108 Chapter 2 Network configuration
208700-B
Figure 19 Port-based VLAN assignment
As shown in
Figure 20
, the untagged packet is marked (tagged) as it leaves the
switch through port 5, which is configured as a tagged member of VLAN 2. The
untagged packet remains unchanged as it leaves the switch through port 7, which
is configured as an untagged member of VLAN 2.
Figure 20 802.1Q tagging (after port-based VLAN assignment)
In
Figure 21
, untagged incoming packets are assigned to VLAN 3 (policy
VLAN = 3, PVID = 2). Port 5 is configured as a tagged member of VLAN 3,
and port 7 is configured as an untagged member of VLAN 3.
Port 6
DA
SA
Data
CRC
BS45011A
Port 7
Port 8
Port 1
Po
rt
4
Po
rt
5
Port 2
Port 3
802.1Q Switch
PVID = 2
Untagged packet
Untagged member
of VLAN 2
Tagged member
of VLAN 2
Before
BS45012A
Port 6
Port 7
Port 8
Port 1
Po
rt
4
Po
rt
5
Port 2
Port 3
802.1Q Switch
Key
Priority
CFI
VID
- User_priority
- Canonical format indicator
- VLAN identifier
PVID = 2
Tagged member
of VLAN 2
Untagged member
of VLAN 2
After
DA
SA
Data
CRC
(*Recalculated)
Outgoing
untagged packet
(unchanged)
DA
SA
Data
CRC*
Tag
VID = 2
Priority
16 bits
3 bits
1 bits
12 bits
8100
CFI
Содержание 2000
Страница 16: ...16 Contents 208700 B ...
Страница 22: ...22 Figures 208700 B ...
Страница 26: ...26 Tables 208700 B ...
Страница 32: ...32 Preface 208700 B ...
Страница 85: ...Chapter 1 The Business Policy Switch 2000 85 Using the Business Policy Switch 2000 Version 1 2 ...
Страница 86: ...86 Chapter 1 The Business Policy Switch 2000 208700 B ...
Страница 272: ...272 Chapter 3 Using the console interface 208700 B ...
Страница 292: ...292 Chapter 4 Policy enabled networks 208700 B ...
Страница 326: ...326 Chapter 5 Sample QoS configuration 208700 B ...
Страница 346: ...346 Appendix B Interoperability in a mixed stack configuration 208700 B ...
Страница 368: ...368 Appendix C Media dependent adapters 208700 B ...
Страница 386: ...386 Appendix E Connectors and pin assignments 208700 B ...