User's Manual

12-27
Catalyst 3750 Switch Software Configuration Guide
OL-8550-09
Chapter 12 Configuring Interface Characteristics
Configuring Layer 3 Interfaces
To remove an IP address from an interface, use the no ip address interface configuration command.
This example shows how to configure a port as a routed port and to assign it an IP address:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# no switchport
Switch(config-if)# ip address 192.20.135.21 255.255.255.0
Switch(config-if)# no shutdown
Configuring SVI Autostate Exclude
Configuring SVI autostate exclude on an access or trunk port in an SVI excludes that port in the
calculation of the status of the SVI (up or down line state) even if it belongs to the same VLAN. When
the excluded port is in the up state, and all other ports in the VLAN are in the down state, the SVI state
is changed to down.
At least one port in the VLAN should be up and not excluded to keep the SVI line state up. You can use
this command to exclude the monitoring port status when determining the status of the SVI.
Beginning in privileged EXEC mode, follow these steps to exclude a port from SVI state-change
calculations:
This example shows how to configure an access or trunk port in an SVI to be excluded from the status
calculation:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# switchport autostate exclude
Switch(config-if)# exit
Step 7
show interfaces [interface-id]
show ip interface [interface-id]
show running-config interface [interface-id]
Verify the configuration.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify a Layer 2 interface (physical port or port
channel), and enter interface configuration mode.
Step 3
switchport autostate exclude Exclude the access or trunk port when defining the
status of an SVI line state (up or down)
Step 4
end Return to privileged EXEC mode.
Step 5
show running config interface interface-id
show interface interface-id switchport
(Optional) Show the running configuration.
Verify the configuration.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.