PLANET Web
Switch Family
Web / SNMP Intelligent Products
WGSW-1602
16-Port Fast Ethernet Switch with 2 GbE slots
Appendix C: VLAN
Description and Example
Packets received by the switch will be
treated in the following way with regard to the Switch¡¦s VLAN settings:
- When an untagged packet enters a port, it will be
automatically tagged with the port¡¦s default VLAN ID tag number. Each port has a default VLAN ID setting which is
user configurable (the default setting is 1). The default VLAN ID setting for each port
can be changed in that port¡¦s
respective Port Configuration page.
- When a tagged packet enters a port, the tag for that packet
will be unaffected by the default VLAN ID Setting.
- The packet will now proceed to the VLAN specified by it¡¦s VLAN ID tag number.
- If the port in which the packet entered does not have
membership with the VLAN specified by the packets VLAN ID tag, the packet will be dropped.
Port VLAN membership settings are changed in the VLAN Membership page.
- If the port has membership to the VLAN specified by the
packet¡¦s VLAN ID, the packet
will be able to be sent to other ports with the same VLAN ID membership.
- Packets leaving the switch will be either tagged or untagged
depending on the setting specified for that port¡¦s membership properties.
- A ¡¥U¡¦ for a given port
and VLAN will mean that packets leaving the switch from that port and VLAN will be
Untagged. Inversely, a ¡¥T¡¦ for a given port and VLAN will mean that
packets leaving the switch from that port and VLAN will be tagged with the respective VLAN
ID in which it participated in.
Example:

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The specific ports above have the following Default
VLAN ID settings (The Default VLAN ID settings for each port are configured in their
respective Port Configuration page.):
Port 01: 2 Port 05: 5 Port 09: 10 Port 13: 10
Port 02: 1 Port 06: 1 Port 10: 10 Port 14: 15
Port 03: 1 Port 07: 1 Port 11: 10 Port 15: 1
Port 04: 1 Port 08: 1 Port 12: 10 Port 16: 1
The VLANs have the following IDs (The VLAN
ID settings can be configured in the VLAN Administration page.):
default: 1
internal: 5
web: 10
collocat: 15
- If an untagged packet enters Port 4, the switch will tag it
with a VLAN tag value of 1. Since Port 4 does not have membership with VLAN ID 1 (named ¡§default¡¨), the packet will be dropped.
- If a tagged packet with a VLAN tag value 5 enters Port 4,
the packet will have access to Ports 5 and 1. If the packet leaves Port 5 and/or 1, it
will be stripped of it¡¦s tag
becoming an untagged packet as it leaves the switch.
- If an untagged packet enters Port 1, the switch will tag it
with a VLAN tag value of 2. It will then be dropped since Port 1 has no membership with
VLAN ID 2.
- If a tagged packet with a VLAN tag value 10 enters Port 2,
it will have access to Ports: 1, 9, 10, 11, and 12. If the packets leave Ports 1, 9, or
10, they will be tagged with a VLAN ID value of 10. If the packet leaves Ports 11 or 12,
it will leave as an untagged packet.
- If a tagged packet with a VLAN tag value 1 enters Port 9, it
will be dropped since Port 9 does not have membership with VLAN ID 1.
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Corp.
