Cisco Systems IC-23 manual Configuring the Fast Ethernet Interfaces, IC-36

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Configuring LAN Interfaces

Configuring Fast EtherChannel

Configuring the Fast Ethernet Interfaces

To assign the Fast Ethernet interfaces to the Fast EtherChannel, use the following commands beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

interface fastethernet

Creates or modifies an existing Fast Ethernet interface and enters interface

 

slot/port-adapter/port

configuration mode.

Step 2

 

 

no ip address

Disables the IP address before performing the next step, if the Fast Ethernet

 

 

interface already exists and has an IP address assigned.

Step 3

 

 

channel-group channel-number

Assigns the Fast Ethernet interfaces to the Fast EtherChannel. The channel

 

 

number is the same as the channel number you specified when you created the

 

 

port-channel interface.

Step 4

 

 

exit

Exits interface configuration mode. Repeat Steps 1 through 4 to add up to four

 

 

Fast Ethernet interfaces to the Fast EtherChannel.

Step 5

 

 

end

(Optional) Enables other supported interface commands to execute, and exits

 

 

when they have finished.

Step 6

 

 

show interface port-channel

Displays information about the Fast Ethernet interface so you can verify the

 

 

configuration.

 

 

 

Caution The port-channel interface is the routed interface. Do not enable Layer 3 addresses on the physical Fast Ethernet interfaces. Do not assign bridge groups on the physical Fast Ethernet interfaces because it creates loops. Also, you must disable spanning tree.

To remove a Fast Ethernet interface from a Fast EtherChannel, use the following commands beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

interface fastethernet

Specifies the Fast Ethernet interface and enters interface configuration mode.

 

slot/port-adapter/port

 

Step 2

 

 

no channel-group

Removes the Fast Ethernet interface from the channel group.

Step 3

 

 

end

(Optional) Enables other supported interface commands to execute, and exits

 

 

when they have finished.

 

 

 

The Cisco IOS software automatically removes a Fast Ethernet interface from the Fast EtherChannel if the interface goes down, and the software automatically adds the Fast Ethernet interface to the Fast EtherChannel when the interface is back up.

Currently, Fast EtherChannel relies on keepalives to detect whether the line protocol is up or down. Keepalives are enabled by default on the Fast Ethernet interfaces. If the line protocol on the interface goes down because it did not receive a keepalive signal, the Fast EtherChannel detects that the line protocol is down and removes the interface from the Fast EtherChannel. However, if the line protocol remains up because keepalives are disabled on the Fast Ethernet interface, the Fast EtherChannel cannot detect this link failure (other than a cable disconnect) and does not remove the interface from the Fast

Cisco IOS Interface Configuration Guide

IC-36

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Contents Configuring an Ethernet or Fast Ethernet Interface IC-23Ethernet and Fast Ethernet Interface Configuration Task List IC-24IC-25 Specifying an Ethernet or Fast Ethernet InterfaceSpecifying an Ethernet Encapsulation Method IC-26 Specifying the Media and Connector TypeSpecifying Full-Duplex Operation IC-27 Configuring Fast Ethernet 100BASE-TExtending the 10BASE-T Capability 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 IC-33 Configuring Fast EtherChannelConfiguring the 100VG-AnyLAN Port Adapter 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-38IC-39 Fddi Configuration Task ListSpecifying a Fddi IC-40 Enabling Full-Duplex Mode on the FddiEnabling Fddi Bridging Encapsulation Controlling the Transmission Timer Setting the Token Rotation TimeSetting the Transmission Valid Timer Modifying the C-Min TimerSetting the Bit Control Modifying the TB-Min TimerModifying the Fddi Timeout Timer Controlling SMT Frame ProcessingStarting and Stopping Fddi Setting Fddi Frames Per Token LimitControlling the CMT Microcode IC-43Preallocating Buffers for Bursty Fddi Traffic Configuring a Hub InterfaceControlling the Fddi SMT Message Queue Size IC-44Disabling or Enabling the Link Test Function Enabling a Hub PortDisabling or Enabling Automatic Receiver Polarity Reversal IC-45IC-46 Enabling Source Address ControlEnabling Snmp Illegal Address Trap Expanded View of the Connection to a Core Router Configuring a LAN Extender InterfaceConnecting a LAN Extender to a Core Router IC-47Upgrading Software for the LAN Extender Installing a LAN Extender at a Remote SiteDiscovering the MAC Address Management of the LAN Extender InterfaceConfiguring the LAN Extender IC-49IC-50 LAN Extender Interface Configuration Task ListConfiguring and Creating a LAN Extender Interface 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-54IC-55 Restarting the LAN ExtenderDownloading a Software Image to the LAN Extender Troubleshooting the LAN Extender IC-56System OK IC-57Configuring a Token Ring Interface IC-58Specifying a Token Ring Interface Token Ring Interface Configuration Task ListDedicated Token Ring Port Adapter Enabling Early Token ReleaseEnabling Token Ring Concentrator Port LAN Interface Configuration ExamplesConfiguring PCbus Token Ring Interface Management Monitoring and Maintaining the PortPA-12E/2FE Port Configuration Examples Ethernet Encapsulation Enablement ExampleFull Duplex Enablement Operation Example IC-61PA-VG100 Port Adapter Configuration Example IC-62Fast EtherChannel Configuration Examples IC-63Fddi Frames Configuration Example IC-64Hub Port Shutdown Examples Hub Configuration ExamplesHub Port Startup Examples IC-65Snmp Illegal Address Trap Enablement for Hub Port Example LAN Extender Enablement Interface ExampleLAN Extender Interface Access List Examples MAC Address Filtering ExampleEthernet Type Code Filtering Example IC-67IC-68

IC-23 specifications

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