ZyXEL Communications ZyXEL Dimension ES-4124 User Manual page 417

where
<vlan-id>
<name-str>
<port-list>
• Enter
fixed
• Enter
normal
<vlan-id>
• Enter
forbidden
<vlan-id>
• Enter
no fixed
• Enter
untagged
• Enter
no untagged
49.3.4.1 Modify a Static VLAN Table Example
The following example configures ports 1 to 5 as fixed and untagged ports in VLAN 2000.
sysname (config)# vlan 2000
sysname (config-vlan)# fixed 1-5
sysname (config-vlan)# untagged 1-5
49.3.4.2 Forwarding Process Example
49.3.4.2.1 Tagged Frames
1 First the Switch checks the VLAN ID (VID) of tagged frames or assigns temporary
VIDs to untagged frames.
2 The Switch then checks the VID in a frame's tag against the SVLAN table.
3 The Switch notes what the SVLAN table says (that is, the SVLAN tells the Switch
whether or not to forward a frame and if the forwarded frames should have tags).
4 Then the Switch applies the port filter to finish the forwarding decision. This means that
frames may be dropped even if the SVLAN says to forward them. Frames might also be
dropped if they are sent to a CPE (customer premises equipment) DSL device that does
not accept tagged frames.
49.3.4.2.2 Untagged Frames
1 An untagged frame comes in from the LAN.
2 The Switch checks the PVID table and assigns a temporary VID of 1.
3 The Switch ignores the port from which the frame came, because the Switch does not
send a frame to the port from which it came. The Switch also does not forward frames to
"forbidden" ports.
4 If after looking at the SVLAN, the Switch does not have any ports to which it will send
the frame, it won't check the port filter.
ES-4124 User's Guide
= The VLAN ID [1 – 4094].
= A name to identify the SVLAN entry.
= This is the Switch port list.
to register the
<port-list>
to confirm registration of the
.
to block a
<port-list>
.
or
no forbidden
to send outgoing frames without a tag.
to tag outgoing frames.
Chapter 49 IEEE 802.1Q Tagged VLAN Commands
to the static VLAN table with
to the static VLAN table with
<port-list>
from joining the static VLAN table with
to change
<port-list>
.
<vlan-id>
to normal status.
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