Kbase P179950: How to determine correct UDP broadcast address for NameServer Load Balancing
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
04/01/2011 |
|
Status: Unverified
GOAL:
How to determine correct UDP broadcast address for NameServer Load Balancing
GOAL:
What is the method to calculate UDP broadcast address when NameServer Load Balancing is being used
FACT(s) (Environment):
All Supported Operating Systems
OpenEdge 10.x
FIX:
In order to determine correct address to specify for UDP broadcasting, it is necessary to know
IP address as well as the network subnet mask.
UDP broadcast address is a bitwise OR operation between IP address and inverted subnet mask.
Example:
IP address is 192.168.200.1 and subnet mask is 255.255.252.0
192.168.200.001 = 11000000 10101000 11001000 00000001
255.255.252.0 = 11111111 11111111 11111100 00000000
For the broadcast address you need to to perform logical OR with
IP address and the inverted subnet mask :
11000000 10101000 11001000 00000001
00000000 00000000 00000011 11111111
===================================
11000000 10101000 11001011 11111111
=
192.168.203.255
Another example for 192.168.203.45 and the same subnet mask:
255.255.252.0 = 11111111 11111111 11111100 00000000
inverted subnet = 00000000 00000000 00000011 11111111
192.168.203.045 = 11000000 10101000 11001011 00101101
=====================================================
11000000 10101000 11001011 11111111
=
192.168.203.255