Appendix K Router Platform User Interface Reference

 

 

 

Router Interfaces Page

 

Table K-10

Create Router Interface Dialog Box (Continued)

 

 

 

VLAN ID

 

Applies only to subinterfaces with encapsulation type DOT1Q.

 

 

The VLAN ID associated with this subinterface. The VLAN ID specifies

 

 

where 802.1Q tagged packets are sent and received on this subinterface;

 

 

without a VLAN ID, the subinterface cannot send or receive traffic. Valid

 

 

values range from 1 to 4094.

 

 

Note

All VLAN IDs must be unique among all subinterfaces configured

 

 

 

on the same physical interface.

 

 

Tip

To configure DOT1Q encapsulation on an Ethernet interface without

 

 

 

associating the VLAN with a subinterface, enter the vlan-id dot1q

 

 

 

command using CLI commands or FlexConfigs. See Understanding

 

 

 

FlexConfig Objects, page 9-52. Configuring VLANs on the main

 

 

 

interface increases the number of VLANs that can be configured on

 

 

 

the router.

 

 

 

Native VLAN

 

Applies only when the encapsulation type is DOT1Q and you are configuring

 

 

a physical interface that is meant to serve as an 802.1Q trunk interface.

 

 

Trunking is a way to carry traffic from several VLANs over a point-to-point

 

 

link between two devices.

 

 

When selected, the Native VLAN is associated with this interface, using the

 

 

ID specified in the VLAN ID field. (If no VLAN ID is specified for the

 

 

Native VLAN, the default is 1.) The native VLAN is the VLAN to which all

 

 

untagged VLAN packets are logically assigned by default. This includes the

 

 

management traffic associated with the VLAN. If no VLAN ID is defined,

 

 

the default is 1.

 

 

For example, if the VLAN ID of this interface is 1, all incoming untagged

 

 

packets and packets with VLAN ID 1 are received on the main interface and

 

 

not on a subinterface. Packets sent from the main interface are transmitted

 

 

without an 802.1Q tag.

 

 

When deselected, the Native VLAN is not associated with this interface.

 

 

Note

The Native VLAN cannot be configured on a subinterface of the

 

 

 

trunk interface. Be sure to configure the same Native VLAN value at

 

 

 

both ends of the link; otherwise, traffic may be lost or sent to the

 

 

 

wrong VLAN.

 

 

 

 

 

 

 

User Guide for Cisco Security Manager 3.2

 

 

 

 

 

 

OL-16066-01

 

 

K-23

 

 

 

Page 23
Image 23
Cisco Systems OL-16066-01 appendix Vlan ID