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Introduction to the BayStack 410-24T Switch
309985-B Rev 00
1-39
In Figure 1-17, untagged incoming packets are assigned directly to VLAN 2
(PVID = 2). Port 5 is configured as a tagged member of VLAN 2, and port 7 is
configured as an untagged member of VLAN 2.
Figure 1-17. Port-Based VLAN Assignment
As shown in Figure 1-18, 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 1-18. 802.1Q Tagging (After Port-Based VLAN Assignment)
Port 6
DASADataCRC
BS41016A
Port 7 Port 8
Port 1
Port 4
Port 5
Port 2 Port 3
802.1Q Switch
PVID = 2
Untagged packet
Untagged member
of VLAN 2
Tagged member
of VLAN 2
Before
BS41017A
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 2
Untagged member
of VLAN 2
After
DA
SA
Data
CRC
(*Recalculated)
Outgoing
untagged packet
(unchanged)
DASADataCRC* Tag
VID = 2Priority
16 bits 3 bits 1 bits 12 bits
8100 CFI