Lenovo Flex System Fabric CN4093, Application Manual

Page: 143 / 634

© Copyright Lenovo 2017 Chapter 8: VLANs
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Figure 2.
Default VLAN settings
Note:
The port numbers specified in these illustrations may not directly
correspond to the physical port configuration of your switch model.
When a VLAN is configured, ports are added as members of the VLAN, and the
ports are defined as either tagged or untagged (see Figure 3 through Figure 6 ).
The default configuration settings for CN4093s have all ports set as untagged
members of VLAN 1 with all ports configured as PVID = 1. In the default
configuration example shown in Figure 2 , all incoming packets are assigned to
VLAN 1 by the default port VLAN identifier (PVID =1).
Figure 3 through Figure 6 illustrate generic examples of VLAN tagging. In
Figure 3 , 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.
Note:
The port assignments in the following figures are general examples and are
not meant to match any specific CN4093.
Figure 3.
Port ‐ based VLAN assignment
Port 1
DA
SA
Data
CRC
Incoming
untagged
packet
BS45010A
Port 2 Port 3 Port 4 Port 5
VLAN 1
802.1Q Switch
By default:
Key
All ports are assigned PVID = 1
All external ports are untagged members of VLAN 1
All internal server ports are untagged members of VLAN 1
PVID = 1
Port 6 ...
DA
SA
Data
CRC
Outgoing
untagged packet
(unchanged)
Port 7
Port 6
DA SA Data CRC
BS45011A
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
B
efore