CORD : Starting VOLTHA Under CORD POD

This page describes bringing up VOLTHA under a CORD POD installation. The important bits of the physical POD are depicted in the diagram below. This deployment uses a single compute node and a single leaf. While another leaf and two (2) spine switches are present in the physical POD and part of the fabric configuration they are not used in the active deployment.

Head Node Network Configuration

eth0

This interface is bonded into the fabric bonding interface

eth1

This interface is a port on br-wan bridge and represents the uplink gateway for the fabric. This is used to fabric Internet traffic over the management network

eth2

This interface is the external management interface for the POD

eth3

This interface is bonded into the mgmtbond interface, which in turn is a port on the mgmtbr bridge

fabric

This interface is a bonding interface which represents the connection to the fabric on the head node. This interface is a port on the ponmgmt bridge to allow traffic from the OLTs over the fabric to connect to VOLTHA

br-wan

This interface is a bridge which represents the uplink router for the POD.

ponmgmt

This interface is a bridge the bridges communication between VOLTHA and the fabric

Compute Node Network Configuration

eth0 and eth1

These interfaces are bonded to the fabric interface for communication from the compute node to the fabric

fabric

This interface is the compute nodes link to the fabric

Process

The assumption is that VOLTHA is running inside containers on the head node. The ponmgmt interface will exist on the head node and / or will be created when VOLTHA is started.

1. Connect VOLTHA to the fabric by adding the fabric interface to the ponmgmt bridge

   sudo brctl addif ponmgmt fabric

2. Create cross connects in the fabric configuration so that the OLT can pass traffic across the fabric. The snippet below is from the full fabric configuration that is attached to this page. This just cross connect VLAN 4090 from port 129 to port 1. Port 1 is the head node and it is where VOLTHA is executing.

   "apps": {
   
   ...
   
       "org.onosproject.segmentrouting": {
         "xconnect": {
           "of:0000cc37ab7cb9d6": [
             {
               "vlan": 4090,
               "ports": [
                 1,
                 129
               ],
               "name": "OLT1_SIGNAL"
             },
             {
               "vlan": 222,
               "ports": [
                 2,
                 129
               ],
               "name": "OLT1"
             }
           ]
         },
    
   ...
    
   }

   VLAN 4090 is used to VOLTHA signal / management traffic

   VLAN 222 is used for data traffic

3. Start VOLTHA

   1. Attached is the docker-compose file used to bring up VOLTHA on the head node.

      docker-compose -f <path>/volta-compose.yml up -d