Alteon Application Switch Operating System Application Guide
Persistence
Document ID: RDWR-ALOS-V2900_AG1302 595
Example 4: Using Rewrite Cookie Mode
A Rewrite server cookie with the encrypted real server IP address
In cookie rewrite mode, if the cookie length parameter is configured to be 28 bytes, Alteon
rewrites the placeholder cookie value with the encrypted real server IP address:
If the server is configured to include a placeholder cookie, such as
Set-Cookie:
sid=alteonpersistence;
, then Alteon rewrites the first 28 bytes of the cookie to include the
server's encrypted IP address:
Set-Cookie: sid=alteonpersistence;.
All subsequent traffic from a specific client with this cookie is directed to the same real server.
B Rewrite server cookie with the encrypted real server IP address and virtual server IP address
If the cookie length is configured to be 28 bytes, Alteon rewrites the cookie value with the
encrypted real server IP address and virtual server IP address:
If the server is configured to include a placeholder cookie as
Set-Cookie:
sid=alteonpersistence;
, then Alteon rewrites the first 28 bytes of the cookie to include the
encrypted real server IP address and virtual server IP address:
Set-Cookie:
sid=cdb20f04cdb20f0a;
All subsequent traffic from a specific client to the particular virtual server IP address with this
cookie is directed to the same real server.
Server-Side Multi-Response Cookie Search
Cookie-based persistence requires Alteon to search the HTTP response packet from the server and,
if a persistence cookie is found, set up a persistence connection between the server and the client.
Alteon looks through the first HTTP response from the server. While this approach works for most
servers, some customers with complex server configurations might send the persistence cookie a
few responses later. In order to achieve cookie-based persistence in such cases, Alteon lets the
network administrator configure Alteon to search through multiple HTTP responses from the server.
In Alteon, the network administrator can modify a response counter to a value from 1 through 16.
Alteon looks for the persistence cookie in this number of responses (each of them can be multi-
frame) from the server.
Configuring Server-Side Multi-Response Cookie Search
The following is an example procedure for configuring a server-side multi-response cookie search.
To configure the server-side multi-response cookie search
>> # /cfg/slb/virt 1/service 80/pbind cookie rewrite sid dis
>> # /cfg/slb/virt 1/service 80/pbind cookie rewrite sid dis
>> # /cfg/slb/virt <virtual server> /service 80/http/rcount
Current Cookie search response count:
Enter new Cookie search response count [1-16]:
To Next Page
Loading...
Need help?
General