Kramer KDS-USB2 Kit Manuel utilisateur

P/N: 2900-301454 Rev 1 www.kramerAV.com

USER MANUAL

MODEL:

SwitchableUSB

Device Configuration Network Protocol

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SwitchableUSB –Contents 
i 
 
Contents 
Introduction 1 
1Overview 2 
2General Information 3 
1 Generic Packet Structure 4 
2 Network Broadcast Notes 5 
3Supported Messages 6 
1 Request Device Information 7 
2 Reply Device Information 8 
3 Ping 9 
4 Acknowledge 10 
5 Request Extended Device Information 11 
6 Reply Extended Device Information 12 
7 Pair To Device 13 
8 Remove Device Pairing 14 
9 Request Device Topology 15 
10 Reply Device Topology 16 
11 Use DHCP 17 
12 Use Static IP 18 
13 Negative Acknowledge 19 
14 Use Filtering Strategy 20 
15 LED Locator On 21 
16 Led Locator Off 22 
17 Reset Device 23 
18 Request Configuration Response Data 24 
19 Reply Configuration Response Data 25 
20 Request Link Status 27 
21 Reply Link Status 28 
22 Remove All Pairings 30 
23 Force Pair To Device 31 
Appendix A 32 
1 Abbreviations 33 
3 References 34 

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SwitchableUSB –Introduction

Introduction

Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world

of unique, creative, and affordable solutions to the vast range of problems that confront the

video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we

have redesigned and upgraded most of our line, making the best even better!

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SwitchableUSB –1 Overview

1 Overview

SwitchableUSB™Device Configuration Network Protocol provides the ability to discover and

configure ExtremeUSB®extenders on a local ethernet network. The protocol works on top of UDP, so it

should be possible to write a configuration client for almost any platform. The devices will listen on

UDP port 6137 for incoming messages and replies will be sent back to the port that the request

originated from. The USB extenders will include a DHCP client that will enable them to obtain an IP

address from a DHCP server on the network. The devices may alternatively be assigned a static

network configuration using UDP broadcast packets in the form of a Use Static IP message described

later in this document.

Figure 1: USB extenders on a local network

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SwitchableUSB –2 General Information

2 General Information

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SwitchableUSB –2 General Information

2.1 Generic Packet Structure

All packets contain the following:

Magic Number

A value (0x2F03F4A2) which gives some confidence that the data

which follows is a configuration message.

Message ID

When the client sends a request, it chooses any value to insert in

this field. The device responding to the request will set this field in

the reply to the same value it received in the request.

Protocol Version

An integer from 0-255. All devices will support protocol 0 and one

other protocol version. The Reply Device Information message

will inform a client which version of the protocol it must speak in

order to communicate with the device.

Command

An integer from 0-255. This is the identifier of the command. The

combination of the protocol version and the command identify a

unique message type. In other words, command 5 in protocol 1 is

likely different from command 5 in protocol 3.

•All multi-byte fields are packed as big endian.

•Messages are at least 10 bytes and at most 136 bytes in length.

•Any string fields should be encoded using UTF-8.

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SwitchableUSB –2 General Information

2.2 Network Broadcast Notes

Further information about Network Broadcast Notes can be found at the references section.

2.2.1 Subnet Broadcast

To broadcast a packet to a subnet you only have to use the broadcast IP of the subnet. For example to

broadcast to a network configured as an IP range of 192.168.5.xxx, and a netmask of 255.255.255.0,

the IP 192.168.5.255 is the broadcast IP address. For example to broadcast to a network

configured as an IP range of 10.xxx.xxx.xxx, and a netmask of 255.0.0.0, the IP

10.255.255.255 is the broadcast IP address.

Routers will drop broadcast IP packets, destined for an address outside of the source address

device’s network; which means that any broadcast packet must originate on the same

network as the target devices.

2.2.2 All Local Subnet Broadcast

By broadcasting to the IP address 255.255.255.255 a broadcast packet can be sent out,

without previously knowing what the local network is. Microsoft Windows will however only

send the packet out the first configured network interface, so on a computer with multiple

interfaces, each interface should sent a broadcast network packet separately.

2.2.3 Mismatched Network Configuration

When broadcasting to a subnet using the network broadcast address (for example

192.168.5.255), and the device is configured for a different network (for example

IP=10.0.9.23, netmask=255.0.0.0), then the device will not respond to the broadcast as it will

not recognize the IP address as a valid broadcast.

This shouldn’t happen with a proper DHCP server allocated addresses out of the same pool

for the network. It could potentially happen when assigning static IP addresses, and moving

units between networks. If this does happen the unit will need to be reset to DHCP by the

push button, as described in the user’s guide, and then the static IP address can be assigned

to the unit.

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SwitchableUSB –3 Supported Messages

3 Supported Messages

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SwitchableUSB –3 Supported Messages

3.1 Request Device Information

This message is sent from the client to a device in order to solicit a Reply Device Information message.

This message can be sent in a broadcast UDP message in order to discover all the configurable USB

extenders on the local network.

Byte Offset

+-----------------------------------------+-----------------------------------------+

0 | Magic Number |

+ +

2 | |

+-----------------------------------------+-----------------------------------------+

4 | Message ID |

+ +

6 | |

+-----------------------------------------+-----------------------------------------+

8 | Protocol Version = 0 | Command = 0 |

+-----------------------------------------+-----------------------------------------+

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SwitchableUSB –3 Supported Messages

3.2 Reply Device Information

This message is sent from a device to a client in response to a Request Device Information

message.

3.2.1 Field Descriptions

MAC Address

The device's MAC address.

IP Address

The device's current IP address.

Network Acquisition Mode

0=DHCP, 1=Static

Supported Protocol Version

All devices must support protocol 0 and one other protocol number. This

value specifies which protocol version that is.

Vendor

A 32-byte NUL terminated string containing the device's vendor name.

Product

A 32-byte NUL terminated string containing the device's product name.

Revision

A 12-byte NUL terminated string containing the device's revision

number.

Byte Offset

+-----------------------------------------+-----------------------------------------+

0 | Magic Number |

+ +

2 | |

+-----------------------------------------+-----------------------------------------+

4 | Message ID |

+ +

6 | |

+-----------------------------------------+-----------------------------------------+

8 | Protocol Version = 0 | Command = 1 |

+-----------------------------------------+-----------------------------------------+

10 | MAC Address |

+ +

12 | |

+ +

14 | |

+-----------------------------------------+-----------------------------------------+

16 | IP Address |

+ +

18 | |

+-----------------------------------------+-----------------------------------------+

20 | Network Acquisition Mode | Supported Protocol Version |

+-----------------------------------------+-----------------------------------------+

22 | Vendor |

+ +

. . .

+ +

52 | |

+-----------------------------------------+-----------------------------------------+

54 | Product |

+ +

. . .

+ +

84 | |

+-----------------------------------------+-----------------------------------------+

86 | Revision |

+ +

. . .

+ +

96 | |

+-----------------------------------------+-----------------------------------------+

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