Cisco Catalyst 4500 Series Software Configuration Guide

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS
Chapter 9 Configuring Interfaces
Configuring Optional Interface Features
Adding a Description for an Interface
You can add a description about an interface to help you remember its function. The description appears in the output of the
following commands: show configuration
, show running-config, and
show interfaces.
To add a description for an interface, enter the following command:
This example shows how to add a description on Fast Ethernet interface 5/5:
Switch(config)# interface fastethernet 5/5
Switch(config-if)# description Channel-group to "Marketing"
Configuring Flow Control
Gigabit Ethernet ports use flow control to slow down the transmission of incoming packets. If a buffer on a Gigabit Ethernet
port runs out of space, the port transmits a special packet that requests remote ports to delay sending packets for a period of
time. The port can also receive this special packet from its link partner for the same purpose. This special packet is called a
pause frame.
The default settings for Gigabit Ethernet interfaces are as follows:
• Sending pause frames is off—Non-oversubscribed Gigabit Ethernet interfaces.
• Receiving pause frames is desired—Non-oversubscribed Gigabit Ethernet interfaces.
• Sending pause frames is on—Oversubscribed Gigabit Ethernet interfaces.
• Receiving pause frames is desired—Oversubscribed Gigabit Ethernet interfaces
The default settings for 10-Gigabit Ethernet interfaces are as follows:
• Sending pause frames is off.
• Receiving pause frames is on.
Note desired is not a flow control option on the 10-Gigabit Ethernet interfaces.
To configure flow control, perform this task:
Command Purpose
Switch(config-if)# description string
Adds a description for an interface.
Command Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# interface
interface-id
Enters interface configuration mode and specifies the interface to be
enabled for flowcontrol.
Step 3
Switch(config-if)# flowcontrol
{receive | send} {off | on |
desired}
Configures a Gigabit Ethernet port to send or receive pause frames.
Step 4
Switch(config-if)# end
Returns to configuration mode.
Step 5
Switch(config)# end
Returns to privileged EXEC mode.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E