171
including processing Queue-in-Queue frames with embedded tags, enabling ingress filtering,
setting the accepted frame types, and configuring the default VLAN identifier (PVID).
PATH
Configuration \ VLANs \ Ports
Figure 68: VLAN Port Configuration
PARAMETERS
These parameters are displayed:
◆
Ethertype for Custom S-ports
–
When Port Type is set to S-customport, the EtherType
(also called the Tag Protocol Identifier or TPID) of all frames received on the port is
changed to the specified value. By default, the EtherType is set to 0x88a8 (IEEE 802.1ad).
IEEE 802.1ad outlines the operation of Queue-in-Queue tagging which allows a service
provider to use a Virtual Bridged Local Area Network to provide separate VLAN instances
to multiple independent customers over the same medium using double tagged frames.
When Port Type is set to S-port or S-custom-port, the port will change the EtherType of all
frames received to indicate that double-tagged frames are being forwarded across the
switch. The switch will pass these frames on to the VLAN indicated in the outer tag. It will
not strip the outer tag, nor change any components of the tag other than the EtherType
field.
◆
Port
–
Port identifier.
◆
Port Type
–
Configures how a port processes the VLAN ID in ingress frames. (Default:
Unaware)
■ C-port – For customer ports, each frame is assigned to the VLAN indicated in the VLAN
tag, and the tag is removed.
■ S-port – For service ports, the EtherType of all received frames is changed to 0x88a8 to
indicate that double-tagged frames are being forwarded across the switch. The switch will
pass these frames on to the VLAN indicated in the outer tag. It will not strip the outer tag,
Summary of Contents for GEP-1070
Page 80: ...80 authentication from any point within the network...
Page 168: ...168...