=============================================================
BIGip Cookie Captured
=============================================================
Cookie Name: BIGipServersubdomain.acme.com
Direction: Sent
Value: 2064452106.47873.0000
Path: /
Domain: .subdomain.acme.com
Expires: Thu, 21-Jul-2011 15:55:13 GMT
Source: Server
HTTP Only: No
Secure: No
=============================================================
BIGip Cookie Value 2064452106.47873.0000 Break down
=============================================================
Cookie Format: 2064452106.47873.0000
^^^^^^^^^^———————— IP Address Encoded
^^^^^————— Port Encoded
^^^^——- Reserved for future use
=============================================================
BIGip Cookie Value Decode steps IP Address
=============================================================
Cookie Format: 2064452106.47873.0000
^^^^^^^^^^———————— IP Address Encoded
1. Convert 2064452106 to HEX from DEC
2064452106 => 7B0D0A0A
2. Reverse the bytes
7B0D0A0A => 0A0A0D7B
3. Convert each byte to decimal
0A => 10
0A => 10
0D => 13
7B => 123
=============================================================
BIGip Cookie Value Encode steps IP Address
=============================================================
IP Address: 10.10.13.123
1. Convert Each octet of IP address to HEX value from DEC
10 => 0A
10 => 0A
13 => 0D
123 => 7B
2. Reverse the bytes
0A0A0D7B => 7B0D0A0A
3. Convert the HEX value to DEC
7B0D0A0A => 2064452106
=============================================================
BIGip Cookie Value Decode steps Port
=============================================================
Cookie Format: 2064452106.47873.0000
^^^^^—————- Port Encoded
1. Convert 47873 to HEX from DEC
47873d => BB01h
2. Reverse the bytes
BB01h => 01BBh
3. Convert 01BB to DEC from HEX
01BBh => 443
=============================================================
BIGip Cookie Value Encode steps Port
=============================================================
Port: 443
1. Convert 443 to HEX from DEC
443 => 01BBh
2. Reverse the bytes
01BBh => BB01h
3. Convert 01BB to DEC from HEX
BB01h => 47873
==========================================================================================================================
==========================================================================================================================
==========================================================================================================================
The persistence cookie for a host in a non-default route domain is the concatenation of:
rd
<The route domain ID>
o
00000000000000000000ffff
<The hexadecimal representation of the IP address of the pool member>
o
<The port number of the pool member>
For example, if a connection was load balanced to the 192.0.2.1%5:80 pool member, the BIG-IP system would insert the following cookie:
BIGipServer<pool_name>=rd5o00000000000000000000ffffc0000201o80
^^———————————————————— Route domain ID
^———————————————————- Delimiter
^——————————————————— Static
^^^^^^^^——— IP Address (Remove as is defined above)
^——- Delimiter
^^— Port
