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| Communication protocol | |
| Purpose | Netgear level 2 switch management |
|---|---|
| Port(s) | 63321, 63322, 63323, 63324 |
| Internet protocol suite |
|---|
| Application layer |
| Transport layer |
| Internet layer |
| Link layer |
Netgear Switch Discovery Protocol (NSDP) is a management protocol for several network device families, designed by Netgear.
| Offset | Length | Meaning | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 0x0000 | 1 | Proto version – always 0x01 | |||||||
| 0x0001 | 1 | Operation code: may be 0x01 – read request, 0x02 – read response, 0x03 – write request, 0x04 – write response | |||||||
| 0x0002 | 2 | Operation result | |||||||
| 0x0004 | 4 | Unknown | |||||||
| 0x0008 | 6 | host MAC-address | |||||||
| 0x000e | 6 | network device MAC-address (value 00:00:00:00:00:00 is used as multicast address, request will be proceeded by all devices, which would receive it) | |||||||
| 0x0014 | 2 | Unknown | |||||||
| 0x0016 | 2 | Sequence number (value increments with every next request) | |||||||
| 0x0018 | 4 | Protocol signature NSDP | |||||||
| 0x001С | 4 | Unknown | |||||||
| 0x0020 | N | Message body – the sequence of TLV records | |||||||
| 0x0020 + N | 4 | End of message marker 0xFFFF0000 | |||||||
Message body records are type–length–value (TLV) structures. Type field may be one of following values in the table(list in incomplete):
| Type | Meaning |
|---|---|
| 0x0001 | Device model |
| 0x0003 | Device given name |
| 0x0004 | Device MAC-address |
| 0x0005 | Device system location |
| 0x0006 | Device current IP-address (may be unsupported by certain devices) |
| 0x0007 | Device IP-network mask (may be unsupported by certain devices) |
| 0x0008 | Router IP-address (may be unsupported by certain devices) |
| 0x000a | administration password |
| 0x000b | DHCP Mode (Refresh DHCP = 2, DHCP = 1, Static = 0) |
| 0x000d | Device Firmware version slot 1 (may be unsupported by certain devices) |
| 0x000e | Device Firmware version slot 2 (may be unsupported by certain devices) |
| 0x000f | Next active firmware slot after reboot (01 = 1, 02 = 2, may be unsupported by certain devices) |
| 0x0c00 | Speed/link status of ports |
| 0x1000 | Port Traffic Statistic |
| 0x2800 | Get VLAN info |
| 0x2c00 | Delete VLAN (write only) |
Network devices discovery (MAC-address an device model discovery):
Host with MAC=XX:XX:XX:XX:XX:XX from UDP-port 63321 or 63323 sending packet to broadcast IP-address 255.255.255.255 and UDP-port 63322 or 63324 Header @0x00000000 0x01 0x01 0x000000000000 0xXXXXXXXXXXXX 0x000000000000 0x0000 0x0001 0x4E534450 0x00000000 Body @0x00000020 0x0001 0x0000 0x0004 0x0000 Marker @0x00000028 0xFFFF0000
EACH Device responds with message like Header @0x00000000 0x01 0x02 0x000000000000 0xXXXXXXXXXXXX 0xYYYYYYYYYYYY 0x0000 0x0001 0x4E534450 0x00000000 Body @0x00000020 0x0001 0x0028 0x47 0x53 0x31 0x30 0x35 0x45 0x20*0x22 0x0004 0x0006 0xYYYYYYYYYYYY Marker @0x00000058 0xFFFF0000
Device firmware update is made with TFTP protocol, but you need to send NSDP request to turn on TFTP-server first.
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