commit	e538dfd02a00e442c78b426f3abf3bb5ebec1877	[log] [tgz]
author	Girish Gowdra <girish@opennetworking.org>	Mon Sep 30 11:07:30 2019 +0530
committer	Girish Gowdra <girish@opennetworking.org>	Thu Oct 03 12:20:35 2019 +0530
tree	738751175ddfea2ffb15f4533b430e2d419cecd8
parent	1f1280be197b17dced6ba6bba00767ec07604497 [diff]

tree: 738751175ddfea2ffb15f4533b430e2d419cecd8

README.md

OpenOLT agent

The OpenOLT agent runs on white box Optical Line Terminals (OLTs) and provides a gRPC-based management and control interface to OLTs.

The OpenOLT agent is used by VOLTHA through the OpenOLT adapter.

OpenOLT agent uses Broadcom's BAL (Broadband Access Layer) software for Maple/Qumran chipsets based OLT such as the EdgeCore/Accton ASFVOLT16.


  +---------------------------------+
  |             VOLTHA              |
  |                                 |
  |       +------------------+      |
  |       | OpenOLT adapter  |      |
  +-------+--------+---------+------+
                   |
  OpenOLT gRPC API |
                   |
+--------------------- ---------------+
|                  |                  |
|         +------------------+        |
|         |   OpenOLT agent  |        |
|         +--------+---------+        |
|                  |                  |
| Vendor specific  | (e.g. Broadcom   |
|       API        |     BAL API      |
|                  |                  |
|         +------------------+        |
|         | Vendor SoC/FPGA  |        |
|         |(e.g Maple/Qumran)|        |
|         +------------------+        |
|                                     |
|           White box OLT             |
+-------------------------------------+

Hardware requirements

A list of tested devices and optics can be found in the CORD hardware requirements guide, in the R-CORD access equipment and optics section.

Pre-built debian packages of OpenOLT agent for Accton/Edgecore ASFVOLT16

Accton/Edgecore makes available pre-built debian packages of OpenOLT agent to their customers. Contact your Accton/Edgecore representative for more information.

The pre-built debian packages have been tested on this specific version of OpenNetworkingLinux (ONL).

More info on how to install ONL can be found on the official ONL website.

Install OpenOLT

Copy the debian package to the OLT. For example:

scp openolt.deb root@10.6.0.201:~/.

Install the openolt.deb package using dpkg:

dpkg -i openolt.deb

Run OpenOLT as a Linux service

Rebooting the OLT (after the installation) will start dev_mgmt_daemon and openolt as init.d services:

Rebooting the OLT will start the dev_mgmt_daemon and openolt services:

reboot

The services can also be stopped/started manually:

service dev_mgmt_daemon stop
service openolt stop
service dev_mgmt_daemon start
service openolt start

Check the status of the services:

service dev_mgmt_daemon status
service openolt status

Run OpenOLT in foreground

Running the dev_mgmt_daemon and/or openolt services in the forground is useful for development and debugging. Make sure to first stop the services if they are running in background.

Open a terminal and run the Broadcom BAL software (dev_mgmt_daemon):

cd /broadcom
./dev_mgmt_daemon -d -pcie

The dev_mgmt_daemon executable, when run in foreground, presents the CLI for Broadcom's BAL - Broadband Access Layer which is useful for debugging.

While the first executable still runs (even in background), open another terminal and run openolt:

cd /broadcom
./openolt

NOTE: the two executables will remain open in the terminals, unless they are put in background.

Connect from VOLTHA

At the VOLTHA CLI, preprovision and enable the OLT:

(voltha) preprovision_olt -t openolt -H YOUR_OLT_MGMT_IP:9191
(voltha) enable

Additional notes

9191 is the TCP port that the OpenOLT agent uses for its gRPC channel
In the commands above, you can either use the loopback IP address (127.0.0.1) or substitute all its occurrences with the management IP of your OLT

Build OpenOLT

Supported BAL API versions

Currently, OpenOLT supports Broadcom's BAL API, version 3.1.1.1.

Proprietary software requirements

The following proprietary source code is required to build the OpenOLT agent.

SW-BCM68620_<BAL_VER>.zip - Broadcom BAL source and Maple SDK
sdk-all-<SDK_VER>.tar.gz - Broadcom Qumran SDK
ACCTON_BAL_<BAL_VER>-<ACCTON_VER>.patch - Accton/Edgecore's patch

The versions currently supported by the OpenOLT agent are:

SW-BCM68620_3_1_1_1.tgz
sdk-all-6.5.13.tar.gz
ACCTON_BAL_3.1.1.1-V201908010203.patch

NOTE: the repository does not contain the above three source packages. These are needed to build the OpenOLT agent executable. Contact Broadcom to access the source packages.

System Requirements

OpenOLT agent builds on Ubuntu 16.04 LTS.

Build procedure

Clone the openolt repository either from GitHub or from OpenCORD Gerrit:

git clone git@github.com:opencord/openolt.git
or
git clone https://gerrit.opencord.org/openolt

Copy the Broadcom source and patch files to the openolt/agent/download directory:

cd <dir containing Broadcom source and patch files>
cp SW-BCM68620_3_1_1_1.tgz sdk-all-6.5.13.tar.gz ACCTON_BAL_3.1.1.1-V201908010203.patch <cloned openolt repo path>/agent/download

Run Autoconfig to generate the appropriate makefile scaffolding for the desired target

cd openolt
./configure

Run make prereq to install the package dependencies. This is usually a one-time thing, unless there is a change in the dependencies.

make OPENOLTDEVICE=asfvolt16 prereq

Run make. This can take a while to complete the first time, since it builds ONL and the Broadcom SDKs. Following runs will be much faster, as they only build the OpenOLT agent source.

make OPENOLTDEVICE=asfvolt16

If the build process succeeds, libraries and executables will be created in the openolt/agent/build directory.

Optionally, build the debian package that will be installed on the OLT.

make OPENOLTDEVICE=asfvolt16 deb

If the build process succeeds, the openolt.deb package will be created as well in the openolt/agent/build directory.

Cleanup

To cleanup the repository and start the build procedure again, run:

make OPENOLTDEVICE=asfvolt16 clean-all

FAQ

The information here may be specific to specific OLT and ONU hardware such as Edgecore ASFVOLT16 OLT and Broadcom based ONUs.

How to change speed of ASFVOLT16 NNI interface?

Auto-negotiation on the NNI (uplink) interfaces is not tested. By default, the OpenOLT agent sets the speed of the NNI interfaces to 100G. To downgrade the network interface speed to 40G, add the following lines at the end of the qax.soc (/broadcom/qax.soc) configuration file. A restart of the dev_mgmt_daemon and openolt executables is required after the change.

port ce128 sp=40000

This change can also be made at run-time from the CLI of the bal_core_dist:

d/s/shell
port ce128 speed=40000

(It is safe to ignore the error msgs.)

Why does the Broadcom ONU not forward eapol packets?

The firmware on the ONU is likely not setup to forward 802.1x on the linux bridge. Drop down to the shell in the Broadcom ONU's console and configure the Linux bridge to forward 802.1x.

> sh
# echo 8 > /sys/class/net/bronu513/bridge/group_fwd_mask

Version 1.7 of VOLTHA has a known issue where the ONU is only able to pass EAPOL packets from a specific LAN port (e.g. LAN port 1 on ALPHA ONUs)

How do I check packet counters on the ONU?

LAN port packet counters:

bs /b/e port/index=lan{0,1,2,3,4,5,6}

WAN port packt counters:

bs /b/e port/index=wan0

How do I check packet counters on the OLT's PON interface?

Following is an example of retrieving the interface description for PON intf_id 0 (TODO: document PON interface numbering for Edgecore OLT).

BCM.0> a/t clear=no object=pon_interface sub=itu_pon_stats pon_ni=0
[-- API Start: bcmolt_stat_get --]
[-- API Message Data --]
object: pon_interface- PON Network Interface.
get stat subgroup: itu_pon_stats-ITU PON Statistics. loid: 0 response: OK
key={pon_ni=0}
data={
  fec_codewords=0
  bip_units=0
  bip_errors=0
  rx_gem=0
  rx_gem_dropped=0
  rx_gem_idle=0
  rx_gem_corrected=0
  rx_crc_error=0
  rx_fragment_error=0
  rx_packets_dropped=0
  rx_dropped_too_short=0
  rx_dropped_too_long=0
  rx_key_error=0
  rx_cpu_omci_packets_dropped=0
  tx_ploams=157
  rx_ploams_dropped=0
  rx_allocations_valid=0
  rx_allocations_invalid=0
  rx_allocations_disabled=0
  rx_ploams=39
  rx_ploams_non_idle=39
  rx_ploams_error=0
  rx_cpu=0
  rx_omci=0
  rx_omci_packets_crc_error=0
  tx_packets=0
  tx_gem=0
  tx_cpu=0
  tx_omci=0
  tx_dropped_illegal_length=0
  tx_dropped_tpid_miss=0
  tx_dropped_vid_miss=0
  tx_dropped_total=0
  rx_xgtc_headers=39
  rx_xgtc_corrected=0
  rx_xgtc_uncorrected=0
  fec_codewords_uncorrected=0
  rx_fragments_errors=0
}
[-- API Complete: 0 (OK) --]

How do I check packet counters on the OLT's NNI interface?

Following command retrieves NNI intf_id 0:

BCM.0> a/t clear=no object=nni_interface sub=stats id=0
[-- API Start: bcmolt_stat_get --]
[-- API Message Data --]
object: nni_interface- nni_interface.
get stat subgroup: stats-NNI Interface Statistics. loid: 0 response: OK
key={id=0}
data={
  rx_bytes=40023
  rx_packets=283
  rx_ucast_packets=0
  rx_mcast_packets=283
  rx_bcast_packets=0
  rx_error_packets=0
  rx_unknown_protos=0
  tx_bytes=0
  tx_packets=0
  tx_ucast_packets=0
  tx_mcast_packets=0
  tx_bcast_packets=0
  tx_error_packets=0
}
[-- API Complete: 0 (OK) --]

How do I list flows installed in the OLT?

In the dev_mgmt_daemon CLI:

> ~, Debug/, Maple/, Board/, Cld/, Transport/, Logger/, Quit
> Debug
.../Debug> Rsc_mgr/, Mac_util/, Switch/, sLeep, sHow_config, os/
> Mac_util
.../Mac_util> Print_flows, pRint_flows_for_gem, prInt_flows_for_alloc_id, Epon_helper
> Print_flow