PVID = 2
138
G8264CS Application Guide for ENOS 8.4
As shown in Figure
4, 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 4. 802.1Q tagging (after port‐based VLAN assignment)
Port 1
802.1Q Switch
Port 6
Untagged memeber
of VLAN 2
Outgoing
untagged packet
(unchanged)
In Figure
5, tagged incoming packets are assigned directly to VLAN 2 because of
the tag assignment in the packet. Port 5 is configured as a tagged member of VLAN
2, and port 7 is configured as an untagged member of VLAN 2.
Figure 5. 802.1Q tag assignment
As shown in Figure
6, the tagged packet remains unchanged as it leaves the switch
through port 5, which is configured as a tagged member of VLAN 2. However, the
tagged packet is stripped (untagged) as it leaves the switch through port 7, which
is configured as an untagged member of VLAN 2.
Port 2
Port 3
(*Recalculated)
Port 7
Port 8
CRC
Data
SA
DA
Tagged member
of VLAN 2
CRC*
Data
Tag
SA
8100
Priority
16 bits
3 bits
After
Key
Priority
- User_priority
CFI
- Canonical format indicator
VID
- VLAN identifier
DA
CFI
VID = 2
1 bits
12 bits
BS45012A