Understanding Online Insertion And Removal - Cisco Catalyst 4500 Series Software Configuration Manual

This example show s how to display the auto-MDIX configuration setting and its operational state on Fast Ethernet interface
6/1:
Switch# show interfaces fastethernet 6/1
FastEthernet6/1 is up, line protocol is up (connected)
Hardware is Fast Ethernet Port, address is 0001.64fe.e5d0 (bia 0001.64fe.e5d0)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, link type is auto, media type is 10/100BaseTX
input flow-control is unsupported output flow-control is unsupported
Auto-MDIX on (operational: on)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:16, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
511 packets input, 74464 bytes, 0 no buffer
Received 511 broadcasts (511 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
3552 packets output, 269088 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
1 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Switch#

Understanding Online Insertion and Removal

The online insertion and removal (OIR) feature supported on the Catalyst 4500 series switch allows you to remove and replace
modules while the system is online. You can shut down the module before removal and restart it after insertion without causing
other software or interfaces to shut down.
You do not need to enter a command to notify the software that you are going to remove or install a module. The system notifies
the supervisor engine that a module has been removed or installed and scans the system for a configuration change. The OIR
process may take up to 70 seconds before the newly installed module is initialized. Each interface type is verified against the
system configuration, after which the system runs diagnostics on the new interface. There is no disruption to normal operation
during module insertion or removal.
If you remove a module and then replace it, or insert a different module of the same type into the same slot, no change to the
system configuration is needed. An interface of a type that has been configured previously is brought online immediately. If
you remove a module and insert a module of a different type, the interface(s) on that module is administratively up with the
default configuration for that module.
Online Insertion and Removal on a WS-4500X-32
You must initiate an uplink module removal procedure on a WS-4500X-32 (the Catalyst 4500-X Series Switch) either through
a CLI (below) or through the OIR button on the front panel of the uplink.
Chapter 9 Configuring Interfaces
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS
Understanding Online Insertion and Removal