Cisco Systems OL-12518-01 manual Configuring TCP Parameters on CPE Cisco MDS, Configuring the MTU

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Chapter 4 FCIP over IP/MPLS Core

Testing Scenarios and Results

Figure 4-11 Cisco MDS 9216i Connection to GSR MPLS Core

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Configuring TCP Parameters on CPE (Cisco MDS 9216)

A simple ping command from the Cisco MDS 9000 CLI, provides the RTT between the two IP addresses. RTT is specified as part of the following configuration command. It may be specified in either microseconds (-us suffix) or in milliseconds (-ms suffix).

The following command shows RTT set for 20 milliseconds:

tcp max-bandwidth-mbps XXXX min-available-bandwidth-mbps xxxx round-trip-time-ms 20

Configuring the MTU

The MTU is the maximum payload the Gigabit Ethernet interface will handle. The default MTU for the Gigabit Ethernet interface is 1500, which does not include Ethernet headers and trailers.

The maximum Fibre Channel frame size including headers and trailers is 2148 bytes. Fibre Channel data frames in typical storage applications have a payload of 2048 bytes plus 36 bytes in headers and trailers, leaving a frame size of 2084 bytes. The Cisco MDS 9000 optionally adds two headers to the Fibre Channel frame. The EISL header is an eight-byte field carrying VSAN tagging information that is only added if the FCIP interface is defined as a TE_Port. If the EISL header is present, it is located immediately after the four-byte start-of-frame (SOF) sequence. There is also an optional header (up to 16 bytes) that is reserved for future use.

With the inclusion of EISL and optional headers, the maximum Fibre Channel frame size is 2172 bytes. An FCIP packet over Ethernet includes 94 to 98 bytes of headers, plus a four-byte Ethernet CRC32 trailer. When carrying the maximum size Fibre Channel frame, the maximum Ethernet frame size is 2274 bytes (2172 + 98 + 4 = 2274).

 

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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 Window Size TCP Maximum BandwidthTCP Minimum Available Bandwidth Cisco Round Trip TimeIPS Module Cisco MDS Cisco FcipMultiprotocol Services Module CPE Selection-Choosing between the 9216iQoS Requirements in Fcip Applications Synchronous ReplicationAsynchronous 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 ArchitectureTesting Scenarios and Results Lab Setup and TopologyTest Objectives VPN VRF-Specific Configurations MP BGP Configuration-PE1Gigabit Ethernet Interface Configuration-PE1 VRF Configuration-PE1MP BGP Configuration-PE2 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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