Network visible inter-logical router links
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United States of America Patent
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N/A
Issued Date -
Jun 21, 2007
app pub date -
Dec 21, 2005
filing date -
Dec 21, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A scheme for allowing logical routers to achieve data path efficiency and still maintain network visible virtual links is provided by allowing logical routers in the same physical router to share routing information using standard protocols in place of proprietary route leaking, and by analyzing received data packets to determine if they are tandem data packets or terminating data packets. Tandem data packets are routed directly to egress ports with a single pass through the switch fabric to achieve efficiency, while the TTL value of the packet is decremented twice to maintain the external appearance of the separation of the logical routers. Terminating data packets are routed to other logical routers over virtual links to allow network visibility of the inter-logical router links.
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