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Introduction

The Swisscom virtual BNG and Edge SDN M&C for the ONAP BBS use-case is a demo system. It is a functional prototype and it is not meant for production use. The whole system is running in a single OpenStack VM and therefore only able to support a small number of subscribers. The forwarding dataplane is implemented fully inside the VMs Linux networking stack and therefore not designed to support high data rates. The system is able to interact with ONAP according to the BBS use-case definition.

Below a diagram of the whole end-to-end architecture, the Edge SDN M&C + vBNG VM is highlighted:

As shown above in the diagram the DHCP and Dataplane traffic are brought to the VM by VxLAN tunneling.  Since it is just routed L3 traffic,  DHCP traffic does not really require VxLAN. For sake of not having two different tunnel technologies we use VxLAN tunneling for both DHCP and Dataplane traffic. Now the question is if the OLT supports native VxLAN tunneling. In our case the OLT does not. Therefore some VxLAN tunnel encapsulation device is required (see transport middle boxes above). Those boxes are very simple to set up. See at the very end of this document how to build such a middle box.

Installation by Heat Template

The Swisscom virtual BNG and Edge SDN M&C is installed and initially set up by a single Heat Orchestration Template. Therefore the OpenStack cloud you would like to use for testing should support Orchestration with Heat. The complete initial BNG and vBNG + Edge SDN M&C configuration is provided as Heat stack parameters. The Heat stack creates all the required OpenStack infrastructure, e.g. router, network, security group, port and vbng instance.

Once the stack is created, the vBNG configuration file is deployed to the instance to '$HOME/vbng.conf' and latest vBNG code is directly pulled from specified upstream git repository (default is the Swisscom repository) by cloud-init user-data script. The stack output shows initial vBNG configuration, the floating IP and how to connect to the instance by SSH. To create a stack in OpenStack heat you first require the Heat template from here: https://git.swisscom.com/projects/ZTXGSPON/repos/opnfv/browse/heat/vbng.yaml (Drop a note to michail salichos, David Perez Caparros  or dbalsige in case you do not have access)

Option A) Upload template in Horizon

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Source the openrc.sh file of your OpenStack tenant and create the heat stack the following way:

source Downloads/vbng-openrc.sh
Please enter your OpenStack Password for project vBNG as user bng:

openstack stack create -t Downloads/vbng.yaml vbngstack

In case you would like to overwrite default parameters with your custom values, try adding '--parameter <key=value>', e.g.:

openstack stack create -t Downloads/vbng.yaml vbngstack --parameter key='your_key' --parameter flavor='your_flavor' --parameter image='your_image'

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Appendix: Stack Parameters

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OLT Onboarding Configuration

vBNG Initial Configuration by cloud-init

Once the stack is created by heat, cloud-init user data script  checks out the vbng git repository and runs the scripts 00-installdeps.sh, 01-setupdatapath.sh, 02-setupcontainers.sh contained in the repository. The parameters passed to them are kept in $HOME/vbng.conf for persistence:. Once cloud-init finished its job it will create the file $HOME/vbng_provisioning_done on your instance. Logs are kept in /var/log/cloud-init-output.log. You may re-run those scripts as many times as you wish, work will only be done once. For example you have to re-run these 3 scripts on instance reboot. Keep in mind, you may require a reboot in case you have kernel updates installed.

• vbng/00-installdeps.sh             

  • Update the system, install dependent packages, install and setup docker.

• vbng/01-setupdatapath.sh      

  • Set up the datapath part, including shaping, routing and NAT.

• vbng/02-setupcontainers.sh   

  • Update Create docker images and start all containers.

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• • : Database, Message Queue, Restconf Server, VES Agent and DHCP Server.

OLT Configuration

OLT onboarding configuration is not done by heatcloud-init, since OLT parameters are normally not known on heat at stack creation time. Therefore another script can be used once the vbng instance is provisioned:

vbng/03-setupolt.sh                 

The script takes accepts exactly 6 parameters to specify tunnel characteristics. Already configured OLTs are kept in $HOME/oltmap.txt. E.g.:

[centos@vbng ~]$ vbng/03-setupolt.sh 
Usage: vbng/03-setupolt.sh <vxlan_data_ip> <vxlan_data_port> <vxlan_data_vni> <vxlan_dhcp_ip> <vxlan_dhcp_port> <vxlan_dhcp_vni>
[centos@vbng ~]$ vbng/03-setupolt.sh 172.30.0.145 4789 88888 172.30.0.145 4789 100 
Setting up VxLAN tunnel interface olt0 (172.30.0.145:4789 VNI=88888)
Setting up VxLAN tunnel interface dhcp0 (172.30.0.145:4789 VNI=100)
Adding port dhcp0 to bride dhcp...
[centos@vbng ~]$ cat oltmap.txt 
0 datavxlan_172.30.0.145_4789_88888_dhcpvxlan_172.30.0.145_4789_100
[centos@vbng ~]$

ONT/Subscriber Configuration

Subscriber management is normally done by a host process subscribing to the message queue and configuring subscribers automatically. In case manual interaction is required those two scripts will help you out:

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• Enable a particular customer
• Usage: vbng/04-setupcustomer.sh [olt_id] [s-vlan] [c-vlan] [customer_ip] [traffic_profile_id]

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With the newest version there is a REST interface for configuring OLTs. See REST API documentation below: 'POST CreateOLT',  'GET GetOLT',  'POST DeleteOLT'. To assist with working with the REST API, you can utilize Postman, and import the current API Collection.

ONT/Subscriber Configuration

Subscribers are usually configured by calls to bbs-edge-restconf-server directly from ONAP. In case you would like to test this functionality you can of course trigger this directly with the REST API calls defined below.

Important parameters are: "remote_id":"AC9.000.990.001","s_vlan":10,"c_vlan":333 .Of course the values configured must match what the OLT/ONT in the Lab sends.

Currently only 4 subscribers profiles are supported (1/2/3/4), 2 * 100Mbit/s symmetrical and 2 * 20Mit/s symmetrical, respectively. This should be enough to run all test-cases for the BBS use-case.

REST API

To assist with working with the REST API, you can utilize Postman, and import the current API Collection.  The information below documents each REST call that is available.

POST CreateInternetProfileInstance

Description: Creates a subscriber instance in the vBNG.  This call will be used directly by ONAP.  Note, the "service_id" MUST be unique, as this is used to identify the profile for updates and deletion.

{
	"remote_id":"AC9.000.990.002",
	"ont_sn":"serial",
	"service_type":"Internet",
	"mac":"00:00:00:00:00:00",
	"service_id":"2",
	"up_speed":"100",
	"down_speed":"100",
	"s_vlan":10,
	"c_vlan":334
}

curl --location --request POST "{{host}}:{{port}}/CreateInternetProfileInstance" \
  --header "Content-Type: application/json" \
  --data "{
	\"remote_id\":\"AC9.000.990.001\",
	\"ont_sn\":\"serial\",
	\"service_type\":\"Internet\",
	\"mac\":\"00:00:00:00:00:00\",
	\"service_id\":\"1\",
	\"up_speed\":\"100\",
	\"down_speed\":\"100\",
	\"s_vlan\":10,
	\"c_vlan\":333
}"

GET GetInternetProfileInstance

Description: Returns list of all configured subscribers in the vBNG.

curl --location --request GET "{{host}}:{{port}}/GetInternetProfileInstance"

POST ChangeInternetProfileInstance

Description: Updates an existing subscriber instance in the vBNG.  The "service_id" parameter is used as the key to identify the specific profile to be updated.

{
	"remote_id":"AC9.000.990.001",
	"ont_sn":"serial",
	"service_type":"Internet",
	"mac":"00:00:00:00:00:00",
	"service_id":"1",
	"up_speed":"100",
	"down_speed":"100",
	"s_vlan":10,
	"c_vlan":333
}

curl --location --request POST "{{host}}:{{port}}/ChangeInternetProfileInstance" \
  --header "Content-Type: application/json" \
  --data "{
	\"remote_id\":\"AC9.000.990.001\",
	\"ont_sn\":\"serial\",
	\"service_type\":\"Internet\",
	\"mac\":\"00:00:00:00:00:00\",
	\"service_id\":\"1\",
	\"up_speed\":\"100\",
	\"down_speed\":\"100\",
	\"s_vlan\":10,
	\"c_vlan\":333
}"

POST DeleteInternetProfileInstance

Description: Deletes an existing subscruber instance in the vBNG

{
	"service_id":"1"
}

curl --location --request POST "{{host}}:{{port}}/DeleteInternetProfileInstance" \
  --header "Content-Type: application/json" \
  --data "{
	\"service_id\":\"1\"
}"

POST CreateOLT

Description: Creates and onboards an OLT into the vBNG.

{
	"data_dest_ip":"192.168.201.10",
	"data_dest_port":"4790",
	"data_vni":"12022",
	"dhcp_dest_ip":"192.168.201.10",
	"dhcp_dest_port":"4790",
	"dhcp_vni":"12023",
	"relay_north_ip":"172.24.24.2",
	"relay_south_ip":"10.66.0.2",
	"dhcp_l2_only":true,
	"s_vlan":300
}

curl --location --request POST "{{host}}:{{port}}/CreateOLT" \
  --header "Content-Type: application/json" \
  --data "{
	\"data_dest_ip\":\"192.168.201.10\",
	\"data_dest_port\":\"4790\",
	\"data_vni\":\"12022\",
	\"dhcp_dest_ip\":\"192.168.201.10\",
	\"dhcp_dest_port\":\"4790\",
	\"dhcp_vni\":\"12023\",
	\"relay_north_ip\":\"172.24.24.2\",
	\"relay_south_ip\":\"10.66.0.2\",
	\"dhcp_l2_only\":true,
	\"s_vlan\":300
}"

GET GetOLT

Description: Returns list of all the OLTs currently configured in the vBNG.

curl --location --request GET "{{host}}:{{port}}/GetOLT" \
  --header "Content-Type: application/json"

POST DeleteOLT

Description: Deletes an OLT instance from the vBNG.  Note, "olt_id" parameter is auto-generated by CreateOLT API call and can be retrieved via the GetOLT API call.

{
	"olt_id":1
}

curl --location --request POST "{{host}}:{{port}}/DeleteOLT" \
  --header "Content-Type: application/json" \
  --data "{
	\"olt_id\":1
}"

ONAP Configuration

The installation and initial configuration of Edge SDN M&C + vBNG is done by an Heat stack template, see above. The parameters which must be modified in ONAP are the following:

• The IP of Edge SDN M&C in order to be accessed from SDN-C is currently hardcoded in the DG -> GENERIC-RESOURCE-API_bbs-internet-profile-network-topology-operation-common-huawei.json (<parameter name='prop.sdncRestApi.thirdpartySdnc.url' value='http://172.30.0.121:5000' />). The Edge SDN M&C external controller is not registered in ESR for this release. Note: The IP above is provided by Heat stack output, it is the Floating IP of the vBNG instance in Swisscoms Lab.
• To update the IP of Edge SDN M&C in the corresponding DG, one must export the relevant DG mentioned earlier, update the IP, import back and finally enable the DG.

Setup Transport Middle Box for VxLAN Tunneling

We built our middle-boxes on top of CentOS 7. Ubuntu and other distributions will work in a similar way. The commands shown here refer to CentOS 7. The middle box can be any x86 server with two 10Gbit/s NICs. One NIC will be facing the OLT on L2, the other NIC will be in the external network to communicate with the vBNG. To set up such a middle box use these commands to configure on top of a minimal CentOS 7 installation:

• Copy the team members SSH public keys and disable SSH password auth:

  Code Block
  language bash theme RDark
  cat > authorized_keys << __EOF ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCjD/+BIg4c28lHlHw464vbfUYjfDJ1sSKgrEYcMkL+qO6LagkDAWkWdelmAmpcUJlOPYjxDwmKj8Bu6/fd+WfVzk6y33YVmAFN4jAmv/87dYCNuAMr4gDWc3cU5lsNdpsPzQqGUCFfJCvldyUZeu21YZ2rkYB1+Q9VObUSaa5Z74sKNYQJi0AgnZh63cYOyqVDCwIloWd2FzC+4o04cVL3P1R+COGRq1EUUmy5LSI9rsCO59mLCt8Wm4h5OiY84nEbQVZUH3QyYw/ihmGm2qtklkbNMPOPZ7+8ZN5+of4u/7bpEiZk3FcMh7lYwi6dMyUzwv47Il633JP6GDgOxuCH Daniel Balsiger SSH ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDH8lM+qleGIvXI3wgqIp73pKZwwxKfr9BDCdoVP3/zWRQ/7zpw98nvx7gqfVLlt+P2TjxHbSJqGrSECSmKFCHsYzuA+khmg/aca/IQa2FYFpUR1sT4czWQC14PiGGIoSbMukeUZvddZwZlalNZmOKjzY1Flz3w7+W+XHyFuwy6qfaIt1hIBKkqTUxECYq0O6OkdK6gzouKuAY/4AM+VvcIkdHMm9x3LCXWBAH24QzCG/IzydqXfi4FkVtmGJv2AgEMyR0seSoU3drCXvpY91WjXT8i6m7EMB739hw0V32UaqslY3qHtuNTGake5JFWJn9zYF6lZwGXpU94Bw7YjQL1 Michail Salichos SSH ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCRxCsboa1ERMgiJCP2iA8Zcm2LuAOALQHIZIQEvbcwMifdeXMTawC0tDnU6qy35q+cr5W3+4HJDyBLSAKmDosZepm1a/27cRlgXK/vtkxM5UlDk+lZsF/YGXBzZvWepM4XhozzCMNfvWWxkz5SnEl/ZYfdN2H5psXReNTgBX33ax2cI+aOBZxsX2Y0FYBuqlJFT7htgblGjHLq43nL/cF9w9cXkMv+mPUQJN4wNf1HU5JBjX6sKl6Y3IIPxEVGFohu8c9tDHa8JoWxIzKZz3z9Zd8KkfTTsRtXh3MH7mMRZkVTgHHVU3NA4/psEVMJHFtXI6R/laOv8Lpytdky7tkv taapeda0@UM01183 __EOF mkdir .ssh chmod 0700 .ssh cp authorized_keys .ssh # copy not move (selinux) chmod 0600 .ssh/authorized_keys rm -f authorized_keys sed -e 's|^PasswordAuthentication yes|PasswordAuthentication no|' -i /etc/ssh/sshd_config systemctl restart sshd

  
  

• Disable NetworkManager, Firewalld and Postfix services, enable legacy networking:

  Code Block
  language bash theme RDark
  systemctl disable NetworkManager systemctl stop NetworkManager systemctl disable firewalld systemctl stop firewalld systemctl disable postfix systemctl stop postfix systemctl enable network systemctl start network

  
  

• Create Network Interface Configuration Files in /etc/sysconfig/network-scripts/ :

  • ifcfg-bridge:

    Code Block
    language bash theme RDark
    DEVICE=bride TYPE=Bridge MTU=1400 ONBOOT=yes BOOTPROTO=none IPV6INIT=no IPV6_AUTOCONF=no

    
    

  • ifcfg-nic1 (facing OLT):

    Code Block
    language bash theme RDark
    DEVICE=nic1 TYPE=Ethernet MTU=1400 ONBOOT=yes BOOTPROTO=none IPV6INIT=no IPV6_AUTOCONF=no BRIDGE=bridge

    
    

  • ifcfg-nic2 (in external network, facing vBNG):

    Code Block
    language bash theme RDark
    DEVICE=nic2 TYPE=Ethernet MTU=1450 ONBOOT=yes BOOTPROTO=none IPV6INIT=no IPV6_AUTOCONF=no IPADDR=172.30.0.252 PREFIX=24 DEFROUTE=yes GATEWAY=172.30.0.1 DNS1=8.8.8.8 DNS2=8.8.4.4

    
    

• Create VxLAN Tunnel Interface on bridge creation:

  Code Block
  language bash theme RDark
  cat > /sbin/ifup-local << __EOF #!/bin/sh if [[ "\$1" == "bridge" ]] then ip link add vxlan0 type vxlan id 88888 local 172.30.0.252 remote 172.30.0.121 dstport 4789 dev nic2 ip li set up dev vxlan0 ip link set master bridge dev vxlan0 fi __EOF chmod 755 /sbin/ifup-local restorecon -Fv /sbin/ifup-local

  
  

Once those files are in place the configuration is reboot persistent. To have a sane state, please reboot the box once, after having created those files.