Netgear Switch Discovery Protocol

Netgear Switch Discovery Protocol (NSDP) is a management protocol for several network device families, designed by Netgear.

Message body record structure
Message body records are type–length–value (TLV) structures. Type field may be one of following values in the table(list in incomplete):

Protocol flow examples
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 support for protocol

 * GS105E ProSAFE Plus
 * GS108E ProSAFE Plus
 * GS724T
 * GS748T
 * FS116E (IP-network description and Firmware version TLVs are not supported)
 * FS726TP (uses 63323 and 63324 UDP-ports for interconnection)

Devices firmware update
Device firmware update is made with TFTP protocol, but you need to send NSDP request to turn on TFTP-server first.