# ============================================================
# RRPP 节点系统级网络优化（KVM / 完整虚拟机版）
# 部署位置：/etc/sysctl.d/99-zz-rrpp-network.conf
# 配套：systemd/rrpp-qdisc.service + scripts/rrpp-qdisc.sh（fq 队列 + UDP GRO）
# 文件名 99-zz- 前缀保证最后生效；注意 /etc/sysctl.conf 会更晚加载（见 README §2.6）
# ============================================================

# --- 拥塞控制与队列 ---
net.ipv4.tcp_congestion_control = bbr
net.core.default_qdisc = fq

# --- PMTUD 黑洞缓解 ---
net.ipv4.tcp_mtu_probing = 1

# --- 握手 / 时延 ---
net.ipv4.tcp_fastopen = 3
net.ipv4.tcp_slow_start_after_idle = 0

# --- 连接生命周期 ---
net.ipv4.tcp_tw_reuse = 2
net.ipv4.tcp_fin_timeout = 15
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.ip_local_port_range = 10240 65000

# --- 队列深度与缓冲（TCP）---
net.core.somaxconn = 32768
net.ipv4.tcp_max_syn_backlog = 32768
net.core.netdev_max_backlog = 32768
net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
net.ipv4.tcp_rmem = 4096 131072 33554432
net.ipv4.tcp_wmem = 4096 16384 33554432

# --- UDP（Hysteria2 / TUIC / UoT 的 socket 缓冲下限）---
net.ipv4.udp_rmem_min = 8192
net.ipv4.udp_wmem_min = 8192