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NTDS (Netgear Switch Discovery Protocol) Purpose Netgear level 2 switch management Port(s) 63321, 63322, 63323, 63324
Netgear Switch Discovery Protocol (NSDP ) is a management protocol for several network device families, designed by Netgear .
Message structure
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 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):
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
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)
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 0x0000FFFF
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 0x0000FFFF
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.
See also
External links
