Domain Controllers default to Required. SMB signing is controlled by the following registry parameters:. The following table summarizes the default SMB signing registry parameters. Machine role. With these default registry parameters, SMB signing is negotiated in the following manner:.
The following table lists the complete matrix for SMB registry parameters that ensure full optimization that is, bandwidth and latency optimization using the SteelHead. Signature Disabled ; SteelHead full optimization. This table represents behavior for Windows workstations and servers with service pack 3 and Critical Fix Q Prior to the critical fix, the security signature feature was not enabled or enforced even on domain controllers. Each computer has the following set of parameters: one set for the computer as a server and the other set for the computer as a client.
For the best performance, enable the clients, disable the file servers, and enable domain controllers. The following procedures assume that you have installed and configured the SteelHeads in your network. Right-click Domain Controllers and select Properties. Select the Group Policy tab. Disable Digitally sign client communication always and Digitally sign server communication always.
Disable Digitally sign client communication when possible and Digitally sign server communication when possible. Reboot all the Domain Controllers and member servers that you want to optimize. Note: You can also open a command prompt and enter gpupdate.
You can verify that SMB signing has been disabled on your domain controllers, member servers, and clients. Copy some files in Windows from the server to the client through the SteelHeads. Connect to the Management Console. Look for the SMB signing warnings in red.
For example, look for the following text:. Click Default Domain Controllers Policy. Click Edit. If a file is not optimized for more than one user at a time, it might be because an application lock on it prevents other applications and the SteelHead from obtaining exclusive access to it.
Without an exclusive lock, the SteelHead cannot perform latency for example, read-ahead and write-behind optimization on the file. Without opportunistic locks oplocks , RiOS SDR and compression are performed on file contents, but the SteelHead cannot perform latency optimization because data integrity cannot be ensured without exclusive access to file data.
While PC1 has the file open, it takes PC2 significantly longer to open the file. Note: You can check connection bandwidth reduction in the Bandwidth Reduction report in the Management Console. To prevent any compromise to data integrity, the SteelHead only accelerates access to data when exclusive access is available.
Therefore, even without the benefits of latency optimization, SteelHeads might still increase WAN performance, but not as effectively as when application optimized connections are available. A fat pipe is a network that can carry large amounts of data without significantly degrading transmission speed.
If you have a fat pipe that is not being fully utilized and you are experiencing WAN congestion, latency, and packet loss as a result of the limitations of regular TCP, consider the solutions outlined in this section.
Important: We recommend that you enable HS-TCP only after you have carefully evaluated whether it will benefit your network environment. This section includes the following topics:. The MTU specifies the largest datagram packet Layer-3 packet that a device supports.
The in-path MTU supports jumbo frame configuration. For optimized traffic, the SteelHeads act as a proxy. A separate inner TCP connection is established between SteelHeads, with a potentially different MTU size from the original client-to-server connection.
When a SteelHead detects that a session can be optimized, it initiates a TCP session to the remote SteelHead using the IP flag don't fragment with packet size up to the value configured in the interface MTU default bytes. In line with RFC , if a router or device along the TCP path of the session possibly originating a GRE tunnel does not support the packet size, and because it is not allowed to fragment the packet, it can request the originator the SteelHead to reduce the packet size.
It does this with an ICMP type 3, code 4 34 packet that carries the desired maximum size and the sequence number of the packet exceeding the router's interface MTU. The issue is defining a sending rate in which it might not be practical to determine the bandwidth that a client can receive on their mobile device because it is unknown and variable. Riverbed recommends that you gather WAN delay commonly expressed as RTT , packet-loss rates, and link bandwidth to better understand the WAN characteristics so that you can make adjustments to the default transport streamlining settings.
Also, understanding the types of workloads long-lived, high-throughput, client-to-server traffic, mobile, and so on is valuable information for you to appropriately select the best transport streamlining settings. Specific settings for high-speed data replication are covered in Storage Area Network Replication. The settings described in this chapter approximate when you can adjust the transport streamlining settings to improve throughput. The default SteelHead settings are appropriate in most deployment environments.
Based on RTT, bandwidth, and loss, you can optionally choose different transport streamlining settings. A solid approach to selecting the TCP algorithm found on the Transport Settings page is to use the automatic detection feature auto-detect on the data center SteelHead.
The benefit to automatic detection is that the data center SteelHead reflects the choice of TCP algorithm in use at the remote site. A general guideline is that any connection over 50 Mbps can benefit from using HS-TCP, unless connection is over satellite delay greater than ms.
When you are factoring in loss at lower-speed circuits, consider using bandwidth estimation. When planning, consider when packet loss is greater than 0. Typically, MPLS networks are below 0. For any satellite connection, the appropriate choices are SCPS if licensed or bandwidth estimation.
For specific implementation details, see Satellite Optimization. For asymmetry, you can have the WAN-send buffer reflect the bandwidth and delay in the transmit direction, while the WAN-receive buffer reflects the bandwidth and delay in the receive direction.
Note that you do not have to adjust the buffer settings unless there is a relatively small number of connections and you want to consume most or all of the available WAN bandwidth.
You can apply application-specific optimization for specific application protocols. Protocol-specific optimization reduces the number of round trips over the WAN for common actions and help move through data obfuscation and encryption by:. Developed by Riverbed, management streamlining simplifies the deployment and management of RiOS devices.
This includes both hardware and software:. For more information, see Auto-Discovery Protocol. Most configurations have only one profile per Gigabit Ethernet interface. Riverbed recommends maximizing the number of profiles configured for each GigE port to increase the total number of TCP connections. In the profile setting, the default maximum and minimum bandwidth settings per FCIP profile are Mbps and Mbps, respectively.
You can achieve better performance for unoptimized and optimized traffic using Mbps and Mbps. If you are doing unoptimized runs , configure the bandwidth and latency settings in the MDS to reflect the actual network conditions of the WAN link.
These settings improve performance in terms of enabling the MDS to fill-the-pipe with unoptimized runs in the presence of latency. You can keep the tunnel configuration default settings, with the following key exceptions:. Always use this option when testing with SteelHeads in the presence of latency. By default, when first establishing FCIP connectivity, each MDS normally tries to constantly initiate new connections in both directions, and it is difficult to determine which side ends up with the well-known destination port for example, This behavior can make it difficult to interpret SteelHead reports.
When you set one side to Passive, the nonpassive side always initiates connections, hence the behavior is deterministic. By default, this setting is 2: one for Control traffic, and one for the Data traffic. Do not change the default value. Separating the Control and Data traffic has performance implications because FC is highly jitter sensitive. You must disable it when the SteelHead is optimizing.
On the MDS the default setting is off. However, when adding SteelHeads to an existing environment, it should be disabled. Cisco-style configurations typically do not show the default values for example, compression is off by default, and it is not present in this configuration dump.
Configure MDS1. Configure MDS2. Best Practices for a RiOS 5. Note: tcp adv-win-scale -1 is for RiOS 5. Note: in-path kickoff-resume is for RiOS 6. Make sure that this value matches the settings on your router or switch. Set the primary interface speed? Enter the duplex mode on the primary interface. The default value is auto. Set the primary interface duplex?
Enter yes at the system prompt to configure in-path support. An in-path configuration is a configuration in which the SteelHead is in the direct path of the client and server. For detailed information about in-path configurations, see the SteelHead Deployment Guide. Would you like to activate the in-path configuration? Enter the in-path, LAN interface speed. Set the in-path: LAN interface speed? Enter the in-path, LAN duplex value. Set the in-path: LAN interface duplex?
Enter the in-path, WAN interface speed. Set the in-path: WAN interface speed? Enter the in-path, WAN duplex speed. Make sure that this value matches the setting on your router or switch. Set the in-path: WAN interface duplex? Would you like to activate the in-path configuration: yes. In-Path IP address: The SteelHead configuration wizard automatically saves your configuration settings. To log out of the system, enter this command at the system prompt:.
Perform these tasks to verify that you have properly connected the SteelHead. Verify that you can connect to the CLI using one of these devices:. It must have these settings: baud, 8 bits, no parity, 1 stop bit, vt, and no flow control. At the system prompt, enter this command:. You are prompted for the administrator password. This is the password you set in the configuration wizard. At the system prompt, ping from the management interface:.
At the system prompt, ping from the in-path default gateway:. If you have problems connecting to the SteelHead, use this flow chart to trouble shoot issues.
Figure: Resolving IP connectivity. After you configure the SteelHead, you can check and modify your configuration settings and view performance reports and system logs in the Management Console. You can connect to the Management Console through any supported Web browser.
To connect to the Management Console, you must know the host, domain, and administrator password that you assigned in the configuration wizard. Note: Cookies and JavaScript must be enabled in your Web browser. This is a self-signed certificate that provides encrypted Web connections to the Management Console.
The system recreates the certificate when you change the appliance hostname or when the certificate expires. Note: Alternatively, you can specify the IP address instead of the host and domain. Figure: Sign in page.
The default signin is admin. Users with administrator admin privileges can configure and administer the SteelHead. Users with monitor privileges can view the SteelHead reports, view user logs, and change their own password. In the Password text box, type the password you assigned in the configuration wizard of the SteelHead. The SteelHead is shipped with the default password: password. Click Sign In to display the Dashboard. Perform these tasks to verify that you have properly configured the SteelHead.
Map a remote drive on a client machine. Drag and drop a 1 MB file from the client to the remote server. Drag and drop the 1 MB file again. If you selected auto-negotiation auto for your in-path and primary interfaces, you must ensure that the SteelHead negotiated the speed and duplex at the rate your devices expect.
Check the system logs for duplex or speed errors cyclic redundancy check CRC or frame errors. Next, examine the peer switch user interface to check its link configuration. If the configuration on one side is different from the other, traffic is sent at different rates on each side, causing many collisions. To troubleshoot, change both interfaces to automatic duplex negotiation.
You can enable or disable the alarm for a specific interface. In an out-of-path deployment, the SteelHead is not in the direct path between the client and the server.
For detailed information about out-of-path deployments, see the SteelHead Deployment Guide. Connecting out-of-path SteelHead s to your network.
You use a standard Ethernet straight-through cable to connect the primary port of the SteelHead to the LAN switch in an out-of-path configuration. This can be any port on your LAN switch that is configured to connect to a host. Figure: Connecting the primary port and LAN switch.
The configuration wizard automatically starts when you log in to the SteelHead CLI for the first time. For detailed information about the configuration wizard and how to start it, see To run the configuration wizard. In an out-of-path configuration, the client-side SteelHead is configured as an in-path device and the server-side SteelHead is configured as an out-of-path device. Check the duplex and speed settings on the router and switch that connects to your SteelHead.
Make sure that the settings on the router, switch, and the SteelHead match. Connect to the CLI. The default value is set to riverbedcontroller.
Note: If you mistakenly answer no , to return to the wizard from the CLI, enter the configuration jump-start command from configuration mode.
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