Siemens optipoint 410 s v6.0 Manual Do Utilizador
XML Configuration Management
A31003-J4260-M101-2-76A9, 03-2007
2-8
XML Configuration Management, Administrator Manual
xml_02.fm
Installation
2.4.1.1
Further Information on Option 43 (DHCP Support)
As there is no DHCP option for exchanging VLAN information via DHCP, the "Vendor Specific
Information" option (43) is used to encapsulate VLAN and download information.
Information" option (43) is used to encapsulate VLAN and download information.
1
The follow-
ing diagram illustrates the format of the "Vendor Specific" option.
Byte 1 contains tag "43", "Option 1 data" contains the "Siemens" identifier. The "VLAN ID" is
contained in "Option 2". Five padding bytes (starting at byte 20) and the "Terminate Option 255"
tag in byte 25 complete the option frame.
contained in "Option 2". Five padding bytes (starting at byte 20) and the "Terminate Option 255"
tag in byte 25 complete the option frame.
You must enter the server values if you have to specify a configuration download server for the
configuration update. You can enter the new option before or after the VLAN information but
the five padding bytes (value 0) and the "Terminate Option 255" tag must close the option
frame.
configuration update. You can enter the new option before or after the VLAN information but
the five padding bytes (value 0) and the "Terminate Option 255" tag must close the option
frame.
Example:
Code: 3
Length: 21
File: ftp://ftp.siemens.com (or https://www.siemens.com, for example)
The five padding bytes and the "Terminate Option 255" tag now complete the option frame in
byte 48.
byte 48.
1. Data is transferred from the application layer to the transport layer, where it is assigned a TPC or UDP header
and split into datagrams. The transport layer forwards the datagrams to the network layer which divides them
into packets and assigns them headers.
into packets and assigns them headers.
Byte #
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25
Description
Code
Length
Code
Length
Option 1 data - "Siemens" identifier
Code
Length
Option 2 data - to
be allocated VID
be allocated VID
Padding
Padding
Padding
Padding
Padding
Code
Value
43 20 1
10 ’S’ ’i’
’e’
’m’ ’e’
’n’
’s’
0
0
0
2
4
0
0
VID HI
VID LO
0
0
0
0
0
255
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
Code
Length
Option 1 data - "ftp server address"
P
adding
P
adding
P
adding
P
adding
P
adding
Code
3
21 ’f’
’t’
’p’ ’:’ ’/’
’/’ ’f’
’t’ ’p’ ’.’
’s’ ’i’
’e’ ’m’ ’e’ ’n’ ’s’
’.’
’c’ ’o’ ’m’ 0
0
0
0
0
255