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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
78-17058-01
Chapter9 Configuring Interface Characteristics
Monitoring and Maintaining the Interfaces
Note If Layer 2 Gigabit Ethernet interfaces are configured to accept f rames gr eater th an the 10/ 100 interf aces,
jumbo frames received on a Layer 2 Gigabit Ethernet interface and sent on a Layer 2 10/100 interface
are dropped.
Beginning in privileged EXEC mode, follow these steps to change the MTU size for all 10/100 or Gigabit
Ethernet interfaces:
If you enter a value that is outside the allowed range for the specific type of interface, the value is not
accepted.
After the switch reloads, you can verify your settings by entering the show system mtu pri vilege d EXEC
command.
This example shows how to set the maximum packet size for a Gigabit Ethernet port to 1800 bytes:
Switch(config)# system jumbo mtu 1800
Switch(config)# exit
Switch# reload
This example shows the response when you try to set Gigabit Etherne t i nter faces t o an out- of-ra ng e
number:
Switch(config)# system mtu jumbo 25000
^
% Invalid input detected at '^' marker.
Monitoring and Maintaining the Interfaces
These sections contain interface monitoring and maintenance information:
•Monitoring Interface Status, page 9-23
•Clearing and Resetting Interfaces and Counters, page 9-24
•Shutting Down and Restarting the Interface, page 9-24
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 system mtu bytes (Optional) Change the MTU size for all interfaces on
the switch that are operating at 10 or 100 Mbps. T he
range is 1500 to 1546 bytes; the default is 1500 bytes.
Step3 system mtu jumbo bytes (Optional) Change the MTU size for all Gigabit
Ethernet interfaces on the switch. The range is 1500 to
9000 bytes; the default is 1500 bytes.
Step4 end Return to privileged EXEC mode.
Step5 copy running-config startup-config Save your entries in the configuration file.
Step6 reload Reload the operating system.