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Manufacturer specific management protocol
NTDS (Netgear Switch Discovery Protocol)|
Purpose | Netgear level 2 switch management |
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Port(s) | 63321, 63322, 63323, 63324 |
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Netgear Switch Discovery Protocol (NSDP) is a management protocol for several network device families, designed by Netgear.
Message structure[edit]
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[edit]
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)
|
Protocol flow examples[edit]
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[edit]
- 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[edit]
Device firmware update is made with TFTP protocol, but you need to send NSDP request to turn on TFTP-server first.
See also[edit]
External links[edit]