Radio Shack FX2 Installation Guide download pdf (Page 32)

(Revised 8/4/2009)

Tagged VLAN

Tagged VLAN is in accordance with IEEE 802.1Q.

When configuring each group:

o choose VID ( 2-511 ranged on input) (except group1 is always VID=1)

o choose member ports (any, all or none)

o by port, choose if this is the primary VID for the port.

o by port, for this group, choose if outgoing packets are untagged

( a port could tx untagged if one VID and tagged if another VID)

When configuring untagged incoming packet handling:

- Drop all untagged incoming packets, or which ports to do this on.

( If untagged incoming packets are accepted by a port, the port's PVID will be used as the tag.

If also the port transmits tagged for the group, that PVID will be used outgoing.)

Note that:

• ‘bfilter’ must be disabled (all ports receiving broadcast) before enabling vlan.

• Ports are deleted from group1 as each port is added to another group.

• Ports are added to group1 if a deletion leaves a port with no group.

(Every port always has at least one group.)

• These automatic adds/deletes to/from group1 are messaged to the console.

• If it is desired to have a port on group1 and also on other group(s) configure group1 last to achieve that.

If group1 is configured last and ports are left out of all groups, they'll be added to group1 and you'll see

a message.

Warnings:

Network administrators must ensure ports with non-802.1Q-compliant devices attached are configured to

transmit untagged frames. Many network interface cards for PCs and printers are not 802.1Q-compliant. If

they receive a tagged frame, they will not understand the VLAN tag and will drop the frame. Also, the

maximum legal Ethernet frame size for tagged frames was increased in 802.1Q (and its companion, 802.3ac)

from 1,518 to 1,522 bytes. This could cause network interface cards and older switches to drop tagged

frames as "oversized."

Up to 8 VLAN groups can be configured, and each group can have from zero to all ports as members.

Tagged VLAN Menu:

Command

Description

Comment

info

Displays the current VLAN settings.

disable (or enable)

Enable Disable VLAN

Choice is opposite of current state

untagged

Untagged pkt handling

How to handle untagged incoming packets, by port

port

Switch to Port Based VLAN

group1

configure tagged VLAN Group 1

Select VID and member ports

group2

configure tagged VLAN Group 2

Select VID and member ports

group3

configure tagged VLAN Group 3

Select VID and member ports

group4

configure tagged VLAN Group 4

Select VID and member ports

Group5

configure tagged VLAN Group 5

Select VID and member ports

Group6

configure tagged VLAN Group 6

Select VID and member ports

Group7

configure tagged VLAN Group 7

Select VID and member ports

Group8

configure tagged VLAN Group 8

Select VID and member ports

cleargroups

clear all 8 tagged VLAN Groups

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Radio Shack FX2 Installation Guide Page 32

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