Cisco Systems OL-12518-01 manual Cisco, Round Trip Time, IPS Module

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Chapter 4 FCIP over IP/MPLS Core

Using FCIP Tape Acceleration

The min-available-bwparameter provides the necessary control. Even in the presence of drops, the sender tries aggressively to reach the value configured for this parameter. Even if the congestion window is decreased because of drops, it is increased again on every send so that it is not less than the configured minimum bandwidth.

Round Trip Time

RTT is a measure of the latency or delay back and forth over the FCIP tunnel. RTT is typically twice the end-to-end or one-way delay. Note that IP packets can take different paths each way through a network, so the unidirectional delays are not always equal.

You must configure an appropriate estimate for the RTT. An underconfigured RTT may cripple FCIP throughput. In SAN-OS 1.3 and later releases, the RTT is automatically adjusted from its initial setting.

The configured RTT value is used to calculate the initial TCP MWS and the appropriate TCP window scaling factor. Based on the dynamic RTT, the actual TCP MWS is adjusted dynamically within the bounds of the initially chosen TCP scaling factor.

Customer Premises Equipment (CPE)—Cisco 9216/9216i and Cisco 7200

Cisco 9216

The Cisco MDS 9216 Multilayer Fabric Switch brings new functionality and investment protection to the fabric switch market. Sharing a consistent architecture with the Cisco MDS 9500 Series, the Cisco MDS 9216 combines multilayer intelligence with a modular chassis, making it the most intelligent and flexible fabric switch in the industry. Starting with 16 2/1-Gbps auto-sensing Fibre Channel ports, the MDS 9216 expansion slot allows for the addition of any Cisco MDS 9000 Family modules for up to 48 total ports.

The modular design of the Cisco MDS 9216 allows it to support any Cisco MDS 9000 Family switching or storage services module. The available modules include the following:

•16-port and 32-port 2/1-Gbps auto-sensing Fibre Channel switching modules

•IP Storage Services Module supporting iSCSI and FCIP over eight ports of 1-Gbps Ethernet

•Advanced Services Module providing in-band storage virtualization and switching services

•Caching Services Module supporting fabric-based storage virtualization with integrated data caching

Optionally configurable, these modules give the Cisco MDS 9216 Multilayer Fabric Switch unparalleled functionality and versatility.

IPS Module

The IP Storage (IPS) Services Module is the heart of FCIP service. The flexible IP storage services (4-port and 8-port configurations) deliver both FCIP and iSCSI IP storage services. The iSCSI functionality is software configurable on a port-by-port basis.

The IPS module offers the following:

•Simplified business continuance and storage consolidation—Uses widely known IP to cost-effectively connect to more servers and more locations over greater distances than previously possible.

 

Data Center High Availability Clusters Design Guide

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OL-12518-01

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Contents Overview A P T E RTypical Customer Requirements SAN Extension Through SP NetworkCompression Compression Support in Cisco MDS2shows a comparison of the Cisco compression solutions Compression Modes and RateCisco Compression Solutions SecurityCisco Encryption Solutions VPNSM-DES, 3DES MDS MPS-DES, 3DES, AES192Using Fcip Tape Acceleration Write AccelerationTCP Operations TCP ParametersTCP Maximum Bandwidth TCP Window SizeTCP Minimum Available Bandwidth Round Trip Time CiscoIPS Module Cisco MDS Cisco FcipMultiprotocol Services Module CPE Selection-Choosing between the 9216iQoS Requirements in Fcip Synchronous Replication ApplicationsAsynchronous Replication Service Offerings over Fcip Service Offering Scenario A-Disaster RecoveryService Offering Scenario B-Connecting Multiple Sites Fcip over SP IP/MPLS Core for Disaster Recovery SolutionsService Offering Scenario C-Host-based Mirroring SP MplsMpls VPN Core CPEUsing VRF VPNs Mpls VPN for Storage ArchitectureLab Setup and Topology Testing Scenarios and ResultsTest Objectives VPN VRF-Specific Configurations MP BGP Configuration-PE1MP BGP Configuration-PE2 Gigabit Ethernet Interface Configuration-PE1VRF Configuration-PE1 Gigabit Ethernet Interface Configuration-PE2VRF Configuration-PE2 Scenario 1-MDS 9216i Connection to GSR Mpls CoreConfiguring TCP Parameters on CPE Cisco MDS Configuring the MTUScenario 2-Latency Across the GSR Mpls Core ThroughputScenario 3-Cisco MDS 9216i Connection to Cisco 7500 PE/GSR P Scenario 4-Impact of Failover in the Core Scenario 5-Impact of Core Performance17shows the MDS Fcip and compression latency Application Requirements Compression Ratio ComparisonsRemote Tape-Backup Applications Conclusion

OL-12518-01 specifications

Cisco Systems OL-12518-01, also known as the Cisco Management Services for Wireless LAN Controller, is a key component for businesses seeking to enhance their wireless networking capabilities. This product offers a comprehensive management solution designed to ensure high performance and security of wireless networks.

One of the main features of OL-12518-01 is its centralized management interface, which simplifies the deployment and operation of multiple access points across an organization. This centralized approach allows network administrators to manage all wireless devices from a single pane of glass, significantly improving operational efficiency and reducing the potential for human error.

The product is built upon various robust technologies that enhance its performance. It includes advanced features like Quality of Service (QoS) support, which prioritizes bandwidth for critical applications. This ensures that mission-critical operations run smoothly, even in environments with high user density. Furthermore, the Wireless LAN Controller supports a variety of security protocols, including WPA3, ensuring that user data and wireless networks are protected against unauthorized access.

A significant characteristic of OL-12518-01 is its scalability. As businesses grow, their network requirements can change dramatically. The Cisco Management Services solution is designed to scale easily alongside the organization’s needs, allowing for the addition of more access points and the integration of advanced features seamlessly. This adaptability makes it suitable for both small businesses and large enterprises, ensuring consistent wireless connectivity across diverse spaces.

Moreover, OL-12518-01 features robust analytics and reporting capabilities. It provides valuable insights into network performance and user behavior, enabling administrators to make informed decisions about resource allocation and troubleshooting. With real-time monitoring tools, IT staff can quickly identify and resolve issues, minimizing downtime and enhancing overall user experience.

In summary, Cisco Systems OL-12518-01 is a powerful wireless LAN management solution that combines centralized management, advanced security features, scalability, and comprehensive analytics. These characteristics make it an ideal choice for organizations aiming to optimize their wireless networking performance while ensuring security and reliability in their operations. By investing in OL-12518-01, businesses can achieve a robust wireless infrastructure that meets their current and future needs.
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