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DELL S50V User Manual

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Spanning Tree Protocol | 1051
Configuring Interfaces for Layer 2 Mode
All interfaces on all switches that will participate in Spanning Tree must be in Layer 2 mode and enabled.
Figure 52-1.  Example of Configuring Interfaces for Layer 2 Mode
To configure the interfaces for Layer 2 and then enable them: 
Verify that an interface is in Layer 2 mode and enabled using the 
show config 
command from INTERFACE 
mode.
Figure 52-2.  Verifying Layer 2 Configuration
Step
Task
Command Syntax
Command Mode
1
If the interface has been assigned an IP address, 
remove it.
no ip address
INTERFACE
2
Place the interface in Layer 2 mode.
switchport
INTERFACE
3
Enable the interface.
no shutdown
INTERFACE
R1
R2
R3
1/3
3/1
3/2
3/4
3/3
1/4
1/1
1/2
2/1
2/2
2/3
2/4
R1(conf)# int range gi 1/1 - 4
R1(conf-if-gi-1/1-4)# switchport
R1(conf-if-gi-1/1-4)# no shutdown
R1(conf-if-gi-1/1-4)#show config
!
interface GigabitEthernet 1/1
 no ip address
 switchport
 no shutdown
!
interface GigabitEthernet 1/2
 no ip address
 switchport
 no shutdown
!
interface GigabitEthernet 1/3
 no ip address
 switchport
 no shutdown
!
interface GigabitEthernet 1/4
 no ip address
 switchport
 no shutdown
FTOS(conf-if-gi-1/1)#show config
!
interface GigabitEthernet 1/1
 no ip address
 switchport
no shutdown
FTOS(conf-if-gi-1/1)#
Indicates that the interface is in Layer 2 mode