Cisco MWR 2941 - Page 676

Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
switchport mode
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Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
OL-23890-01
If you enter trunk mode, the interface goes into permanent trunking mode and negotiates to convert the
link into a trunk link even if the neighboring interface does not agree to the change.
If you enter dynamic auto mode, the interface converts the link to a trunk link if the neighboring
interface is set to trunk or desirable mode.
If you enter dynamic desirable mode, the interface becomes a trunk interface if the neighboring
interface is set to trunk, desirable, or auto mode.
If you configure a port as a promiscuous or host-PVLAN port and one of the following applies, the port
becomes inactive:
• The port does not have a valid PVLAN association or mapping configured.
• The port is a SPAN destination.
If you delete a private-port PVLAN association or mapping, or if you configure a private port as a SPAN
destination, the deleted private-port PVLAN association or mapping or the private port that is configured
as a SPAN destination becomes inactive.
If you enter dot1q-tunnel mode, PortFast Bridge Protocol Data Unit (BPDU) filtering is enabled and
Cisco Discovery Protocol (CDP) is disabled on protocol-tunneled interfaces.
Examples The following example shows how to set the interface to access desirable mode:
Router(config-if)# switchport mode access
The following example shows how to set the interface to trunk mode:
Router(config-if)# switchport mode trunk
The following example shows how to set the interface to dynamic desirable mode:
Router(config-if)# switchport mode dynamic desirable
Related Commands Command Description
show dot1q-tunnel Displays a list of 802.1Q tunnel-enabled ports.
show interfaces switchport Displays administrative and operational status of a switching
(nonrouting) port.
show interfaces trunk Displays trunk information.
switchport Modifies the switching characteristics of the Layer 2-switched
interface.
switchport private-vlan
host-association
Defines a PVLAN association for an isolated or community port.
switchport private-vlan
mapping
Defines the PVLAN mapping for a promiscuous port.
switchport trunk Sets trunk characteristics when the interface is in trunking mode.