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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.



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Posted: Thu Oct 6 23:54:13 PDT 2005
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