#!/bin/bash -xe

# Interface towards UPF:
IFACE_UPF="enp2s0f0np0"
IPADR_UPF="172.16.32.1"
NUM_CN=50

# Disable ethernet flow control:
sudo ethtool -A $IFACE_UPF autoneg off rx off tx off
# Increase NIC buffers:
sudo ethtool -G $IFACE_UPF rx 8192 tx 8192
# Increase Adapter Transmit Queue:
sudo ip link set dev $IFACE_UPF txqueuelen 2000

# Increase UDP buffer memory:
sudo sysctl -w net.ipv4.udp_mem="763563 900000000 1000000000"
sudo sysctl -w net.core.optmem_max=16000000
sudo sysctl -w net.core.rmem_max=2000000000
sudo sysctl -w net.core.rmem_default=2000000000
sudo sysctl -w net.core.wmem_max=2000000000
sudo sysctl -w net.core.wmem_default=2000000000
sudo sysctl -w net.core.netdev_max_backlog=2000
sudo sysctl -w net.core.netdev_budget=600

# Set up CN IP addresses:
for i in $(seq "0" "$((NUM_CN - 1))"); do
	sudo ip addr add "$(printf "172.16.32.2%02u/24" $i)" brd 172.16.32.255 dev $IFACE_UPF || true;
done
sudo ip route add 192.168.0.0/16 via $IPADR_UPF dev $IFACE_UPF