Cisco Systems IC-23 Enabling Source Address Control, Enabling Snmp Illegal Address Trap, IC-46

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Configuring LAN Interfaces

Configuring a Hub Interface

To enable the link test function on a hub port connected to an Ethernet interface, use the following command in hub configuration mode:

Command

link-test

Purpose

Enables the link test function.

Enabling Source Address Control

On an Ethernet hub port only, you can configure a security measure such that the port accepts packets only from a specific MAC address. For example, suppose your workstation is connected to port 3 on a hub, and source address control is enabled on port 3. Your workstation has access to the network because the hub accepts any packet from port 3 with your workstation’s MAC address. Any packets arriving with a different MAC address cause the port to be disabled. The port is enabled again after 1 minute and the MAC address of incoming packets is checked again.

To enable source address control on a per-port basis, use the following command in hub configuration mode:

Command

Purpose

 

 

source-address [mac-address]

Enables source address control.

 

 

If you omit the optional MAC address, the hub remembers the first MAC address it receives on the selected port, and allows only packets from the learned MAC address.

See the examples of establishing source address control in the “Hub Configuration Examples” section.

Enabling SNMP Illegal Address Trap

To enable the router to issue an SNMP trap when an illegal MAC address is detected on an Ethernet hub port, use the following commands in hub configuration mode:

 

Command

Purpose

Step 1

 

 

hub ethernet number port [end-port]

Specifies the hub number and the hub port (or range of hub ports) and

 

 

enters hub configuration mode.

Step 2

 

 

snmp trap illegal-address

Enables the router to issue an SNMP trap when an illegal MAC address

 

 

is detected on the hub port.

 

 

 

You may need to set up a host receiver for this trap type (snmp-server host) for a Network Management System (NMS) to receive this trap type. The default is no trap. For an example of configuring a SNMP trap for an Ethernet hub port, see the “Hub Configuration Examples” section.

Cisco IOS Interface Configuration Guide

IC-46

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Contents Configuring an Ethernet or Fast Ethernet Interface IC-23Ethernet and Fast Ethernet Interface Configuration Task List IC-24Specifying 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 Configuring PA-12E/2FE Port Adapter IC-28Configuring the PA-12E/2FE Port Adapter IC-29IC-30 Monitoring and Maintaining the PA-12E/2FE Port Adapter IC-31IC-32 Configuring Fast EtherChannel Configuring the 100VG-AnyLAN Port AdapterIC-33 Fast EtherChannel Configuration Task List IC-34Configuring the Port-Channel Interface IC-35Configuring the Fast Ethernet Interfaces IC-36Configuring a Fiber Distributed Data Interface IC-37Using Connection Management Information IC-38Fddi Configuration Task List Specifying a FddiIC-39 Enabling Full-Duplex Mode on the Fddi Enabling Fddi Bridging EncapsulationIC-40 Setting the Token Rotation Time Setting the Transmission Valid TimerControlling the Transmission Timer Modifying the C-Min TimerModifying the TB-Min Timer Modifying the Fddi Timeout TimerSetting the Bit Control Controlling SMT Frame ProcessingSetting Fddi Frames Per Token Limit Controlling the CMT MicrocodeStarting and Stopping Fddi IC-43Configuring a Hub Interface Controlling the Fddi SMT Message Queue SizePreallocating Buffers for Bursty Fddi Traffic IC-44Enabling a Hub Port Disabling or Enabling Automatic Receiver Polarity ReversalDisabling or Enabling the Link Test Function IC-45Enabling Source Address Control Enabling Snmp Illegal Address TrapIC-46 Configuring a LAN Extender Interface Connecting a LAN Extender to a Core RouterExpanded View of the Connection to a Core Router IC-47Installing a LAN Extender at a Remote Site Discovering the MAC AddressUpgrading Software for the LAN Extender Management of the LAN Extender InterfaceConfiguring the LAN Extender IC-49LAN Extender Interface Configuration Task List Configuring and Creating a LAN Extender InterfaceIC-50 Defining Packet Filters IC-51Filtering by MAC Address and Vendor Code IC-52Controlling Priority Queueing IC-53Controlling the Sending of Commands to the LAN Extender IC-54Restarting the LAN Extender Downloading a Software Image to the LAN ExtenderIC-55 Troubleshooting the LAN Extender IC-56System OK IC-57Configuring a Token Ring Interface IC-58Token Ring Interface Configuration Task List Dedicated Token Ring Port AdapterSpecifying a Token Ring Interface Enabling Early Token ReleaseLAN Interface Configuration Examples Configuring PCbus Token Ring Interface ManagementEnabling Token Ring Concentrator Port Monitoring and Maintaining the PortEthernet Encapsulation Enablement Example Full Duplex Enablement Operation ExamplePA-12E/2FE Port Configuration Examples IC-61PA-VG100 Port Adapter Configuration Example IC-62Fast EtherChannel Configuration Examples IC-63Fddi Frames Configuration Example IC-64Hub Configuration Examples Hub Port Startup ExamplesHub Port Shutdown Examples IC-65LAN Extender Enablement Interface Example LAN Extender Interface Access List ExamplesSnmp Illegal Address Trap Enablement for Hub Port Example MAC Address Filtering ExampleEthernet Type Code Filtering Example IC-67IC-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.