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Virtual Server
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The number of the virtual server: 1 to 256.
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Virtual Service
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The number of the virtual service: 1 to 8.
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Virtual Port
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The number of the virtual port: 2 to 65,534.
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Real Group
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The number of the real group: 1 to 256.
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Real Server Port
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Defines the real server TCP or UDP port assigned to this service. By default, this is the same as the virtual port (service virtual port). If the real port is different from the virtual port, the switch will map the virtual port to this real port. The port range is 0 to 65,534.
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UDP Balancing
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Enables or disables UDP load balancing for a virtual port (disabled by default). You can configure this option if the service(s) to be load balanced include UDP and TCP. For example, DNS uses UDP and TCP. In those environments, you must activate UDP balancing for the particular virtual servers with which clients will communicate using UDP. The options are enabled, disabled, stateless. The default is disabled.
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Cookie Persistence Mode
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Sets cookie persistence mode:
- Rewrite: In active cookie mode (or cookie rewrite mode), the switch, and not the network administrator, generates the cookie value on behalf of the server. The switch intercepts this persistence cookie and rewrites the value to include server-specific information before sending it to the client.
NOTE: In Rewrite mode, the Virtual Server parameter Cookie Length can only be 8 or 16. Also, the Virtual Server parameter Cookie Offset is invalid in rewrite mode.
- Passive: In this mode, the network administrator configures the Web server to embed a cookie in the server response that the switch looks for in subsequent requests from the same client.
- Insert: When a client sends a request without a cookie, the server responds with the data, and the switch inserts a persistence cookie into the data packet. The switch uses this cookie to bind to the appropriate server.
NOTE: If set to Insert mode, the Virtual Server parameters Cookie Name, Cookie Offset, Cookie Length and Expire Cookie are invalid.
- Disabled. The default is disabled.
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Persistent Binding
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Set persistent binding: enabled, disabled, session id, or cookie. The default is disabled.
NOTE: If persistent binding type is not set to Cookie, the Virtual Server parameters Cookie Name, Cookie Offset, Cookie Length and Expire Cookie are invalid.
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Host Name
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Sets the host name for a service. This is used with Domain Name to create a full host/domain name for individual services. The maximum string length is 9 characters. The default is none.
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HTTP SLB 1st
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Sets the HTTP load balancing precedence as one of the following.
- disabled-- (the default setting) Disables HTTP SLB configuration.
- urlslb--Enables URL SLB.
- urlhash--Enables hashing based on URL.
- cookie--Enables cookie-based SLB for cookie-based preferential load balancing. You must also set the following virtual server settings: Cookie name, starting point of the cookie value, number of bytes to be extracted, enable/disable checking for cookie in URL.
- headerhash--hashes on any http header value.
- host--Enables virtual hosting.
- browser--Enables SLB based on browser type.
- others--Requires inputs for a particular header field.
Use with the Operator and HTTP SLB 2nd fields to combine or select applications.
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Operator
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Sets the logical operator (and, or, none) used to combine applications selected for the 1st HTTP SLB and the 2nd HTTP SLB. The default is none.
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HTTP SLB 2nd
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Sets 2nd HTTP load balancing consideration as one of the following: disabled, URLSLB, URLhash, cookie, headerhash, host, browser, or others. The default is disabled. See HTTP SLB 1st (above) for definitions. Use with the Operator and HTTP SLB 1st fields to combine or select applications.
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No NAT
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Enables or disables substitution of only the real server's MAC address (disabled by default). This option does not substitute IP addresses. It is used for Direct Server Return (DSR) in an one-armed load balancing setup, so that frames returning from server to the client do not have to pass through the switch. The default is disabled.
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Remap UDP Fragments
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Enables or disables remapping UDP Fragments.
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RTSP Balancing
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Enables (hash or pattern) or disables Real Time Streaming Protocol (RTSP) URL balancing. RTSP Balancing can enable URL hashing using the entire URL except the extension (.xxx) at the end of the URL. The default is disabled.
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Delayed Binding
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Enables or disables Layer 4 Delayed Binding for TCP service and ports. Enabling this command protects the server from Denial of Service (DoS) attacks. This option is disabled by default. The default is disabled.
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FTP Parsing
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Enables or disables FTP SLB parsing for this virtual server. When this option is enabled, the WSM modifies the appropriate FTP method/command to support FTP servers on a private network for both active and passive FTP modes. To do this, the switch looks deeper into the packet and modifies the port command for active FTP or the "entering the passive mode" command for passive FTP.The default is disabled.
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DNS Query Load Balancing
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Enables or disables DNS-based Layer 7 content load balancing.
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BWM Contract
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Sets the number of the bandwidth management contract. For more information, see Bandwidth management.
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