===== Set up an IPv6 vRouter on a Service VM in OpenStack + ML2 OVS Environment ===== Here you will find the steps involved in creating a ServiceVM that acts as an IPv6 vRouter.\\ In this example, we will be using a CentOS7 image as vRouter (we should be able to use other OS as well) and devstack for OpenStack installation. Enable port_security extension as the extension_drivers in ml2 configuration file.\\ Following is a sample configuration of devstack local.conf file. [[local|localrc]] DATA_DIR=$DEST/data SCREEN_LOGDIR=$DATA_DIR/logs LOGFILE=$SCREEN_LOGDIR/stack.sh.log ADMIN_PASSWORD=password MYSQL_PASSWORD=password RABBIT_PASSWORD=password SERVICE_PASSWORD=password SERVICE_TOKEN=token disable_service n-net tempest h-eng h-api h-api-cfn h-api-cw enable_service q-svc q-dhcp q-meta q-agt q-l3 n-novnc [[post-config|/$Q_PLUGIN_CONF_FILE]] [ml2] extension_drivers=port_security After successful installation of OpenStack with the above configuration, we shall create the necessary neutron networks/subnets/ports etc.\\ cd devstack ./stack.sh Source the tenant credentials. source openrc admin demo # Create a Neutron router which provides external connectivity. neutron router-create router1 # Create an external network using the appropriate values based on the data-center physical network setup. neutron net-create --provider:network_type --provider:physical_network --provider:segmentation_id --router:external ext-net # Configure ipv6_gateway= in the Neutron L3 agent configuration file. # Associate the ext-net to the neutron router. neutron router-gateway-set router1 ext-net # Create an IPv6 internal network. neutron net-create ipv6-internal-network # Create an IPv6 subnet in the internal network. neutron subnet-create --name ipv6-int-subnet --ip-version 6 --ipv6-ra-mode slaac --ipv6-address-mode slaac ipv6-internal-network 2001:db8:0:1::/64 # Associate the internal subnet to a neutron router. neutron router-interface-add router1 ipv6-int-subnet Now we shall create an isolated network which is the internal network of vRouter.\\ # Create an isolated router for the tenant internal network. neutron router-create router2 # Create a Neutron Internal Network. neutron net-create tenant-internal-network # Create an IPv4 subnet in the internal network. neutron subnet-create --name ipv4-int-subnet tenant-internal-network 10.0.0.1/24 # Associate the router2 to IPv4 subnet created above. neutron router-interface-add Mapping this configuration to [[ipv6_opnfv_project:poc_design|POC-1]]. ipv6-internal-network and ext-net is the Red colored network. tenant-internal-network is the Green colored network. Lets create two neutron ports one from ext-net and the other from tenant-internal-network for the vRouter VM neutron port-create ipv6-internal-network --port-security-enabled=False --name enp0s3-port neutron port-create tenant-internal-network --port-security-enabled=False --name enp0s8-port Download the Centos7 image which is used as vRouter. glance image-create --name 'Centos7' --disk-format qcow2 --container-format bare --is-public true --copy-from http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2 Create a keypair. nova keypair-add vRouterKey > ~/vRouterKey Spawn the Centos7 image with two nics (i.e., enp0s3-port and enp0s8-port) nova boot --image –flavor m1.small --nic port-id=$(neutron port-show -f value -F id enp0s3-port) –nic --nic port-id=$(neutron port-show -f value -F id enp0s8-port) --key-name vRouterKey CentOSvRouter Verify that CentOSvRouter boots up successfully and keypair is injected. nova list nova console-log CentOSvRouter After the image boots up successfully, from the router1 namespace, ssh to vRouter using the keypair. sudo ip netns sudo ip netns exec bash ssh -i ~/vRouterKey centos@ As a one time job, before we can create the snapshot, execute the steps (i.e., SLAAC setup) mentioned at the following link. https://wiki.opnfv.org/ipv6_opnfv_project/vm_as_router In order to verify that the setup is working, lets create some cirros VMs on the "tenant-internal-network" (i.e., vRouter internal network). nova boot --image --flavor m1.tiny --nic net-id= VM1 nova boot --image --flavor m1.tiny --nic net-id= VM2 Confirm that both the VMs have successfully booted up. nova list nova console-log VM1 nova console-log VM2 Add the necessary security group ingress rules. source openrc demo demo # SSH access to the VMs neutron security-group-rule-create --direction ingress --protocol tcp --port-range-min 22 --port-range-max 22 --remote-ip-prefix 10.0.0.0/24 default # Permit IPv6 Router Advts from the vRouter internal interface to the VMs. neutron security-group-rule-create --direction ingress --ethertype IPv6 --protocol icmpv6 --port-range-min 134 --remote-ip-prefix fe80::/64 default SSH to the cirros VMs to check the IPv6 forwarding use-case. sudo ip netns sudo ip netns exec bash ssh cirros@ Note: default password of cirros image would be "cubswin:)" Verify that Cirros image has an IPv6 address assigned via SLAAC with a prefix of "2001:db8:0:2::/64" ip address # verify that default route points to the LLA of enp0s8 interface of vRouter. ip -6 route Try pinging to the internal router interface of router1 (i.e., 2001:db8:0:1::1/64) ping6 2001:db8:0:1::1/64 If all goes well, ping6 should succeed which shows that vRouter is forwarding the IPv6 traffic of instances on the tenant-internal-network. At this state, we can create a snapshot of the CentOSvRouter and use it in any other similar OpenStack setup. nova image-create nova image-list #You will find the snapshot you just created above.