True Ring Networks Using Tag VLAN Filtering
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United States of America Patent
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Issued Date -
Jan 28, 2010
app pub date -
Jul 25, 2008
filing date -
Jul 25, 2008
priority date (Note) -
Abandoned
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Abstract
A method in a network device configured in a true ring network where the network device has a first port and a second port connected to the true ring network and a third port connected to a processor including: connecting the network device to transmit data packets in a single direction around the true ring network including an ingress port and an egress port; enabling ingress tag VLAN filtering on the ingress port only; configuring a VLAN table in the network device to terminate an incoming data packet when a VID tag (VLAN identifier tag) of the incoming data packet matches the local VID tag of the network device; and configuring the VLAN table in the network device to accept the incoming data packet when the VID tag of the incoming data packet does not match the local VID tag of the network device.
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