Table Of Contents
Managing Virtual Servers
Viewing Virtual Servers
Adding a Virtual Server
General
Policies
Default Policy
Client Restriction
Sticky Connections
Other
Editing a Virtual Server
General
Policies
Default Policy
Client Restriction
Sticky Connections
Other
Viewing an Individual Virtual Server
Policies
Default Policy
Backup Server Farm
Client and Sticky Connections
Other Parameters
Viewing a Policy
Viewing a Default Policy
Server Farms
Backup Server Farms
Restricted Clients
Sticky Connections
Managing Virtual Servers
Content Switching Module Device Manager (CVDM-CSM) displays details of existing virtual servers and enables users to perform detailed tasks that include creating or deleting virtual servers, associating them with server farms and policies, disallowing (or allowing) specific client IP addresses to connect to the virtual server, and turning the virtual services on or off.
Server farms that are represented as virtual servers can improve scalability and availability of services for your network. You can add new servers and remove failed or existing servers at any time without affecting the virtual server's availability.
Virtual servers represent groups of real servers and are associated with real server farms through policies. Configuring virtual servers requires setting the attributes of the virtual server, specifying the default server farm (default policy), and associating other server farms through a list of policies.
A server farm must be configured before associating it to the virtual server. Policies are processed in the order in which they are entered in the virtual server configuration.
This section includes the following topics:
•
Viewing Virtual Servers
• Viewing an Individual Virtual Server
– Viewing a Policy
– Viewing a Default Policy
• Adding a Virtual Server
• Editing a Virtual Server
Viewing Virtual Servers
Figure 4-1 Virtual Servers Page
You can view all Virtual Servers that exist on the device.
To view the Virtual Servers:
Step 1 Click Home at the top of the page.
Step 2 Click Virtual Servers under the Services Dashboard.
Or:
Step 1 Click Setup from the task bar, then click Virtual Servers in the left-most pane.
Step 2 Select Virtual Servers root node of the virtual server tree.
The following fields appear:
Field
|
Description
|
Name
|
Name of the virtual server.
|
Virtual IP Address
|
IP address of the virtual server.
|
VLAN ID
|
ID of the VLAN.
|
Protocol
|
Load-balancing protocol.
|
Port
|
TCP/UDP port number or name.
|
Server Farm
|
Name of the server farm associated to the real server.
|
Backup Farm
|
Name of the backup server farm associated to the real server.
|
Admin Status
|
Lets you know the admin status of the Virtual Server.
|
Operational Status
|
Lets you know the operational status of the Virtual Server.
|
You can group the Virtual Servers based on various common parameters.
To group the Virtual Servers, click 
at the top of the object selector.
You can select one of the following options:
•All
•Group by Protocol
•Group by Admin Status
•Group by Policies
From the Virtual Servers page, you can access functions to do the following:
•Click Add to add a Virtual Server. For more information, see "Adding a Virtual Server" section.
•Click Edit to edit a Virtual Server. For more information, see "Editing a Virtual Server" section.
•Select a row and click Delete to delete Virtual Servers.
•Click Set Admin Status to set the status of the Virtual Server instantly.
Adding a Virtual Server
You can add a Virtual Server by giving the required configuration details.
To add a new Virtual Server:
Step 1 Click Home at the top of the page
Step 2 Click Virtual Servers under the Services Dashboard.
Step 3 Click Add. The Add Virtual Server dialog box appears.
Or:
Step 1 Click Setup from the task bar, then click Virtual Servers in the left-most pane.
Step 2 Select Virtual Servers from the object selector.
Step 3 Click Add. The Add Virtual Server dialog box appears with the following tabs:
• General
• Policies
• Default Policy
• Client Restriction
• Sticky Connections
• Other
General
Click General to configure the basic configuration details.
The following details are displayed:
Field
|
Action/Description
|
Name
|
Enter the name of the Virtual Servers.
|
Status
|
From the list, select the status of the Virtual Server.
|
VLAN ID
|
Specify a VLAN for incoming traffic from the list.
|
Virtual IP Address
|
IP Address
|
Enter the IP Address of the virtual server.
|
Protocol
|
From the list, select the type of IP protocol used. You can choose between Any, TCP or UDP or enter a number between 1 and 255.
|
Port
|
From the list, select the port number. This field is enabled only when you choose TCP or UDP.
|
Service Type
|
From the list, select the service type.
|
Advertise
|
Advertise Virtual IP
Advertise only if reals are active
|
Choose between the two.
|
|
Policies
Click Policies to add or delete Policies. You have the following options:
•Click Add and select one of the following to associate policies from the Virtual Server.
–Select Policy to select a policy from a list.
–Create Policy to create a policy. For more information see "Adding Policies" section on page 7-4.
•Select a policy and click Delete to remove policies from the Virtual Server.
•Click the Up button to move the policies up in the list.
•Click the Down button to move the policies down in the list.
Note Be sure to order the policies in the correct order. The traffic will be routed based on the order of policies.
Default Policy
Click Default Policy to add the default and backup Server Farms.
The following details are displayed:
Default Server Farm
|
Click and select one of the following:
•Select Server Farm to select from a list of server farms.
•Create Server Farm to create a server farm. For more information on creating server farms, see "Adding Server Farms" section on page 5-4.
•Clear Server Farm to clear a server farm.
|
Backup Server Farm
|
Server Farm
|
Click and select one of the following:
•Select Server Farm to select from a list of server farms.
•Create Server Farm to create a server farm. For more information on creating server farms, see "Adding Server Farms" section on page 5-4.
•Clear Server Farm to clear a server farm.
|
Sticky
|
Select to enable the sticky property.
You can set the sticky option for the server farms by allowing multiple connections from the same client to stick (or attach) to the same real server.
|
Client Restriction
Click Client Restriction to add details of the restricted clients. You have the following options:
•Click Add to create client restrictions for multiple clients.
•Click Edit to edit the client restrictions for multiple clients.
•Select a row in the table and click Delete to delete the selected client restriction.
When you click Add or Edit, the following details are displayed:
Field
|
Description
|
IP Address
|
IP Address of the client.
|
Mask
|
Specify the type of IP mask. It can be from Class A, Class B, Class C or Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Exclude
|
Select the client to exclude traffic from it.
|
Sticky Connections
Click Sticky Connections to add details of the sticky connections.
The following details are displayed:
Field
|
Description
|
Sticky Timer
|
Specifies the period of time (in minutes) that the sticky information is kept.
|
Mask
|
From the list, select, Class A, Class B, Class A and Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Sticky Group
|
Click and select one of the following:
•Select Sticky Group to select from a list of Sticky Groups.
•Create Sticky Group to create a Sticky Group. For more information on creating server farms, see "Adding a Sticky Group" section on page 9-5.
•Clear Sticky Group to clear a Sticky Group.
|
Reverse Sticky Group
|
Click and select one of the following:
•Select Sticky Group to select from a list of Sticky Groups.
•Create Sticky Group to create a Sticky Group. For more information on creating server farms, see "Adding a Sticky Group" section on page 9-5.
•Clear Sticky Group to clear a Sticky Group.
|
SSL Sticky
|
Offset
|
Enter the offset for the SSL ID.
|
Length
|
Enter the length of the SSL ID.
|
Other
Click Other to add details of performance, load, and traffic- related parameters.
The following details are displayed:
Field
|
Description
|
Performance/Load Parameters
|
Idle Timer
|
Enter idle connection timer duration in seconds.
|
Pending Timeout
|
Enter the time (in seconds) to wait before a connection is considered unreachable.
|
Parse Length
|
Enter the maximum number of bytes to parse for URLs and cookies.
|
Maximum Connections
|
Enter the maximum number of connections to the real server.
|
URL Hash
|
Select this check box to enable the begin and end pattern fields.
|
Begin Pattern
|
Specify the beginning pattern of the URL to parse.
|
End Pattern
|
Specify the ending pattern of the URL to parse.
|
Connection/Traffic Parameters
|
Enable HTTP Persistence
|
Select this to enable or disable HTTP persistence for connections in the virtual server.
|
Enable Unidirectional Traffic
|
Select this to enable unidirectional traffic.
|
Editing a Virtual Server
You can monitor Virtual Servers connection details and the list of Policies for the selected Virtual Servers.
To monitor Virtual Servers:
Step 1 Click Home at the top of the page
Step 2 Click Virtual Servers under the Services Dashboard.
Step 3 Select a row from the table. Click Edit. The Edit Virtual Server dialog box appears.
Or:
Step 1 Click Setup from the taskbar, then click Virtual Servers in the left-most pane.
Step 2 Select Virtual Servers from the object selector.
Step 3 Select a row from the table. Click Edit. The Edit Virtual Server dialog box appears with the following tabs:
• General
• Policies
• Default Policy
• Client Restriction
• Sticky Connections
• Other
General
Click General to edit the basic configuration detail
The following details are displayed:
Field
|
Description
|
Name
|
Name of the Virtual Servers.
|
Status
|
From the list, select the status of the Virtual Server.
|
VLAN ID
|
From the list, select VLAN for incoming traffic from the list.
|
Virtual IP Address
|
Enter the IP Address of the Virtual Servers.
|
Protocol
|
From the list, select the type of IP Protocol used.
You can choose from Any, TCP, or UPD, or you can enter a number between 1 and 255.
|
Port
|
From the list, select the list of valid port numbers. This field is enabled only when you choose TCP or UDP.
|
Service Type
|
From the list, select the service type.
|
Advertise
|
Advertise Virtual IP
|
Select this to advertise a virtual IP.
|
Advertise only if reals are active
|
Select this to advertise only if real servers are active.
|
Policies
Click Policies to edit Policies. You have the following options:
•Click Add to associate policies from the Virtual Server. For more information see "Adding Policies" section on page 7-4.
•Click Delete to remove policies from the Virtual Server.
•Click the Up button to move the policies up in the list.
•Click the Down button to move the policies down in the list
Note Be sure to order the policies in the correct order. The traffic will be routed based on the order of policies.
Default Policy
Click Server Farms to edit a Server Farm.
The following details are displayed:
Default Server Farm
|
Click nd select one of the following:
•Select Server Farm to select from a list of server farms.
•Create Server Farm to create a server farm. For more information on creating server farms, see "Adding Server Farms" section on page 5-4.
•Clear Server Farm to clear a server farm.
|
Backup Server Farm
|
Server Farm
|
Click and select one of the following:
•Select Server Farm to select from a list of server farms.
•Create Server Farm to create a server farm. For more information on creating server farms, see "Adding Server Farms" section on page 5-4.
•Clear Server Farm to clear a server farm.
|
Sticky
|
Select to enable the sticky property.
You can set the sticky option for the server farms by allowing multiple connections from the same client to stick (or attach) to the same real server.
|
Client Restriction
Click Client Restriction to edit the details of the restricted clients.You have the following options:
•Click Add to create client restrictions for multiple clients.
•Click Edit to edit the client restrictions for multiple clients.
•Select a row in the table and click Delete to delete the selected client restriction.
When you click Add or Edit, the following details are displayed:
Field
|
Description
|
IP Address
|
IP Address of the client.
|
Mask
|
Specify the type of IP mask. It can be from Class A, Class B, Class C or Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Exclude
|
Select the client to exclude traffic from it.
|
Sticky Connections
Click Sticky Connections to edit details of the sticky connections.
The following details are displayed:
Field
|
Description
|
Sticky Timer
|
Enter the sticky time.
|
Mask
|
From the list, select Class A, Class B, Class A and Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Sticky Group
|
Click and select one of the following:
•Select Sticky Group to select from a list of Sticky Groups.
•Create Sticky Group to create a Sticky Group. For more information on creating server farms, see "Adding a Sticky Group" section on page 9-5.
•Clear Sticky Group to clear a Sticky Group.
|
Reverse Sticky Group
|
Click and select one of the following:
•Select Sticky Group to select from a list of Sticky Groups.
•Create Sticky Group to create a Sticky Group. For more information on creating server farms, see "Adding a Sticky Group" section on page 9-5.
•Clear Sticky Group to clear a Sticky Group.
|
SSL Sticky
|
Offset
|
Enter the offset for the SSL ID.
|
Length
|
Enter the length of the SSL ID.
|
Other
Click Other to edit details of performance, load, and traffic-related parameters.
The following details are displayed:
Field
|
Description
|
Performance/Load Parameters
|
Idle Timer
|
Enter idle connection timer duration (in seconds).
|
Pending Timeout
|
Enter the time (in seconds) to wait before a connection is considered unreachable.
|
Parse Length
|
Enter the maximum number of bytes to parse for URLs and cookies.
|
Maximum Connections
|
Enter the maximum number of connections to the real server.
|
URL Hash
|
Select this check box to enable the begin and end pattern fields.
|
Begin Pattern
|
Specify the beginning pattern of the URL to parse.
|
End Pattern
|
Specify the ending pattern of the URL to parse.
|
Connection/Traffic Parameters
|
Enable HTTP Persistence
|
Select this to enable or disable HTTP persistence for connections in the virtual server.
|
Enable Unidirectional Traffic
|
Select this to enable unidirectional traffic.
|
Viewing an Individual Virtual Server
You can view the configuration details of each Virtual Server when you click any of them.
Figure 4-2 Virtual Server - Individual Virtual Server Page
To monitor the individual Virtual Servers:
Step 1 Click Home at the top of the page.
Step 2 Click Virtual Servers under the Services Dashboard. Click the virtual server for which you want to view configuration details.
Or:
Step 1 Click Setup from the task bar, then click Virtual Servers in the left-most pane.
Step 2 Select Virtual Servers from the object selector.
Step 3 Click the virtual server for which you want to view configuration details.
The following fields appear:
Field
|
Description
|
Admin Status
|
Lets you know if the real server is In Service or Out of Service.
|
Operational Status
|
Lets you know the operational status of the Virtual Server.
|
Virtual IP Address
|
IP Address of the Virtual Server.
|
Protocol
|
Type of IP Protocol used. You can choose between Any, TCP or UDP or enter a number between 1 and 255.
|
Mask
|
Type of IP mask. It can be a Class A, Class B, Class C or Class D mask.
If it is not specified, the default for network mask is 255.255.255.255.
|
Port
|
Port alloted for the traffic. This field is enabled only when you choose TCP or UDP.
|
VLAN ID
|
Specifies the VLAN for incoming traffic.
|
Service Type
|
Specifies the service type.
|
Advertise
|
Advertise Virtual IP
|
Select this to advertise a virtual IP.
|
Advertise only if reals are active
|
Select this to advertise only if real servers are active.
|
Enable HTTP Persistence
|
Select this to enable or disable HTTP persistence for connections in the virtual server.
|
Enable Unidirectional Traffic
|
Select this to enable unidirectional traffic.
|
The following tabs appear:
• Policies
• Default Policy
• Backup Server Farm
• Client and Sticky Connections
• Other Parameters
Policies
Click Policies to view the details of various policies.
The following fields appear:
Field
|
Description
|
Policy Name
|
Policy associated with a virtual server.
|
Conditions
|
Cookie Map
|
Name of the cookie map associated with a policy. Only one Cookie map can be associated with a policy.
|
URL Map
|
Name of the URL map associated with a policy. Only one URL map can be associated with a policy.
|
Header Map
|
Name of the Header map associated with a policy. Only one Header map can be associated with a policy.
|
Client Group
|
Client group can either be standard access lists names or an ID between 1 to 99. Only one client-group can be associated with a given SLB policy.
|
Action
|
Server Farm
|
Name of the server farm associated to the real server. You can choose one server farm and/or backup server farm to associate to the Policy.
|
Backup Server Farm
|
Sticky Group
|
Number identifying the sticky group to which the virtual server belongs.
|
Reverse Sticky Group
|
Number identifying the reverse sticky group to which the virtual server belongs.
|
Default Policy
Click Default Policy to view the details of the default policy.
The following fields appear:
Server Farm
|
Associated Real Servers
|
Real
|
Real Server associated to the Server farms through policies.
|
Minimum Connections
|
Minimum number of connections to the real server.
|
Maximum Connections
|
Maximum number of connections to the real server.
|
Weight
|
Weight assigned to the real server. The weight identifies the capacity of the real server compared to other real servers in the server farm.
|
Admin Status
|
Lets you know the status of the real server.
|
Backup Server Farm
Click Backup Server Farm to view the details of the default policy.
The following fields appear:
Backup Server Farm
|
Associated Real Servers
|
Real
|
Real Server associated to the Server farms through policies.
|
Minimum Connections
|
Minimum number of connections to the real server.
|
Maximum Connections
|
Maximum number of connections to the real server.
|
Weight
|
Weight assigned to the real server. The weight identifies the capacity of the real server compared to other real servers in the server farm.
|
Admin Status
|
Lets you know the status of the real server.
|
Client and Sticky Connections
Click Client / Sticky Connections to view details of the restricted clients and the details related to sticky connections.
The following fields appear:
Field
|
Description
|
Client Restriction
|
IP Address
|
IP Address of the client.
|
Mask
|
Specify the type of IP mask. It can be from Class A, Class B, Class C or Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Exclude
|
Select the client to exclude traffic from it.
|
Sticky Connections
|
Sticky Timer
|
Specifies the period of time (in minutes) that the sticky information is kept.
|
Mask
|
Specifies if it is a Class A, Class B, Class A and Class D mask.
If it is not specified, the default for network mask is 255.255.255.255.
|
Sticky Group
|
Sticky Group associated with the Virtual Server.
|
Reverse Sticky
|
Number identifying the reverse sticky group to which the virtual server belongs.
|
SSL Sticky
|
Offset
|
The offset for the SSL ID.
|
Length
|
The length of the SSL ID.
|
Other Parameters
Click Other Parameters to view details of performance, load and traffic related parameters.
The following fields appear:
Field
|
Description
|
Performance/Load Parameters
|
Idle Timer
|
Duration of the idle connection timer (in seconds).
|
Pending Timeout
|
Time (in seconds) to wait before a connection is considered unreachable.
|
Parse Length
|
Maximum number of bytes to parse for URLs and cookies.
|
Maximum Connections
|
Maximum number of connections to the real server.
|
URL Hash
|
Begin Pattern
|
Specifies the beginning pattern of the URL to parse.
|
End Pattern
|
Specifies the ending pattern of the URL to parse.
|
Connection/Traffic Parameters
|
Enable HTTP Persistence
|
Enable or disable HTTP persistence for connections in the virtual server.
|
Enable Unidirectional Traffic
|
Enable unidirectional traffic.
|
Viewing a Policy
You can view the details of the conditions and actions of the policy associated with each Virtual Server.
Figure 4-3 Virtual Server - Policy Page
To the view the conditions and actions of each of the policies associated with individual Virtual Servers:
Step 1 Click Home at the top of the page.
Step 2 Click Virtual Servers under the Services Dashboard. Select the required Virtual Server and click the policy associated with it.
Or:
Step 1 Click Setup from the task bar, then click Virtual Servers in the left-most pane.
Step 2 Select Virtual Servers from the object selector. Select the required Virtual Server and click the policy associated with it.
For more information on policies associated with the individual Virtual Servers see "Viewing Policy Nodes" section on page 7-13.
Viewing a Default Policy
You can view the details of the default policy associated with each Virtual Server.
Figure 4-4 Virtual Server - Default Policy Page
To view the details of the default policy associated with the individual Virtual Servers:
Step 1 Click Home at the top of the page.
Step 2 Click Virtual Servers under the Services Dashboard.
Step 3 Select the required Virtual Server and click the default policy associated with it.
Or:
Step 1 Click Setup from the task bar, then click Virtual Servers in the left-most pane.
Step 2 Select Virtual Servers from the object selector. Select the required Virtual Server and click the default policy associated with it.
The following tabs appear:
• Server Farms
• Backup Server Farms
• Restricted Clients
• Sticky Connections
Server Farms
Click Server Farms to view details of all the Server Farms that are associated to a policy.
The following fields appear:
Field
|
Description
|
Server Farm
|
You can create or choose one Server Farm to associate to the Policy.
Click and select one of the following:
•Select Server Farm to select a Server Farm from the list.
•Create Server Farm to create a Server Farm. For more information on creating Server Farms, see "Adding Server Farms" section on page 5-4.
|
From this dialog, you can access functions to do the following:
•Click Add and do one of the following:
–Select Create Named Real Server to create a named real server. For more information, see "Adding Named Real Server" section on page 5-17.
–Select Create Unnamed Real Server to create an unnamed real server. For more information, see "Adding Unnamed Real Server" section on page 5-20.
•Select a Real Server and click Edit to edit the configuration values.
•Select a Real Server and click Delete to delete the Real Server.
For more information on Server Farms, see "Viewing Server Farms" section on page 5-2.
Backup Server Farms
Click Backup Server Farms to view details of all the Backup Server Farms that are associated to this policy.
The following fields appear:
Field
|
Description
|
Backup Server Farm
|
You can create or choose one Backup Server Farm to associate to the Policy.
Click and select one of the following:
•Select Server Farm to select a Backup Server Farm from the list.
•Create Server Farm to create a or Backup Server Farm. For more information on creating Server Farms, see "Adding Server Farms" section on page 5-4.
|
From this dialog, you can access functions to do the following:
•Click Add and do one of the following:
–Select Create Named Real Server to create a named real server. For more information, see "Adding Named Real Server" section on page 5-17.
–Select Create Unnamed Real Server to create an unnamed real server. For more information, see "Adding Unnamed Real Server" section on page 5-20.
•Select a Real Server and click Edit to edit the configuration values.
•Select a Real Server and click Delete to delete the Real Server.
For more information on Server Farms, see "Viewing Server Farms" section on page 5-2.
Restricted Clients
Click Restricted Clients to add details of the restricted clients.
The following details are displayed:
Field
|
Description
|
IP Address
|
IP Address of the client.
|
Mask
|
Specify the type of IP mask. It can be from Class A, Class B, Class C or Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Exclude
|
Select the client to exclude traffic from it.
|
Sticky Connections
Click Sticky Connections to add details of the sticky connections.
The following details are displayed:
Field
|
Description
|
Sticky Timer
|
Specifies the period of time (in minutes) that the sticky information is kept.
|
Mask
|
From the list, select From the list, select Class A, Class B, Class A and Class D masks.
If it is not specified, the default for network mask is 255.255.255.255.
|
Sticky Group
|
Specify the Sticky Group associated with the Virtual Server.
|
Reverse Sticky Group
|
Enter the number identifying the reverse sticky group to which the virtual server belongs.
|
SSL Sticky
|
Offset
|
Enter the offset for the SSL ID.
|
Length
|
Enter the length of the SSL ID.
|
