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LAWO RAVENNA Networking Manual
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LAWO RAVENNA Networking Manual

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RAVENNA
Networking Guide
Version: 1.0/3
Edition: 19 September 2015

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Summary of Contents for LAWO RAVENNA

  • Page 1 RAVENNA Networking Guide Version: 1.0/3 Edition: 19 September 2015...
  • Page 2 All rights reserved. Permission to reprint or electronically reproduce any document or graphic in whole or in part for any reason is expressly prohibited, unless prior written consent is obtained from the Lawo AG. All trademarks and registered trademarks belong to their respective owners. It cannot be guaranteed that all product names, products, trademarks, requisitions, regulations, guidelines, specifications and norms are free from trade mark rights of third parties.

  • Page 3: Table Of Contents

    Table of Contents Table of Contents Welcome Data Network Requirements Selecting Components Network Switch Configuration Appendices Glossary RAVENNA Networking Guide V1.0/3...

  • Page 4: Welcome

    This manual describes the data network requirements which must be supported if you wish to stream audio across an IP network using RAVENNA. Topics include general prerequisites, selecting components and network switch configuration. We recommend that you read this document carefully before purchasing or installing components intended for use with RAVENNA.

  • Page 5: Data Network Requirements

    (routers and switches) must support the following requirements. All are common data networking features. However, they are not supported by every network switch. Please DO NOT attempt to connect RAVENNA streaming nodes using an unknown or unqualifying IP network. If you do so, correct streaming operation cannot be guaranteed.

  • Page 6: Selecting Components

    Selecting Components Selecting Components This section deals with choosing the right components for your RAVENNA network including cables, switches and SFP modules (for fibre optic conversion): Cables · · Switches · SFPs (Fibre Optic Conversion) V1.0/3 RAVENNA Networking Guide...
  • Page 7 Selecting Components Cables Cables All of Lawo's RAVENNA devices support copper Ethernet cabling (see below). In addition, some devices support optical fibre ports by fitting one of the Lawo-certified modules. Copper Connections Choose an Ethernet cable and connector that meets the following specification: ·...
  • Page 8 Please refer to the "RAVENNA for mc /Nova73 User Guide" for details. All other Lawo RAVENNA IO cards require an external media converter (copper to fibre). Many network switches also support fibre optic connection via SFP or GBIC modules; please check the switch manufacturer's specifications for details.
  • Page 9 Selecting Components Switches Switches In order to create a RAVENNA network you will need a Layer 2 switch, or switches, that meet the following requirements: 1. Transmission Speed = Gigbit Ethernet A Gigabit Ethernet switch operating at 1000 Mbit/s is recommended, as opposed to Fast (100 Mbit/s) or Standard (10 Mbit/s) Ethernet.
  • Page 10 Services Code Point) values are implemented (this system is known as DiffServ). The default DSCP values are DSCP 56 (C7) = PTP clock signals; DSCP 46 (EF) = RAVENNA media streams; DSCP 0 (BE) = all other network traffic. You should check that your network switch is configured to support and prioritise the correct DSCP classes, and that the default values have not been altered.
  • Page 11 Switches Evaluated Network Switches The following network switches have been evaluated by Lawo. This list is from working and proven setups, and is subject to change at any time. Note that the only switch recommended for professional audio and/or video installation, at this time, is the Arista 7150S.

  • Page 12: Network Switch Configuration

    (and configure) the equivalent options. You should configure the network switch first, before connecting the RAVENNA-enabled devices. Note that our example configures the switch for a single vLAN (virtual Local Area Network). However, if the network is large or the switch is to be used for other devices (Control System, Service ports, company network, etc.), then it is a good idea to divide the network traffic by creating separate vLANs.
  • Page 13 Before connecting you should download the latest firmware release for the network switch onto your computer - for example: It is also recommended to use a TFTP server tool such as Tftpd64 (or Tftpd32 for 32-bit windows systems), for the file transfers. This can be downloaded from http://tftpd32.jounin.net/. RAVENNA Networking Guide V1.0/3...
  • Page 14 The IP address must be unique, and set within the same range as that of the port you are connecting to (i.e.the first three fields must match). For example, to connect to a network switch which has an IP address of 192.168.101.254, you could set your computer's IP address to 192.168.101.67. V1.0/3 RAVENNA Networking Guide...
  • Page 15 · Firewall or Antivirus Software - some software may interfere with web browser communication. Try disabling your Firewall and/or Antivirus to eliminate them as the cause of the problem. For further assistance, consult your switch documentation. RAVENNA Networking Guide V1.0/3...
  • Page 16 Use the tabs on the left to select the different pages of switch settings. For full details, you should consult the CISCO switch documentation. Here we will focus on the settings and options which must be adjusted to support a RAVENNA streaming network. If an option is not mentioned, then it should be left at its default setting.
  • Page 17 Start the TFTP server tool and adjust the settings as shown below - this will bind the TFTP server to your computer's IP address (e.g. 192.168.101.67) and prepare it for the file transfer: Global Settings TFTP Settings Select Browse and choose the firmware update file which you downloaded earlier. RAVENNA Networking Guide V1.0/3...
  • Page 18 · TFTP Server Destination = By IP address (Version 4) · TFTP Server IP Address/Name = enter the IP address of your TFTP server (in our example 192.168.101.67). · Source File Type = the firmware version filename The complete setup should look like this: V1.0/3 RAVENNA Networking Guide...
  • Page 19 Network Switch Configuration Installing New Firmware Select Apply to begin the file transfer - you will see the upload in progress: RAVENNA Networking Guide V1.0/3...
  • Page 20 Network Switch Configuration Installing New Firmware After a successful upload, the following screen appears: Click on the active image link to make the firmware image active, and then Reboot the switch: V1.0/3 RAVENNA Networking Guide...
  • Page 21 Click on the flashing Save icon, or select Administration -> File Managerment -> Copy/Save Configuration, to open the copy/save page. Select the Running configuration as the Source File Name and the Startup configuration as the Destination File Name. RAVENNA Networking Guide V1.0/3...
  • Page 22 Network Switch Configuration Editing and Saving Changes Click Apply and then OK to confirm the operation: When the copy is complete, you will see the following confirmation: V1.0/3 RAVENNA Networking Guide...
  • Page 23 Network Switch Configuration No Jumbo Frames No Jumbo Frames RAVENNA streaming cannot support Jumbo Frames, and therefore, this option should be disabled: RAVENNA Networking Guide V1.0/3...
  • Page 24 No Green Ethernet / EEE / Power Saving It is important that any Energy Efficient Ethernet (EEE), otherwise known an Green Ethernet, or power saving features are disabled, as these can interfere with RAVENNA's clock signals and real-time buffering: V1.0/3...
  • Page 25 Spanning Tree - Rapid & Filtering Spanning Tree - Rapid & Filtering The Spanning Tree State should be Enabled, with the STP status set to Rapid STP and BPDU Handling to Filtering (as opposed to Flooding): RAVENNA Networking Guide V1.0/3...
  • Page 26 Multicast (with IGMP Snooping & Port Filtering) RAVENNA streaming uses IPv4 multicast (as opposed to unicast). It also requires IGMPv2 snooping to be enabled, and ports to be filtered (to prevent the forwarding of unwanted network traffic). This requires a number of settings to be adjusted: Bridge Multicast Filtering Status should be Enabled.
  • Page 27 Under IPv4 Multicast Configuration, IGMP Snooping should be enabled - tick the global Enable options beside IGMP Snooping Status and IGMP Querier Status. This enables IGMP Snooping for all configured vLAN ports (in our example, there is a single vLAN): RAVENNA Networking Guide V1.0/3...
  • Page 28 However, if you are using other switches (not in Auto mode), then you must make sure that there is only one querier and enter the IP address of the Querier switch. Otherwise, multiple IGMP messages will be sent. V1.0/3 RAVENNA Networking Guide...
  • Page 29 Network Switch Configuration Multicast (with IGMP Snooping & Port Filtering) Under IPv6 Multicast Configuration, similar settings should be adjusted for MLD Snooping: RAVENNA Networking Guide V1.0/3...
  • Page 30 The next three steps will reduce unwanted network traffic by not forwarding any unwanted or unregistered Multicast traffic (i.e. packets that do not belong to a Multicast group) Under Multicast Router Port, all ports should be set to None: Under Forward All, all ports should be set to None: V1.0/3 RAVENNA Networking Guide...
  • Page 31 Network Switch Configuration Multicast (with IGMP Snooping & Port Filtering) Under Unregistered Multicast, change all ports from Forwarding to Filtering: RAVENNA Networking Guide V1.0/3...
  • Page 32 Quality of Service (QoS) Quality of Service (QoS) A Quality of Service (QoS) setup is used to prioritise different types of network data. So, for example, RAVENNA timing information and audio streams MUST take priority over all other types of network traffic.In Lawo's RAVENNA devices, the following DSCP classes are implemented.
  • Page 33 Network Switch Configuration Quality of Service (QoS) Set the QoS Queue options to Strict Priority: RAVENNA Networking Guide V1.0/3...
  • Page 34 · All other DSCP classes = 1 or 2 (low priority). Note that the other DSCP classes are not important to RAVENNA, but may be used to prioritise other network traffic such as Voice-over-IP. Therefore, you should consult your network administrator before determining the usage of values 1 and 2.
  • Page 35 Network Switch Configuration Quality of Service (QoS) Select QoS Advanced Mode -> Global Settings and set the Trust Mode = DSCP. This will ensure that the QoS uses the DSCP table values (entered in step 3): RAVENNA Networking Guide V1.0/3...
  • Page 36 Network Switch Configuration Saving Changes Saving Changes When all changes have been made, remember to copy the Running configuration to the Startup configuration: V1.0/3 RAVENNA Networking Guide...
  • Page 37 · Current Directory - choose the directory where the TFTP backup files will be stored. · Server interfaces - select the Network Interface Card (on your computer) which is connected to the CISCO switch. In our example, this is the NIC using the IP address of 192.168.1.101: RAVENNA Networking Guide V1.0/3...
  • Page 38 IP conflict.) Reset the IP address of the destination switch, using the Administration -> Management Interface -> IPv4 Interface page. Repeat steps 5 & 6 for the other switches in the RAVENNA network. V1.0/3 RAVENNA Networking Guide...
  • Page 39 In the current release, this takes the form of a specially configured DALLIS sync frame which converts incoming Wordclock, from the master sync reference, to PTP. In other Lawo systems, you should consider installing a PTP Grandmaster. Currently, Lawo recommends using Meinberg clock generators.

  • Page 40: Appendices

    Appendices Appendices The following appendices cover additional information you may find useful: · Running a PING Test The OSI Reference Model · · RAVENNA Streaming: a User's View V1.0/3 RAVENNA Networking Guide...
  • Page 41 Type ping xxx.xxx.xxx.xx (where xx.. is the IP address of the device you are trying to connect to) and press Enter. For example, to test the connection to a mc 56 control system (using its default IP address), you would type: ping 192.168.102.56 Your computer will now try to establish communication... RAVENNA Networking Guide V1.0/3...
  • Page 42 If the ping test is successful, then the result will show that the Sent packets have been successfully Received: This confirms that the network communication is working. If you still cannot connect, then something on your computer is blocking the network connection. Try disabling any firewall and/or antivirus software. V1.0/3 RAVENNA Networking Guide...
  • Page 43 Network Routers operate at this layer and communicate via IP (Internet protocol). Layers 4 to 7 are the application and protocol-based layers. The first three layers are the most important for Audio-over-IP. RAVENNA Networking Guide V1.0/3...
  • Page 44 RAVENNA Streaming: a User's View While the OSI reference model provides a technician's view of RAVENNA technology, this can be simplified into the following end-user's view: Layer 1 is the Audio Transport which is handled by the data network. Layer 2 is the Virtual Patching which is handled in the background by the Zone Controller.

  • Page 45: Glossary

    For example, to provide low-latency for critical network traffic such as media streaming, while providing best-effort services to non-critical services such as web traffic or file transfers. The default DSCP value for RAVENNA streams is 46 (=EF); and for PTP is 56 (=CS7).
  • Page 46 Precision Time Protocol. An ultra-precise, Synchronization method used in data networks. The PTPv2 protocol can be used as the sync reference for all RAVENNA devices in a network. Quality of Service The QoS defines the overall performance of a computer network. Several factors are considered: error rates, bandwidth, throughput, transmission delay, availability, jitter, etc.
  • Page 47 Glossary RAVENNA A real-time, network-synchronised Audio over IP protocol. RAVENNA offers real-time distribution of audio and other media content within IP- based network environments. Remote MNOPL The remote control protocol RemoteMNOPL is a LAN based client-server network byte order protocol to enable third party systems to control Lawo’s digital mixing consoles or standalone routers.