Lenovo Flex System Fabric CN4093 Application Manual page 267

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The following table compares the configurations of the two modes.
Table 25.
Comparison: Dedicated Mode vs. Shared Mode
Configuration Dedicated Mode
Area
Port "tagpvid" must be disabled.
"pvid" = vNIC group VLAN.
"tag" is user configurable.
Port can be added only to the
vNIC group VLAN.
Inserts vNIC group VLAN in the
outer tag of ingress packets.
VLAN Add the port to a vNIC group
VLAN and delete it from any
other VLAN when the vNIC
group VLAN is enabled.
Delete the port from the vNIC
group VLAN and add it back to
the default VLAN 1 when the
vNIC group is disabled/deleted or
when the vNIC feature is globally
disabled.
Do not add a port or LAG to mul‐
tiple vNIC groups that are
enabled.
Do not configure additional
VLANs on the uplink ports.
STP An uplink port can only be in one
STG.
When you add a port to a vNIC
group, STP is automatically dis‐
abled.
When you remove a port from a
vNIC group, STP is automatically
reset to factory default.
Failover An uplink up/event can trigger
the failover state change only of
one vNIC group.
Shared Mode
"tagpvid" is user configurable.
"pvid" is user configurable.
"tag" must be enabled.
Port can be added to multiple VLANs
in addition to the vNIC group VLANs
that are automatically configured.
Inserts regular VLAN in the outer tag.
VLAN tags are passed to and received
from the uplink switch similar to
vNIC ports.
To handle untagged packets, con‐
figure the pvid/native VLAN of the
uplink port to one of the vNIC group
VLANs, and disable "tagpvid".
Add the port to all vNIC group
VLANs that are sharing the port. Do
not remove it from any other VLAN.
Remove the port from a vNIC group
VLAN when the vNIC group is dis‐
abled/deleted.
When the vNIC feature is globally
disabled or the port is not added in
any vNIC group, remove the port
from all vNIC group VLANs and add
it back to default VLAN 1 if no
non‐vNIC VLAN exists on the port.
Can add a port or LAG to multiple
vNIC groups that are enabled.
Can configure additional VLANs on
the uplink ports.
An uplink port can be in multiple
STGs.
When you add a port to a vNIC
group, STP is automatically disabled.
When you remove a port from a vNIC
group, STP is automatically reset to
factory default.
An uplink up/event can trigger the
failover state change of multiple vNIC
groups.
Chapter 15: Virtual NICs
267