Protecting connection traffic using filters
AssigneeJuniper Networks, Inc.
InventorsPing Pan, Der-Hwa Gan, Keith E. Holleman, Manoj Leelanivas, Nischal Sheth, Arun Vaidyanathan
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Abstract
A connection between network nodes in a communication network is backed up. A failover switched path such as a label-switched path (LSP) is created starting at a first network node of a connection and ending at the second node of the connection, while bypassing the protected connection. In the event of connection failure, data is transmitted through the failover switched path (e.g., LSP). A network operator can selectively protect different types of data by using filters that bind one or more types of traffic received over one or more interfaces to different failover switched paths (LSPs).
Claims20
A processor-implemented method for configuring failover switched paths for a communications connection between a first node and a second node, the processor-implemented method comprising:
- a) defining a first switched path from the first node to the second node, wherein the first switched path bypasses the communications connection;
- b) defining a second switched path from the first node to the second node, wherein the second switched path bypasses the communications connection, and wherein the second switched path differs from the first switched path;
- c) for all active routes of a first type that use the communications connection, creating a first additional next-hop gateway corresponding to the first switched path;
- and
- d) for all active routes of a second type that use the communications connection, creating a second additional next-hop gateway corresponding to the second switched path,
- wherein the processor includes at least one of a microprocessor, a network processor and integrated circuits, and
- wherein forwarding over at least one of the first and second switched paths is determined using at least one of (A) node port, (B) signal wavelength, (C) signal time slot, or (D) signal channel.
A node adapted to terminate a communications connection between it and another node, the node comprising:
- a) at least one storage device for storing
- i) an association of a first traffic type with a first failover switched path,
- ii) an association of a second traffic type with a second failover switched path, and
- iii) forwarding information used to forward received data;
- b) a forwarding facility adapted to receive data to be forwarded;
- and
- c) a communications connection failover facility for protecting received data to be forwarded over the communications connection when the communications connection has failed, the communication connection failover facility adapted to
- i) determine whether the received data is one of the first traffic type and the second traffic type,
- ii) responsive to a determination that the received data is of the first traffic type, selecting the first failover switched path associated with the first traffic type, and responsive to a determination that the received data is of the second traffic type, selecting the second failover switched path associated with the second traffic type, and
- iii) forwarding the received data over the selected one of the first and second failover switched paths, and
- wherein forwarding over at least one of the first and second switched paths is determined using at least one of (A) node port, (B) signal wavelength, (C) signal time slot, or (D) signal channel.
A processor-implemented method for configuring a failover switched path for a communications connection between a first node and a second node, the processor-implemented method comprising:
- a) defining a switched path from the first node to the second node, wherein the defined switched path bypasses the communications connection and is associated with at least one specific traffic type but not all traffic types;
- b) associating the communications connection with the defined switched path;
- and
- c) updating forwarding information that uses the communications connection in its next hop to include the defined switched path associated with the failed communications connection,
- wherein the processor includes at least one of a microprocessor, a network processor and integrated circuits, and
- wherein forwarding over at least one of the first and second switched paths is determined using at least one of (A) node port, (B) signal wavelength, (C) signal time slot, or (D) signal channel.
Dependencies are inferred from the claim text.