ES-2048 User’s Guide

The following table describes the labels in this screen.

Table 17 VLAN: VLAN Port Setting

LABEL

DESCRIPTION

 

 

GVRP

GVRP (GARP VLAN Registration Protocol) is a registration protocol that defines a

 

way for switches to register necessary VLAN members on ports across the

 

network.

 

Select this check box to permit VLAN groups beyond the local switch.

 

 

Port Isolation

Port Isolation allows each port to communicate only with the CPU management

 

port and the Gigabit uplink ports but not communicate with each other. This option

 

is the most limiting but also the most secure.

Port

This field displays the port number.

 

 

*

Settings in this row apply to all ports.

 

Use this row only if you want to make some settings the same for all ports. Use this

 

row first to set the common settings and then make adjustments on a port-by-port

 

basis.

 

Note: Changes in this row are copied to all the ports as soon as you

 

make them.

Ingress Check

If this check box is selected for a port, the device discards incoming frames for

 

VLANs that do not include this port in its member set.

 

Clear this check box to disable ingress filtering.

 

 

PVID

Enter a number between 1and 4094 as the port VLAN ID.

 

 

GVRP

Select this check box to allow GVRP on this port.

 

 

Acceptable Frame

Specify the type of frames allowed on a port. Choices are All, Tag Only and Untag

Type

Only.

 

Select All from the drop-down list box to accept all untagged or tagged frames on

 

this port. This is the default setting.

 

Select Tag Only to accept only tagged frames on this port. All untagged frames will

 

be dropped.

 

Select Untag Only to accept only untagged frames on this port. All tagged frames

 

will be dropped.

VLAN Trunking

Enable VLAN Trunking on ports connected to other switches or routers (but not

 

ports directly connected to end users) to allow frames belonging to unknown VLAN

 

groups to pass through the switch.

Apply

Click Apply to save your changes to the switch’s run-time memory. The switch

 

loses these changes if it is turned off or loses power, so use the Save link on the

 

top navigation panel to save your changes to the non-volatile memory when you

 

are done configuring.

Cancel

Click Cancel to reset the fields.

8.6 Protocol Based VLANs

Protocol based VLANs allow you to group traffic into logical VLANs based on the protocol you specify. When an upstream frame is received on a port (configured for a protocol based VLAN), the switch checks if a tag is added already and its protocol. The untagged packets of the same protocol are then placed in the same protocol based VLAN. One advantage of using protocol based VLANs is that priority can be assigned to traffic of the same protocol.

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Chapter 8 VLAN