Cisco Systems IC-23 Setting the Token Rotation Time, Setting the Transmission Valid Timer, IC-41

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Configuring LAN Interfaces

Configuring a Fiber Distributed Data Interface

Setting the Token Rotation Time

You can set the FDDI token rotation time to control ring scheduling during normal operation and to detect and recover from serious ring error situations. To do so, use the following command in interface configuration mode:

Command

Purpose

 

 

fddi token-rotation-time microseconds

Sets the FDDI token rotation time.

 

 

The FDDI standard restricts the allowed time to be greater than 4000 microseconds and less than 165,000 microseconds. As defined in the X3T9.5 specification, the value remaining in the token rotation timer (TRT) is loaded into the token holding timer (THT). Combining the values of these two timers provides the means to determine the amount of bandwidth available for subsequent transmissions.

Setting the Transmission Valid Timer

You can set the transmission timer to recover from a transient ring error by using the following command in interface configuration mode:

Command

Purpose

 

 

fddi valid-transmission-time microseconds

Sets the FDDI valid transmission timer.

 

 

Controlling the Transmission Timer

You can set the FDDI control transmission timer to control the FDDI TL-Min time, which is the minimum time to transmit a Physical Sublayer or PHY line state before advancing to the next Physical Connection Management or PCM state as defined by the X3T9.5 specification. To do so, use the following command in interface configuration mode:

Command

Purpose

 

 

fddi tl-min-time microseconds

Sets the FDDI control transmission timer.

 

 

Modifying the C-Min Timer

You can modify the C-Min timer on the PCM from its default value of 1600 microseconds by using the following command in interface configuration mode:

Command

Purpose

 

 

fddi c-minmicroseconds

Sets the C-Min timer on the PCM.

 

 

Cisco IOS Interface Configuration Guide

IC-41

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Contents IC-23 Configuring an Ethernet or Fast Ethernet InterfaceIC-24 Ethernet and Fast Ethernet Interface Configuration Task ListSpecifying an Ethernet Encapsulation Method Specifying an Ethernet or Fast Ethernet InterfaceIC-25 Specifying Full-Duplex Operation Specifying the Media and Connector TypeIC-26 Extending the 10BASE-T Capability Configuring Fast Ethernet 100BASE-TIC-27 IC-28 Configuring PA-12E/2FE Port AdapterIC-29 Configuring the PA-12E/2FE Port AdapterIC-30 IC-31 Monitoring and Maintaining the PA-12E/2FE Port AdapterIC-32 Configuring the 100VG-AnyLAN Port Adapter Configuring Fast EtherChannelIC-33 IC-34 Fast EtherChannel Configuration Task ListIC-35 Configuring the Port-Channel InterfaceIC-36 Configuring the Fast Ethernet InterfacesIC-37 Configuring a Fiber Distributed Data InterfaceIC-38 Using Connection Management InformationSpecifying a Fddi Fddi Configuration Task ListIC-39 Enabling Fddi Bridging Encapsulation Enabling Full-Duplex Mode on the FddiIC-40 Modifying the C-Min Timer Setting the Token Rotation TimeSetting the Transmission Valid Timer Controlling the Transmission TimerControlling SMT Frame Processing Modifying the TB-Min TimerModifying the Fddi Timeout Timer Setting the Bit ControlIC-43 Setting Fddi Frames Per Token LimitControlling the CMT Microcode Starting and Stopping FddiIC-44 Configuring a Hub InterfaceControlling the Fddi SMT Message Queue Size Preallocating Buffers for Bursty Fddi TrafficIC-45 Enabling a Hub PortDisabling or Enabling Automatic Receiver Polarity Reversal Disabling or Enabling the Link Test FunctionEnabling Snmp Illegal Address Trap Enabling Source Address ControlIC-46 IC-47 Configuring a LAN Extender InterfaceConnecting a LAN Extender to a Core Router Expanded View of the Connection to a Core RouterManagement of the LAN Extender Interface Installing a LAN Extender at a Remote SiteDiscovering the MAC Address Upgrading Software for the LAN ExtenderIC-49 Configuring the LAN ExtenderConfiguring and Creating a LAN Extender Interface LAN Extender Interface Configuration Task ListIC-50 IC-51 Defining Packet FiltersIC-52 Filtering by MAC Address and Vendor CodeIC-53 Controlling Priority QueueingIC-54 Controlling the Sending of Commands to the LAN ExtenderDownloading a Software Image to the LAN Extender Restarting the LAN ExtenderIC-55 IC-56 Troubleshooting the LAN ExtenderIC-57 System OKIC-58 Configuring a Token Ring InterfaceEnabling Early Token Release Token Ring Interface Configuration Task ListDedicated Token Ring Port Adapter Specifying a Token Ring InterfaceMonitoring and Maintaining the Port LAN Interface Configuration ExamplesConfiguring PCbus Token Ring Interface Management Enabling Token Ring Concentrator PortIC-61 Ethernet Encapsulation Enablement ExampleFull Duplex Enablement Operation Example PA-12E/2FE Port Configuration ExamplesIC-62 PA-VG100 Port Adapter Configuration ExampleIC-63 Fast EtherChannel Configuration ExamplesIC-64 Fddi Frames Configuration ExampleIC-65 Hub Configuration ExamplesHub Port Startup Examples Hub Port Shutdown ExamplesMAC Address Filtering Example LAN Extender Enablement Interface ExampleLAN Extender Interface Access List Examples Snmp Illegal Address Trap Enablement for Hub Port ExampleIC-67 Ethernet Type Code Filtering ExampleIC-68

IC-23 specifications

Cisco Systems IC-23 is a robust networking device designed to address the ever-evolving demands of modern enterprises. As part of Cisco's extensive portfolio, the IC-23 serves as an ideal solution for organizations seeking to enhance their network performance, reliability, and scalability.

One of the standout features of the Cisco IC-23 is its high-speed connectivity options. With support for both wired and wireless communications, this device can seamlessly integrate into a wide range of network architectures. It offers multiple Gigabit Ethernet ports, enabling rapid data transfer and facilitating the connection of numerous devices without compromising performance.

Another key characteristic of the IC-23 is its advanced security protocols. Data breaches and cyber threats are persistent concerns in today's digital landscape, and Cisco addresses these challenges head-on with robust security measures. The IC-23 incorporates features such as firewall capabilities, intrusion detection systems, and secure VPN support, ensuring that sensitive information remains protected while traversing the network.

The IC-23 also leverages Cisco's renowned software-defined networking (SDN) capabilities. This technology allows businesses to manage their network resources dynamically, ensuring optimal performance based on real-time demands. As a result, organizations can easily adjust their network configurations to meet fluctuating workloads, enhancing both efficiency and cost-effectiveness.

Scalability is another critical feature of the IC-23, making it an excellent choice for growing companies. Cisco has designed this device to accommodate increasing data traffic without necessitating a complete overhaul of existing infrastructure. This adaptability ensures that organizations can expand their networks smoothly as their operations evolve.

Moreover, the IC-23 supports a variety of network management tools, providing IT teams with the insights needed to monitor performance and troubleshoot issues proactively. Cisco's user-friendly interface simplifies the process of network management, allowing administrators to optimize resources and maintain continuous uptime.

In conclusion, Cisco Systems IC-23 stands out as a highly capable networking solution tailored for modern enterprises. With its high-speed connectivity, comprehensive security features, SDN capabilities, scalability, and intuitive management tools, the IC-23 is well-equipped to meet the demands of today’s digital environments. As organizations continue to navigate the complexities of the digital age, the IC-23 prepares them to thrive in an increasingly interconnected world.
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