Configuration
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zNID 24xx Series Configuration Guide
Tagged uplink port and tagged LAN ports
The diagram below shows an example where the traffic is received on the
LAN port with a VLAN tag (C-3) already included. In this case the VLAN tag
remains on the frame as it is sent to the network on the port that has been
designated as the Uplink port. Traffic that is received from the network is
expected to have the C-3 VLAN tag. That traffic is prioritized and forwarded
based on that VLAN tag. In this case the LAN Ethernet port is tagged,
therefore the C-3 VLAN tag is not stripped from the frame before being sent
to the LAN port as described in the previous example. In this case, the VLAN
tag is preserved.
Figure 158: Tagged uplink and tagged LAN ports
Each Ethernet port can be a member of a different VLAN. The ports can be
tagged or untagged. For this example both Ethernet ports are tagged. The web
page below shows the configuration for a zNID 24xx that is configured for
tagged Ethernet ports and tagged uplink port.
In this mode, if an untagged frame is received on the LAN port, a VLAN tag
will be added as defined by the PVID and the frame will be forwarded
upstream. In the downstream direction, the tagged frame will be passed to the
LAN port without any modifications. This could lead to undesirable results
since the device that sent untagged frames probably expects to receive
untagged frames.
S-Tagged
S-Tag or QinQ is a method of adding a second VLAN tag to an Ethernet
frame. This can be useful for Service providers that have multiple clients on
the same ONU, or for business applications in which the client has their
network segmented with multiple private VLANs that may conflict with
VLANs in use by other customers of the same service provider. The S-Tag
concept allows the service provider to take tagged traffic from a customer
network and transport that traffic though through the network on a single
VLAN without the traffic from one client interfering with the traffic from
another client. The client ports are unaware of the double tag, since it is
stripped before the Ethernet frame is sent to the LAN port.
The outer S-tag is identified by a unique Tag Protocol Identifier (TPID).
Typical values for the TPID are 88A8, 8100, 9100, 9200, or 9300. The default
Summary of Contents for zNID-GE-2402
Page 12: ...About This Guide 12 zNID 24xx Series Configuration Guide ...
Page 18: ...zNID 24xx Series 18 zNID 24xx Series Configuration Guide ...
Page 84: ...Management 84 zNID 24xx Series Configuration Guide Figure 57 View audit log ...
Page 199: ...VLANS zNID 24xx Series Configuration Guide 199 Figure 157 Configuration of VLAN settings ...
Page 208: ...Configuration 208 zNID 24xx Series Configuration Guide ...
Page 220: ...Troubleshooting tests 220 zNID 24xx Series Configuration Guide ...
Page 223: ...Voice zNID 24xx Series Configuration Guide 223 Voice Figure 175 ...
Page 226: ...Index 226 zNID 24xx Series Configuration Guide ...