name : test_vxlan_under_vrf.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # This test is for checking VXLAN underlay in a non-default VRF. # # It simulates two hypervisors running a VM each using four network namespaces: # two for the HVs, two for the VMs. # A small VXLAN tunnel is made between the two hypervisors to have the two vms # in the same virtual L2: # # +-------------------+ +-------------------+ # | | | | # | vm-1 netns | | vm-2 netns | # | | | | # | +-------------+ | | +-------------+ | # | | veth-hv | | | | veth-hv | | # | | 10.0.0.1/24 | | | | 10.0.0.2/24 | | # | +-------------+ | | +-------------+ | # | . | | . | # +-------------------+ +-------------------+ # . . # . . # . . # +-----------------------------------+ +------------------------------------+ # | . | | . | # | +----------+ | | +----------+ | # | | veth-tap | | | | veth-tap | | # | +----+-----+ | | +----+-----+ | # | | | | | | # | +--+--+ +--------------+ | | +--------------+ +--+--+ | # | | br0 | | vrf-underlay | | | | vrf-underlay | | br0 | | # | +--+--+ +-------+------+ | | +------+-------+ +--+--+ | # | | | | | | | | # | +---+----+ +-------+-------+ | | +-------+-------+ +---+----+ | # | | vxlan0 |....| veth0 |.|...|.| veth0 |....| vxlan0 | | # | +--------+ | 172.16.0.1/24 | | | | 172.16.0.2/24 | +--------+ | # | +---------------+ | | +---------------+ | # | | | | # | hv-1 netns | | hv-2 netns | # | | | | # +-----------------------------------+ +------------------------------------+ # # This tests both the connectivity between vm-1 and vm-2, and that the underlay # can be moved in and out of the vrf by unsetting and setting veth0's master. source lib.sh set -e cleanup() { ip link del veth-hv-1 2>/dev/null || true ip link del veth-tap 2>/dev/null || true cleanup_ns $hv_1 $hv_2 $vm_1 $vm_2 } # Clean start cleanup &> /dev/null [[ $1 == "clean" ]] && exit 0 trap cleanup EXIT setup_ns hv_1 hv_2 vm_1 vm_2 hv[1]=$hv_1 hv[2]=$hv_2 vm[1]=$vm_1 vm[2]=$vm_2 # Setup "Hypervisors" simulated with netns ip link add veth-hv-1 type veth peer name veth-hv-2 setup-hv-networking() { id=$1 ip link set veth-hv-$id netns ${hv[$id]} ip -netns ${hv[$id]} link set veth-hv-$id name veth0 ip -netns ${hv[$id]} link add vrf-underlay type vrf table 1 ip -netns ${hv[$id]} link set vrf-underlay up ip -netns ${hv[$id]} addr add 172.16.0.$id/24 dev veth0 ip -netns ${hv[$id]} link set veth0 up ip -netns ${hv[$id]} link add br0 type bridge ip -netns ${hv[$id]} link set br0 up ip -netns ${hv[$id]} link add vxlan0 type vxlan id 10 local 172.16.0.$id dev veth0 dstport 4789 ip -netns ${hv[$id]} link set vxlan0 master br0 ip -netns ${hv[$id]} link set vxlan0 up } setup-hv-networking 1 setup-hv-networking 2 # Check connectivity between HVs by pinging hv-2 from hv-1 echo -n "Checking HV connectivity " ip netns exec $hv_1 ping -c 1 -W 1 172.16.0.2 &> /dev/null || (echo "[FAIL]"; false) echo "[ OK ]" # Setups a "VM" simulated by a netns an a veth pair setup-vm() { id=$1 ip link add veth-tap type veth peer name veth-hv ip link set veth-tap netns ${hv[$id]} ip -netns ${hv[$id]} link set veth-tap master br0 ip -netns ${hv[$id]} link set veth-tap up ip link set veth-hv address 02:1d:8d:dd:0c:6$id ip link set veth-hv netns ${vm[$id]} ip -netns ${vm[$id]} addr add 10.0.0.$id/24 dev veth-hv ip -netns ${vm[$id]} link set veth-hv up } setup-vm 1 setup-vm 2 # Setup VTEP routes to make ARP work bridge -netns $hv_1 fdb add 00:00:00:00:00:00 dev vxlan0 dst 172.16.0.2 self permanent bridge -netns $hv_2 fdb add 00:00:00:00:00:00 dev vxlan0 dst 172.16.0.1 self permanent echo -n "Check VM connectivity through VXLAN (underlay in the default VRF) " ip netns exec $vm_1 ping -c 1 -W 1 10.0.0.2 &> /dev/null || (echo "[FAIL]"; false) echo "[ OK ]" # Move the underlay to a non-default VRF ip -netns $hv_1 link set veth0 vrf vrf-underlay ip -netns $hv_1 link set vxlan0 down ip -netns $hv_1 link set vxlan0 up ip -netns $hv_2 link set veth0 vrf vrf-underlay ip -netns $hv_2 link set vxlan0 down ip -netns $hv_2 link set vxlan0 up echo -n "Check VM connectivity through VXLAN (underlay in a VRF) " ip netns exec $vm_1 ping -c 1 -W 1 10.0.0.2 &> /dev/null || (echo "[FAIL]"; false) echo "[ OK ]"