Netgear Switch Discovery Protocol

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

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

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

• 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)

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

• IP
• UDP
• MAC
• Netgear

• NETGEAR official site
• openSource Perl-written cross-platform toolkit for NSDP managed devices project site (in russian) Archived 2016-12-20 at the Wayback Machine
• LinNetx openSource C-written utility for ProsafePlus switches management via NSDP, not operational
• ngadmin C-written admin utility; GPLv2 license
• ProSafeLinux Remark: sparse information; FreeBSD license
• NSDP Protocol Wireshark dissector Remark: GPL license
• Nsdtool – a toolset of scripts to detect NETGEAR switches in local networks
• NETGEAR firmware update