88
C
HAPTER
8: S
ETTING
U
P
V
IRTUAL
LAN
S
Figure 19
Two VLANs connected via a router
Creating New VLANs
If you want to move a port from the Default VLAN to another VLAN, you
must first define information about the new VLAN on your Switch.
VLANs: Tagged and
Untagged
Membership
Your Switch supports 802.1Q VLAN tagging, a system that allows traffic
for multiple VLANs to be carried on a single physical (backbone) link.
When setting up VLANs you need to understand when to use untagged
and tagged membership of VLANs. Quite simply, if a port is in a single
VLAN it can be an untagged member, but if the port needs to be a
member of multiple VLANs, tagged membership must be defined.
Typically endstations (for example, clients) will be untagged members of
one VLAN, while inter-Switch connections will be tagged members of all
VLANs.
The IEEE Std 802.1Q-1998 defines how VLANs operate within an open
packet-switched network. An 802.1Q compliant packet carries additional
information that allows a Switch to determine to which VLAN the port
belongs. If a frame is carrying the additional information, it is known as
tagged
.
To carry multiple VLANs across a single physical (backbone) link, each
packet must be tagged with a VLAN identifier so that the Switches can
Содержание 3C17203 - SuperStack 3 Switch 4400
Страница 8: ...GLOSSARY INDEX ...
Страница 14: ...14 ...
Страница 26: ...26 CHAPTER 1 SWITCH FEATURES OVERVIEW ...
Страница 44: ...44 CHAPTER 3 USING MULTICAST FILTERING ...
Страница 55: ...How STP Works 55 Figure 13 STP configurations ...
Страница 58: ...58 CHAPTER 4 USING RESILIENCE FEATURES ...
Страница 84: ...84 CHAPTER 7 STATUS MONITORING AND STATISTICS ...
Страница 92: ...92 CHAPTER 8 SETTING UP VIRTUAL LANS ...
Страница 98: ...98 CHAPTER 9 USING WEBCACHE SUPPORT ...
Страница 120: ...120 CHAPTER 12 POWER MANAGEMENT AND CONTROL ...
Страница 122: ...122 ...
Страница 126: ...126 APPENDIX A CONFIGURATION RULES ...
Страница 134: ...134 APPENDIX B NETWORK CONFIGURATION EXAMPLES ...
Страница 150: ...150 GLOSSARY ...