Cisco Catalyst 4500 Series, Software Configuration Manual

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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
About Interface Configuration
About Interface Configuration
By default, all interfaces are enabled. The 10/100-Mbps Ethernet interfaces autonegotiate connection speed and duplex. The
10/100/1000-Mbps Ethernet interfaces negotiate speed, duplex, and flow control. The 1000-Mbps Ethernet interfaces negotiate
flow control only. Autonegotiation automatically selects the fastest speed possible on that port for the given pair. If a speed is
explicitly stated for an interface, that interface defaults to half duplex unless it is explicitly set for full duplex.
Many features are enabled on a per-interface basis. When you enter the interface command, you must specify the following:
• Interface type:
–
Fast Ethernet (use the fastethernet keyword)
– Gigabit Ethernet (use the gigabitethernet keyword)
–
10-Gigabit Ethernet (use the tengigabitethernet keyword)
• Slot number—The slot in which the interface module is installed. Slots are numbered starting with 1, from top to bottom.
•
Interface number — The interface number on the module. The interface numbers always begin with 1. When you are facing
the front of the switch, the interfaces are numbered from left to right.
You can identify interfaces by physically checking the slot/interface location on the switch. You can also use the Cisco IOS
show commands to display information about a specific interface or all the interfaces.
Using the interface Command
These general instructions apply to all interface configuration processes:
Step 1 At the privileged EXEC prompt, enter the configure terminal command to enter global configuration
mode:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#
Step 2
In global configuration mode, enter the interface command. Identify the interface type and the number
of the connector on the interface card. The following example shows how to select Fast Ethernet, slot 5,
interface 1:
Switch(config)#
interface fastethernet 5/1
Switch(config-if)#
Step 3 Interface numbers are assigned at the factory at the time of installation or when modules are added to a
system. Enter the
show interfaces EXEC command to see a list of all interfaces installed on your switch.
A report is provided for each interface that your switch supports, as shown in this display:
Switch(config-if)# Ctrl-Z
Switch# show interfaces
Vlan1 is up, line protocol is down
Hardware is Ethernet SVI, address is 0004.dd46.7aff (bia 0004.dd46.7aff)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)