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#!/bin/sh
set -eu
prefix="10.1"
count="${1:-8}"
for net in $(seq 1 $count); do
ns="newpid$net"
veth="veth$net"
ceth="ceth$net"
ip netns add $ns 2> /dev/null || :
ip link del $veth 2> /dev/null || :
ip link add $veth type veth peer name $ceth
ip link set $ceth netns $ns
ip a add $prefix.$net.1/24 dev $veth
ip link set $veth up
ip netns exec $ns ip link set lo up
ip netns exec $ns ip a add $prefix.$net.2/24 dev $ceth
ip netns exec $ns ip link set $ceth up
ip netns exec $ns ip r add default via $prefix.$net.1
done
# see also forwarding/masquerading rules in ansible/nftables.conf
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