👎 Not everything in AWS supports Jumbo frames

Jumbo Frames in AWS

• AWS products that support Jumbo Frames:
  • ✅ Same-region VPC peering connection
  • ✅ Direct Connect (DX)
  • ✅ Transit Gateway (TGW)
    • ‼️ But MTU only up to 8.5kB!
• Following AWS products do NOT support Jumbo Frames:
  • ❌ Cross-region VPC peering connection
  • ❌ VPN connection
  • ❌ Internet Gateway (IGW)