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Setup VPP and host to enable internet access for a host
#!/bin/bash
PATH=$PATH:./build-root/build-vpp-native/vpp/bin/
if [ $USER != "root" ] ; then
echo "Restarting script with sudo..."
sudo $0 ${*}
exit
fi
# delete previous incarnations if they exist
ip link del dev vpp1
ip link del dev vpp2
ip netns del vpp1
#create namespaces
ip netns add vpp1
# create and configure 1st veth pair
ip link add name veth_vpp1 type veth peer name vpp1
ip link set dev vpp1 up
ip link set dev veth_vpp1 up netns vpp1
ip netns exec vpp1 \
bash -c "
ip link set dev lo up
ip addr add 172.16.1.2/24 dev veth_vpp1
ip route add 172.16.2.0/24 via 172.16.1.1
ip route add default via 172.16.1.1
"
# create and configure 2nd veth pair
ip link add name veth_vpp2 type veth peer name vpp2
ip link set dev vpp2 up
ip addr add 172.16.2.2/24 dev veth_vpp2
ip link set dev veth_vpp2 up
ip route add 172.16.1.0/24 via 172.16.2.2
# configure VPP
vppctl create host-interface name vpp1
vppctl create host-interface name vpp2
vppctl set int state host-vpp1 up
vppctl set int state host-vpp2 up
vppctl set int ip address host-vpp1 172.16.1.1/24
vppctl set int ip address host-vpp2 172.16.2.1/24
vppctl ip route add 172.16.1.0/24 via 172.16.1.1 host-vpp1
vppctl ip route add 172.16.2.0/24 via 172.16.2.1 host-vpp2
vppctl ip route add 0.0.0.0/0 via 172.16.2.2 host-vpp2
vppctl set interface proxy-arp host-vpp2 enable
vppctl set ip arp proxy 172.16.1.1 - 172.16.1.2
# Enable IP-forwarding.
echo 1 > /proc/sys/net/ipv4/ip_forward
# Flush forward rules.
iptables -P FORWARD DROP
iptables -F FORWARD
# Flush nat rules.
iptables -t nat -F
# Enable NAT masquerading
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
iptables -A FORWARD -i wlan0 -o veth_vpp2 -j ACCEPT
iptables -A FORWARD -o wlan0 -i veth_vpp2 -j ACCEPT
@Infixz
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Infixz commented Feb 8, 2021

50 vppctl set ip arp proxy 172.16.1.1 - 172.16.1.2
This line won't work on vpp 20.01. I know it's setting from 2017 but as amateur devops it's hard to find any mature setting enable my little home server working as a router using vpp&dpdk. Can you give me some guide ?

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