diff --git a/packer/cpu/buildkite-cpu-ami.pkr.hcl b/packer/cpu/buildkite-cpu-ami.pkr.hcl
index 4b95e11e..f75842f3 100644
--- a/packer/cpu/buildkite-cpu-ami.pkr.hcl
+++ b/packer/cpu/buildkite-cpu-ami.pkr.hcl
@@ -124,6 +124,11 @@ build {
     source      = "vllm-cache-source"
   }
 
+  # Configure network settings for high-throughput operations
+  provisioner "shell" {
+    script = "scripts/configure-network.sh"
+  }
+
   # Install BuildKit as standalone systemd service (runs as ec2-user with sudo)
   provisioner "shell" {
     script = "scripts/install-build-tools.sh"
diff --git a/packer/cpu/scripts/configure-network.sh b/packer/cpu/scripts/configure-network.sh
new file mode 100755
index 00000000..a8660aa8
--- /dev/null
+++ b/packer/cpu/scripts/configure-network.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+set -eu -o pipefail
+
+# Network tuning for high-throughput container image operations
+# Optimized for r6in instances with 100Gbps networking
+
+echo "=== Configuring network sysctl settings ==="
+
+cat <<'EOF' | sudo tee /etc/sysctl.d/99-vllm-network.conf
+# Network tuning for high-throughput Docker builds
+# Reference: https://docs.aws.amazon.com/datatransferterminal/latest/userguide/tech-requirements.html
+
+# BBR congestion control - helps sustained ECR transfers
+net.core.default_qdisc = fq
+net.ipv4.tcp_congestion_control = bbr
+
+# Avoid slow start after idle - helps frequent connections
+net.ipv4.tcp_slow_start_after_idle = 0
+
+# Reasonable buffers (enough for ECR rate)
+net.core.rmem_max = 16777216
+net.core.wmem_max = 16777216
+net.ipv4.tcp_rmem = 4096 1048576 16777216
+net.ipv4.tcp_wmem = 4096 1048576 16777216
+EOF
+
+# Apply sysctl settings
+sudo sysctl -p /etc/sysctl.d/99-vllm-network.conf
+
+# -----------------------------------------------------------------------------
+# Docker daemon configuration for high-throughput registry operations
+# -----------------------------------------------------------------------------
+echo "=== Configuring Docker daemon ==="
+
+# Update Docker daemon config to increase concurrent downloads/uploads
+# Use jq to merge with existing config, or create new if doesn't exist
+if [[ -f /etc/docker/daemon.json ]]; then
+    # Merge with existing config
+    sudo jq '. + {"max-concurrent-downloads": 16, "max-concurrent-uploads": 16}' /etc/docker/daemon.json | sudo tee /etc/docker/daemon.json.tmp
+    sudo mv /etc/docker/daemon.json.tmp /etc/docker/daemon.json
+else
+    # Create new config
+    echo '{"max-concurrent-downloads": 16, "max-concurrent-uploads": 16}' | sudo tee /etc/docker/daemon.json
+fi
+
+# Restart Docker to apply new config
+sudo systemctl restart docker
+echo "Docker daemon configured and restarted"
+
+echo "=== Network configuration complete ==="