GE Security GE-DS-82, User Manual

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Chapter 4: Web-Based Management
GE-DS-82 and 82-PoE Ethernet Managed Switch User Manual 77
OBJECT DESCRIPTION
Ingress Filtering 1
Ingress filtering lets frames belonging to a specific VLAN to be
forwarded if the port belongs to that VLAN.
Enable: Forward only packets with VID matching this port's configured
VID.
Disable: Disable Ingress filter function.
Ingress Filtering 2
Drop untagged frame.
Disable: Acceptable all Packet.
Enable: Only packet with match VLAN ID can be permission to go
through the port.
Apply button Press the button to save configurations.
802.1Q VLAN
•
IEEE 802.1Q Tunneling (Q-in-Q)
IEEE 802.1Q Tunneling (QinQ) is designed for service providers carrying traffic for
multiple customers across their networks. QinQ tunneling is used to maintain
customer-specific VLAN and Layer 2 protocol configurations even when different
customers use the same internal VLAN IDs. This is accomplished by inserting Service
Provider VLAN (SPVLAN) tags into the customer's frames when they enter the service
provider's network, and then stripping the tags when the frames leave the network.
A service provider's customers may have specific requirements for their internal VLAN
IDs and number of VLANs supported. VLAN ranges required by different customers in
the same service-provider network might easily overlap, and traffic passing through
the infrastructure might be mixed. Assigning a unique range of VLAN IDs to each
customer would restrict customer configurations, require intensive processing of
VLAN mapping tables, and could easily exceed the maximum VLAN limit of 4096.