Cisco Systems IC-23 manual Controlling the CMT Microcode, Starting and Stopping Fddi, IC-43

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Configuring LAN Interfaces

Configuring a Fiber Distributed Data Interface

Controlling the CMT Microcode

You can control whether the CMT onboard functions are on or off. The FIP provides CMT functions in microcode. These functions are separate from those provided on the processor card and are accessed through EXEC commands.

The default is for the FIP CMT functions to be on. A typical reason to disable is when you work with new FDDI equipment and have problems bringing up the ring. If you disable the CMT microcode, the following actions occur:

•The FIP CMT microcode is disabled.

•The main system code performs the CMT function while debugging output is generated. To disable the CMT microcode, use the following command in interface configuration mode:

Command

no fddi if-cmt

Purpose

Disables the FCIT CMT functions.

Starting and Stopping FDDI

In normal operation, the FDDI interface is operational once the interface is connected and configured. You can start and stop the processes that perform the CMT function and allow the ring on one fiber to be stopped. To do so, use either of the following commands in EXEC mode:

Command

Purpose

 

 

 

cmt

connect [interface-name[phy-a phy-b]]

Starts CMT processes on FDDI ring.

 

 

 

cmt

disconnect [interface-name[phy-a phy-b]]

Stops CMT processes on FDDI ring.

 

 

 

Do not use either of the preceding commands during normal operation of FDDI; they are used during interoperability tests.

Setting FDDI Frames Per Token Limit

The FDDI interface is able to transmit multiple frames per token on a Cisco 4000, Cisco 4500, and a Cisco 4700 series routers, instead of only a single frame at a time. You can specify the maximum number of frames to be transmitted with each token capture. This significantly improves your throughput, when you have heavy or very bursty traffic.

To configure the FDDI interface to transmit a maximum number of frames per token capture, use the following commands:

 

Command

Purpose

Step 1

 

 

configure terminal

Enters global configuration mode.

Step 2

 

 

interface fddi0

Enters interface configuration mode.

Step 3

 

 

fddi ?

Shows fddi command options.

Step 4

 

 

fddi frames-per-token ?

Shows fddi frames-per-tokencommand options.

Step 5

 

 

fddi frames-per-token number

Specifies the maximum number of frames to be transmitted per

 

 

token capture.

 

 

 

 

 

 

 

Cisco IOS Interface Configuration Guide

 

 

 

 

 

 

 

 

 

 

IC-43

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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 or Fast Ethernet Interface Specifying an Ethernet Encapsulation MethodIC-25 Specifying the Media and Connector Type Specifying Full-Duplex OperationIC-26 Configuring Fast Ethernet 100BASE-T Extending the 10BASE-T CapabilityIC-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 Fast EtherChannel Configuring the 100VG-AnyLAN Port AdapterIC-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 InformationFddi Configuration Task List Specifying a FddiIC-39 Enabling Full-Duplex Mode on the Fddi Enabling Fddi Bridging EncapsulationIC-40 Setting the Transmission Valid Timer Setting the Token Rotation TimeControlling the Transmission Timer Modifying the C-Min TimerModifying the Fddi Timeout Timer Modifying the TB-Min TimerSetting the Bit Control Controlling SMT Frame ProcessingControlling the CMT Microcode Setting Fddi Frames Per Token LimitStarting and Stopping Fddi IC-43Controlling the Fddi SMT Message Queue Size Configuring a Hub InterfacePreallocating Buffers for Bursty Fddi Traffic IC-44Disabling or Enabling Automatic Receiver Polarity Reversal Enabling a Hub PortDisabling or Enabling the Link Test Function IC-45Enabling Source Address Control Enabling Snmp Illegal Address TrapIC-46 Connecting a LAN Extender to a Core Router Configuring a LAN Extender InterfaceExpanded View of the Connection to a Core Router IC-47Discovering the MAC Address Installing a LAN Extender at a Remote SiteUpgrading Software for the LAN Extender Management of the LAN Extender InterfaceIC-49 Configuring the LAN ExtenderLAN Extender Interface Configuration Task List Configuring and Creating a LAN Extender InterfaceIC-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 ExtenderRestarting the LAN Extender Downloading a Software Image to the LAN ExtenderIC-55 IC-56 Troubleshooting the LAN ExtenderIC-57 System OKIC-58 Configuring a Token Ring InterfaceDedicated Token Ring Port Adapter Token Ring Interface Configuration Task ListSpecifying a Token Ring Interface Enabling Early Token ReleaseConfiguring PCbus Token Ring Interface Management LAN Interface Configuration ExamplesEnabling Token Ring Concentrator Port Monitoring and Maintaining the PortFull Duplex Enablement Operation Example Ethernet Encapsulation Enablement ExamplePA-12E/2FE Port Configuration Examples IC-61IC-62 PA-VG100 Port Adapter Configuration ExampleIC-63 Fast EtherChannel Configuration ExamplesIC-64 Fddi Frames Configuration ExampleHub Port Startup Examples Hub Configuration ExamplesHub Port Shutdown Examples IC-65LAN Extender Interface Access List Examples LAN Extender Enablement Interface ExampleSnmp Illegal Address Trap Enablement for Hub Port Example MAC Address Filtering 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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