Blade ICE G8124 Manuale Utente
BLADEOS 6.5.2 Application Guide
92
Chapter 6: VLANs
BMD00220, October 2010
Figure 2
Port-based VLAN assignment
, 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.
leaves the switch through port 7, which is configured as an untagged member of VLAN 2.
Figure 3
802.1Q tagging (after port-based VLAN assignment)
, 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.
configured as an untagged member of VLAN 2.
P ort 6
DA
S A
Data
C R C
P ort 7
P ort 8
P ort 1
Po
rt
4
Po
rt
5
P ort 2
P ort 3
802.1Q S witch
P V ID = 2
Untagged packet
Untagged member
of V LAN 2
of V LAN 2
Tagged member
of V LAN 2
of V LAN 2
B
efore
Port 6
Port 7
Port 8
Port 1
Port 4
Port 5
Port 2
Port 3
802.1Q Switch
Key
Priority
CFI
VID
CFI
VID
- User_priority
- Canonical format indicator
- VLAN identifier
- Canonical format indicator
- VLAN identifier
PVID = 2
Tagged member
of VLAN 2
of VLAN 2
Untagged memeber
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