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Flooding packets on a per-virtual-network basis

  • US 9,806,906 B2
  • Filed: 03/09/2011
  • Issued: 10/31/2017
  • Est. Priority Date: 06/08/2010
  • Status: Active Grant
First Claim
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1. A switch, comprising:

  • one or more ports;

    lookup circuitry configured to determine an internal virtual network identifier for a packet based on an entry in a data structure in a local storage device, wherein the entry maps a virtual local area network (VLAN) identifier and a Virtual Private Network (VPN) identifier associated with the packet to the internal virtual network identifier;

    determining circuitry configured to, in response to determining that the packet needs flooding, determine a set of egress ports from the one or more ports for flooding the packet based on the internal virtual network identifier; and

    flooding circuitry configured to;

    determine whether to filter the packet for flooding at a first port in the set of egress ports based on whether the first port is associated with the VPN identifier;

    in response to determining not to filter the packet, associate the packet with the first port as an output port.

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