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Manual Chapter: Configuring CIFS Optimization for a One-Arm Deployment
Manual Chapter
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Overview: CIFS traffic optimization in a one-arm deployment

Common Internet File System (CIFS) is one type of application traffic that requires a second application-specific virtual server (optimized application) on the receiving side of the iSession™ connection. Bidirectional CIFS application traffic requires that both client and server virtual servers be created on the BIG-IP WOMs on both sides of the WAN. When you configure BIG-IP® WOM® to optimize CIFS traffic in a one-arm deployment, you must manually create these virtual servers.

In a bridge or routed deployment, the Quick Start screen automatically creates these optimized applications when you select and apply them. In a one-arm deployment, you specify only one VLAN, that is, the WAN VLAN. The BIG-IP WOM system cannot determine whether to create the optimized application on this VLAN for inbound or outbound traffic, so you must create both of them manually.

Task summary

In a one-arm deployment, to optimize CIFS traffic bidirectionally across the WAN, you must manually create custom optimized applications (virtual servers) for both outbound (client) and inbound (server) CIFS traffic. You can also create a virtual server to prevent CIFS traffic from using NetBIOS service port 139, thus forcing CIFS traffic to use port 445.

Configuring WAN optimization for outbound CIFS traffic

The optimized application for outbound CIFS traffic is a virtual server that sends CIFS traffic to the server-side network through an iSession™ connection.
  1. On the Main tab, click WAN Optimization > Optimized Applications > Create Outbound .
  2. In the Name field, type a descriptive name, such as cifs_client.
  3. From the Port list, select CIFS. The screen refreshes and displays 445 in the Port field. It also displays the Application Profile field with cifs selected.
  4. Retain the defaults for the remaining settings.
  5. Click Finished. The optimized application cifs_client appears on the Optimized Application List screen.
The following screen capture is an example of the completed New Optimized Application screen for CIFS outbound traffic.
Example of completed Outbound Application Configuration screen for CIFS traffic

Configuring WAN optimization for inbound CIFS traffic

The optimized application for inbound CIFS traffic is a virtual server that receives CIFS traffic from the server, after the iSession-terminating virtual server has terminated the iSession™ connection.
  1. On the Main tab, click WAN Optimization > Optimized Applications > Create Inbound.
  2. In the Destination field, select Network, and type the network address and mask of the client-side network.
  3. In the Name field, type a descriptive name, such as cifs_server.
  4. From the Port list, select CIFS. The screen refreshes and displays 445 in the Port field. It also displays the Application Profile field with None selected.
  5. Retain the default for Enabled WAN VLANs.
  6. Click Finished. The optimized application cifs_server appears on the Optimized Application List screen.
The following screen capture is an example of the completed New Optimized Application screen for CIFS outbound traffic.
Example of completed Inbound Application Configuration screen for CIFS traffic

Creating a virtual server to reject NetBIOS traffic

Configure a virtual server to prevent CIFS traffic from using NetBIOS service port 139, thus, forcing CIFS traffic to use port 445.
Note: For any settings not specifically called out, retain the default values.
  1. On the Main tab, click Local Traffic > Virtual Servers . The Virtual Server List screen displays a list of existing virtual servers.
  2. Click the Create button. The New Virtual Server screen opens.
  3. In the Name, field, type a unique and descriptive name for the virtual server, such as netbios_reject.
  4. In the Destination field, select Network, and type the network address and mask of the client-side network.
  5. In the Service Port field, type 139.
  6. For the State setting, retain the default value, Enabled.
  7. In the Configuration area of the screen, from the Type list, select Reject.
  8. In the WAN Optimization area of the screen, from the iSession Profile list, select isession-cifs.
  9. From the CIFS Profile list, select cifs.
  10. Click Finished.
The virtual server netbios_reject is added to the list of available virtual servers.
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