Types of VLANs
69
Figure 9
Two port-based VLANs spanning two Switch 9100 devices
VLAN
Accounting
spans Switch 1 and Switch 2 by way of a connection
between Switch 1, port 1 and Switch 2, port 3. VLAN
Engineering
spans
Switch 1 and Switch 2 by way of a connection between Switch 1, port 5,
and Switch 2, port 6.
Using the configuration described above, you can create multiple VLANs
that span multiple switches, in a daisy-chained fashion. Each switch must
have a dedicated port for each VLAN. Each dedicated port must be
connected to a port that is a member of its VLAN on the next switch.
Tagged VLANs
Tagging
is a process that inserts a marker (called a
tag
) into the Ethernet
frame. The tag contains the identification number of a specific VLAN,
called the
VLANid
.
The use of 802.1Q tagged packets may lead to the appearance of
packets slightly bigger than the current IEEE 802.3/Ethernet maximum of
1,518 bytes. This may affect packet error counters in other devices, and
may also lead to connectivity problems if non-802.1Q bridges or routers
are placed in the path.
91_005
Accounting
Engineering
Switch 1
Switch 2
Содержание 3C17705
Страница 1: ... http www 3com com SuperStack II Switch 9100 User Guide Part No DUA1770 5AAA01 Published January 2000 ...
Страница 10: ...GLOSSARY INDEX INDEX OF COMMANDS 3COM CORPORATION LIMITED WARRANTY EMC STATEMENTS ...
Страница 14: ...14 ABOUT THIS GUIDE ...
Страница 32: ...32 CHAPTER 2 INSTALLATION AND SETUP ...
Страница 62: ...62 CHAPTER 3 ACCESSING THE SWITCH ...
Страница 80: ...80 CHAPTER 4 VIRTUAL LANS VLANS ...
Страница 86: ...86 CHAPTER 5 FORWARDING DATABASE FDB ...
Страница 98: ...98 CHAPTER 6 SPANNING TREE PROTOCOL STP ...
Страница 110: ...110 CHAPTER 7 QUALITY OF SERVICE QOS ...
Страница 124: ...124 CHAPTER 8 STATUS MONITORING AND STATISTICS ...
Страница 130: ...130 CHAPTER 9 USING THE WEB INTERFACE ...
Страница 136: ...136 CHAPTER 10 SOFTWARE UPGRADE AND BOOT OPTIONS ...
Страница 156: ...156 APPENDIX C TROUBLESHOOTING ...
Страница 162: ......
Страница 176: ...176 INDEX ...
Страница 180: ...180 INDEX OF COMMANDS ...