Chapter 3 Functional Overview; Chassis Slot And Logical Interface Numbering - Cisco CISCO7201 Installation And Configuration Manual

Functional Overview

Chassis Slot and Logical Interface Numbering

In the Cisco 7201 router, the port-adapter-slot-number is the chassis slot in which a port adapter is
installed, whereas the logical-interface-number is the physical location of the interface port on a port
adapter.
The port adapter slot in the Cisco 7201 router is numbered slot 1. Port adapter slot 0 is always reserved
for logical port 10/100/1000.
The Media Access Control (MAC) or hardware address is a standardized data link layer address that is
required for certain network interface types. These addresses are not used by other devices in the
network; they are specific and unique to each port. The Cisco 7201 router uses a specific method to
assign and control the MAC addresses of its port adapters. For a description of the MAC address, see the
"MAC Address" section on page
You can identify port adapter slots by using software commands. To display information about all port
adapter slots, use the show interfaces command. To display information about a specific port adapter
slot, use the show interfaces command with the port adapter type and slot number in the format
show interfaces port-adapter-type slot-number/port-number. If you abbreviate the command (sh int)
and do not specify port adapter type and slot number (or arguments), the system interprets the command
as show interfaces and displays the status of all port adapters and ports.
The following example shows how the show interfaces command, used without arguments, displays
status information (including the physical port adapter number) for the port adapter in a Cisco 7201
router.
In the following example, most of the status information for each interface is omitted.
Router# show interfaces
GigabitEthernet0/0 is up, line protocol is up
Hardware is MV64460 Internal MAC, address is 0019.56c5.2adb (bia
0019.56c5.2adb)
Internet address is 209.165.200.225
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:07:03, output 00:00:07, output hang never
Last clearing of "show interface" counters 00:00:04
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 180240000 bits/sec, 430965 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
You can also use arguments such as the interface type (Ethernet, Token Ring, ATM, and so forth) and
the port address (slot-number/port-number) to display information about a specific interface only.
Cisco 7201 Installation and Configuration Guide
3-2
reliability 255/255, txload 1/255, rxload 45/255
2222975 packets input, 133378500 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
3-3.
Chapter 3 Starting and Configuring the Router
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