Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual page 135

Chapter 8 Configuring LAN Ports for Layer 2 Switching
Complete the steps in the
Note
tasks in this section.
Configuring the Layer 2 Trunk to Use DTP
Complete the steps in the
Note
performing the tasks in this section.
To configure the Layer 2 trunk to use DTP, perform this task:
Command
Router(config-if)# switchport mode dynamic {auto |
desirable}
Router(config-if)# no switchport mode
When configuring the Layer 2 trunk to use DTP, note the following information:
•
•
Note Complete the steps in the
tasks in this section.
Configuring the Layer 2 Trunk Not to Use DTP
Complete the steps in the
Note
performing the tasks in this section.
To configure the Layer 2 trunk not to use DTP, perform this task:
Command
Step 1
Router(config-if)# switchport mode trunk
Router(config-if)# no switchport mode
Step 2
Router(config-if)# switchport nonegotiate
Router(config-if)# no switchport nonegotiate
When configuring the Layer 2 trunk not to use DTP, note the following information:
•
OL-11439-03
"Completing Trunk Configuration" section on page 8-12
"Configuring a LAN Port for Layer 2 Switching" section on page 8-7
Required only if the interface is a Layer 2 access port or to specify the trunking mode.
See Table 8-2 on page 8-4
"Completing Trunk Configuration" section on page 8-12
"Configuring a LAN Port for Layer 2 Switching" section on page 8-7
Before entering the switchport mode trunk command, you must configure the encapsulation (see
the "Configuring the Layer 2 Switching Port as an ISL or 802.1Q Trunk" section on page
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
Purpose
(Optional) Configures the trunk to use DTP.
Reverts to the default trunk trunking mode (switchport mode
dynamic desirable).
for information about trunking modes.
Purpose
(Optional) Configures the port to trunk unconditionally.
Reverts to the default trunk trunking mode (switchport
mode dynamic desirable).
(Optional) Configures the trunk not to use DTP.
Enables DTP on the port.
Configuring LAN Interfaces for Layer 2 Switching
after performing the
after performing the
before
before
8-8).
8-9