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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 7 Configuring Gigabit Ethernet Interfaces
Modifying MTU Size on the Interface
DETAILED STEPS
Verifying the MTU Size
To verify the MTU size, use the show interface gigabitethernet and show interface mtu commands.
Router# show interface gigabitethernet 0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 4055.398d.bd05 (bia 4055.398d.bd05)
MTU 6000 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full Duplex, 1000Mbps, link type is auto, media type is RJ45
output flow-control is unsupported, input flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters 21:01:41
Input queue: 0/200/0/0 (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
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
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 packets output, 0 bytes, 0 underruns
Router# show interface mtu
Port Name MTU
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
interface gigabitethernet
slot/port
Example:
Router(config)# interface gigabitethernet 0/1
Selects a Gigabit Ethernet interface and enters
interface configuration mode.
• slot/port—Specifies the slot and port number.
Step 4
mtu
bytes
Example:
Router(config-if)# mtu 6000
Configures the MTU size for Gigabit Ethernet
interface.
• bytes—The range is from 1500 to 9216. The
default is 9216.
Note To set the MTU size to its default value, use
the no mtu or default mtu command.