Dell PowerEdge VRTX - Manual (Page 314)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGSwitching_VLAN.fm
D E L L C O N F ID E N T IA L – P R E L IM I N A RY 4 / 1 8 /1 3 - F O R P R O O F O N LY
• Trunk Ports
Ports set to Trunk mode may belong to multiple VLANs. The default
VLAN membership of a trunk port is all VLANs (1-4094). A PVID must be
set on the port (it can be a non-existing VLAN). Trunk ports accept tagged
and untagged frames. Untagged frames will be classified to the VLAN
whose VLAN ID (VID) is configured as the port’s PVID.
Frames, sent from the port in the VLAN, whose VID is the current PVID,
are sent untagged. Frames sent in all other VLANs active on the port are
sent tagged.
Ingress filtering is always enabled on Trunk-mode ports. Incoming frames
will undergo ingress filtering, and if correctly tagged, (tagged with a VID of
one of the VLANs to which the port currently belongs) are admitted.
The default PVID is 1 (the default VLAN). If another VID is configured as
the port’s PVID, and the corresponding VLAN is deleted from the port or
from the system, the port’s PVID reverts to 1, meaning that the port is
made a member of the default VLAN.
Setting a trunk-port’s PVID to 4095 limits traffic to tagged frames.
Incoming untagged frames are silently discarded, and no frames are sent
untagged.
Trunk-mode ports are intended for switch-to-switch links, where traffic is
usually tagged.
• General Ports
Ports set to General mode may be members of multiple VLANs. Each of
these VLANs may be configured to be tagged or untagged. This setting
applies to transmitted frames. Incoming untagged frames are classified
into the VLAN whose VID is the currently configured PVID.
Ingress filtering may be disabled on General ports. Ingress filtering is
enabled by default.
• Promiscuous Ports
A promiscuous port can communicate with all ports of the same Private
VLAN (PVLAN), including the isolated ports of the same PVLAN.