Using the BayStack 450 10/100/1000 Series Switch
1-56 309978-D Rev 01
As shown in Figure 1-27, the untagged packet is marked (tagged) as it leaves the
switch through port 5, which is configured as a tagged member of VLAN 3. The
untagged packet remains unchanged as it leaves the switch through port 7, which
is configured as an untagged member of VLAN 3.
Figure 1-27. 802.1Q Tagging (After Protocol-Based VLAN Assignment)
BS45085A
Port 6 Port 7 Port 8
Port 1
Port 4
Port 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 3
Untagged member
of VLAN 3
After
DA
SA
Data
CRC
(*Recalculated)
Outgoing
untagged packet
(unchanged)
DASADataCRC* Ta g
VID = 3Priority
16 bits 3 bits 1 bit 12 bits
8100 CFI
IP Protocol VLAN = 3
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