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function 3_node_snake_topo_clean
{
echo "Clearing all VPP instances.."
pkill vpp --signal 9
rm /dev/shm/*
echo "Cleaning topology.."
ip netns exec xtr-ns12 ifconfig br12 down
ip netns exec xtr-ns23 ifconfig br23 down
ip netns exec xtr-ns12 brctl delbr br12
ip netns exec xtr-ns23 brctl delbr br23
ip link del dev veth_vpp1 &> /dev/null
ip link del dev veth_vpp2 &> /dev/null
ip link del dev veth_xtr1_xtr2 &> /dev/null
ip link del dev veth_xtr2_xtr1 &> /dev/null
ip link del dev veth_xtr2_xtr3 &> /dev/null
ip link del dev veth_xtr3_xtr2 &> /dev/null
ip netns del vppns1 &> /dev/null
ip netns del vppns2 &> /dev/null
ip netns del xtr-ns12 &> /dev/null
ip netns del xtr-ns23 &> /dev/null
}
function 3_node_snake_topo_setup
{
ip netns add vppns1
ip netns add vppns2
ip netns add xtr-ns12
ip netns add xtr-ns23
ip link add veth_xtr1_xtr2 type veth peer name xtr1_xtr2
ip link add veth_xtr2_xtr1 type veth peer name xtr2_xtr1
ip link add veth_xtr2_xtr3 type veth peer name xtr2_xtr3
ip link add veth_xtr3_xtr2 type veth peer name xtr3_xtr2
# enable peer interfaces
ip link set dev xtr1_xtr2 up
ip link set dev xtr2_xtr1 up
ip link set dev xtr2_xtr3 up
ip link set dev xtr3_xtr2 up
ip link set dev veth_xtr1_xtr2 up netns xtr-ns12
ip link set dev veth_xtr2_xtr1 up netns xtr-ns12
ip link set dev veth_xtr2_xtr3 up netns xtr-ns23
ip link set dev veth_xtr3_xtr2 up netns xtr-ns23
ip netns exec xtr-ns12 brctl addbr br12
ip netns exec xtr-ns23 brctl addbr br23
ip netns exec xtr-ns12 brctl addif br12 veth_xtr1_xtr2
ip netns exec xtr-ns12 brctl addif br12 veth_xtr2_xtr1
ip netns exec xtr-ns12 ifconfig br12 up
ip netns exec xtr-ns23 brctl addif br23 veth_xtr2_xtr3
ip netns exec xtr-ns23 brctl addif br23 veth_xtr3_xtr2
ip netns exec xtr-ns23 ifconfig br23 up
# create and configure 1st veth client to vpp pair
ip link add veth_vpp1 type veth peer name vpp1
ip link set dev vpp1 up
ip link set dev veth_vpp1 up netns vppns1
# create and configure 2nd veth client to vpp pair
ip link add veth_vpp2 type veth peer name vpp2
ip link set dev vpp2 up
ip link set dev veth_vpp2 up netns vppns2
ip netns exec vppns1 \
bash -c "
ip link set dev lo up
ip addr add 6.0.1.2/24 dev veth_vpp1
ip route add 6.0.2.0/24 via 6.0.1.1
ip addr add 6:0:1::2/64 dev veth_vpp1
ip route add 6:0:2::0/64 via 6:0:1::1
"
ip netns exec vppns2 \
bash -c "
ip link set dev lo up
ip addr add 6.0.2.2/24 dev veth_vpp2
ip route add 6.0.1.0/24 via 6.0.2.1
ip addr add 6:0:2::2/64 dev veth_vpp2
ip route add 6:0:1::0/64 via 6:0:2::1
"
# generate config files
./scripts/generate_config.py ${VPP_LITE_CONF} ${CFG_METHOD}
start_vpp 5002 vpp1
start_vpp 5003 vpp2
start_vpp 5004 vpp3
sleep 2
echo "* Selected configuration method: $CFG_METHOD"
if [ "$CFG_METHOD" == "cli" ] ; then
echo "exec ${VPP_LITE_CONF}/vpp1.cli" | nc 0 5002
echo "exec ${VPP_LITE_CONF}/vpp2.cli" | nc 0 5003
echo "exec ${VPP_LITE_CONF}/vpp3.cli" | nc 0 5004
elif [ "$CFG_METHOD" == "vat" ] ; then
${VPP_API_TEST} chroot prefix vpp1 script in ${VPP_LITE_CONF}/vpp1.vat
${VPP_API_TEST} chroot prefix vpp2 script in ${VPP_LITE_CONF}/vpp2.vat
${VPP_API_TEST} chroot prefix vpp3 script in ${VPP_LITE_CONF}/vpp3.vat
else
echo "=== WARNING:"
echo "=== Invalid configuration method selected!"
echo "=== To resolve this set env variable CFG_METHOD to vat or cli."
echo "==="
fi
}
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