Radware Alteon Application Manual page 201

• Content-intelligent load balancing, which requires traffic to go to specific real servers based on
the inspection of HTTP headers, content identifiers such as URLs and cookies, and the parsing of
content requests.
For more information see
When DAM is enabled, port mapping and default gateway load balancing is supported only when
filtering is enabled, a proxy IP address is configured, or URL parsing is enabled on any port.
Blocking Direct Access Mode on Selected Services
When Direct Access Mode (DAM) is enabled globally on Alteon, it can also be disabled on selected
virtual servers and virtual services.
Example
You have enabled direct access mode on Alteon so that it can support content-intelligent load
balancing applications such as those described in
page 219.
However, you also want to load balance a stateless protocol such as UDP, which by its nature cannot
be recorded in a session entry in the session table.
To block use of DAM for the UDP protocol (service port 9200)
>> Main# /cfg/slb/adv/direct e
>> /cfg/slb/virt 1/service 9200/direct disable
Notes
• The
/cfg/slb/virt <x> /service <y> /direct
globally on Alteon. If DAM is not enabled globally on Alteon, the
has no effect. When DAM is enabled on Alteon and disabled on a virtual server/virtual port pair,
direct access to other real servers (those servers that are not servicing a virtual server/virtual
port pair with direct access mode disabled) is still allowed.
• DAM cannot be disabled for FTP and RTSP services.
Direct Access Mode Limitations
In the default SLB configuration with client and server on separate VLANs and Direct Access Mode
disabled, a server response fails to reach the client if the server sends the response to the MAC
address present in the client request.
The response does reach the client if one of the following conditions are met:
• The server sends the response to the MAC address of the default gateway (the Alteon interface
or the virtual interface router).
• Direct Access Mode is enabled at /cfg/slb/adv/direct.
• MAC address substitution is enabled at /cfg/slb/adv/submac.
Document ID: RDWR-ALOS-V2900_AG1302
Alteon Application Switch Operating System Application Guide
Content-Intelligent Server Load Balancing, page
Content-Intelligent Server Load Balancing,
Server Load Balancing
219.
(Enable DAM globally on Alteon)
command requires that DAM be enabled
direct disable
command
201