Configuring the VLAN Egress List

Configuring the VLAN Egress List

Purpose

To assign or remove ports on the egress list of a particular VLAN. This determines which ports on the switch will be eligible to transmit frames for a particular VLAN. For example, ports 1, 5, 7, 8 could be allowed to transmit frames belonging to VLAN 20 and ports 7,8, 9, 10 could be allowed to transmit frames tagged with VLAN 30 (a port can belong to multiple VLAN Egress lists). Note that the Port Egress list for ports 7 and 8 would contain both VLAN 20 and 30.

The port egress type for all ports can be set to tagged, forbidden, or untagged. In general, VLANs have no egress (except for VLAN 1) until they are configured by static administration, or through dynamic mechanisms such as GVRP.

Setting a port to forbidden prevents it from participating in the specified VLAN and ensures that any dynamic requests (either through GVRP or dynamic egress) for the port to join the VLAN will be ignored. Setting a port to untagged allows it to transmit frames without a tag header. This setting is usually used to configure a port connected to an end user device. Frames sent between VLAN aware switches are typically tagged.

The default VLAN defaults its egress to untagged for all ports.

Commands

For information about...

Refer to page...

 

 

show port egress

10-13

 

 

set vlan forbidden

10-14

 

 

set vlan egress

10-15

 

 

clear vlan egress

10-15

 

 

show vlan dynamicegress

10-16

 

 

set vlan dynamicegress

10-17

 

 

show port egress

Use this command to display the VLAN membership for one or more ports.

Syntax

show port egress [port-string]

Parameters

port‐string

(Optional) Displays VLAN membership for specific port(s). For a detailed

 

description of possible port‐string values, refer to Port String Syntax Used

 

in the CLI” on page 7‐1.

 

 

Defaults

If port‐string is not specified, VLAN membership will be displayed for all ports.

SecureStack C3 Configuration Guide 10-13

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Enterasys Networks 9034313-07 manual Configuring the Vlan Egress List, Show port egress