Users Guide
Network Administration: VLAN 145
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Astute\User
Guide\Dell_Astute_Network_Admin_VLAN.fm
DELL CONFIDENTIAL – PRELIMINARY 8/9/16 - FOR PROOF ONLY
QinQ Tagging
QinQ enables packets between sites of a customer network to be forwarded
over a provider network. The device is a provider bridge that supports c-
tagged service interface to which the customer network/site connects.
QinQ tagging adds a service VLAN tag to customer-tagged packets when
forwarding customer packets into the provider network. The added tag
provides a VLAN ID to each customer, which ensures private and segregated
network traffic. The VLAN ID tag is assigned to a customer port in the service
provider network. This enables administrators to expand service to VLAN
users.
The supported ethernet type is 0x8100.
Port Modes
Ports participating in Layer 2 switching may be classified as:
•
Access Ports
Ports set to Access mode belong to a single VLAN, whose VID is the
currently set PVID (default =1). These ports accept all untagged frames,
and all frames tagged with the VID, currently set as the port's PVID. All
traffic egress to access ports is sent untagged. If the VLAN, whose VID is
set as the current PVID of the port, is deleted from the system, or deleted
from the port, the port's PVID will be set to 1, meaning that the port will
be made a member of VLAN1, the default VLAN.
Ingress filtering is always enabled for ports in Access mode.
Setting an Access port’s PVID to 4095 effectively shuts it down, as no
frames will be transferred in either direction.
Access mode ports are intended to connect end-stations to the system,
especially when the end-stations are incapable of generating VLAN tags.
•
Trunk Ports
Ports set to Trunk mode can 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.