US 8,576,857 B2 · Automatically identifying an edge-facing router

Abstract

Techniques for automatically identifying an edge-facing router in a network are provided. In one technique, data is obtained at a first router of a subscriber network. The data may be included in a DHCP message or a NDP RA message. The first router determines, based on the data, whether the first router is a service provider (SP)-facing router, which is a router that is coupled to a SP router and no other router in the subscriber network is logically between the SP-facing router and the SP router. If it is determined that the first router is an SP-facing router, then the first router stores identification data that identifies the first router as an SP-facing router. Otherwise, the first router stores identification data that identifies the first router as a non-SP-facing router.

Claims25

Dependent claims

One or more machine-readable storage media storing instructions which instructions when executed by one or more processors, cause:

obtaining data at a first router of a subscriber network;
after obtaining the data, determining, at the first router of the subscriber network, based on the data, whether the first router is a service provider (SP)-facing router, wherein a SP-facing router is a router that is coupled to a SP router and no other router in the subscriber network is logically between the SP-facing router and the SP router;
if it is determined that the first router is an SP-facing router, then storing, at the first router of the subscriber network, identification data that identifies the first router as an SP-facing router in the subscriber network;
if it is determined that the first router is not an SP-facing router, then storing, at the first router of the subscriber network, identification data that identifies the first router as a non-SP-facing router in the subscriber network.

1 more element

A data packet router comprising:

one or more processors;
one or more storage media coupled to the one or more processors and storing instructions which instructions when executed by the one or more processors, cause:
obtaining data;
after obtaining the data, determining, at the data packet router, based on the data, whether the data packet router is a service provider (SP)-facing router, wherein an SP-facing router is a router that is coupled to a SP router and no other router in a subscriber network is logically between the SP-facing router and the SP router;
if it is determined that the data packet router is an SP-facing router, then storing, at the data router in the subscriber network, identification data that identifies the data packet router as an SP-facing router in the subscriber network;
if it is determined that the data packet router is not an SP-facing router, then storing at the data router in the subscriber, identification data that identifies the data packet router as a non-SP-facing router in the subscriber network.

3 more elements

A method comprising:

obtaining data at a first router of a subscriber network;
after obtaining the data, determining, at the first router of the subscriber network, based on the data, whether the first router is a service provider (SP)-facing router, wherein an SP-facing router is a router that is coupled to a SP router and no other router in the subscriber network is logically between the SP-facing router and the SP router;
if it is determined that the first router is an SP-facing router, then storing, at the first router of the subscriber network, identification data that identifies the first router as an SP-facing router in the subscriber network;
if it is determined that the first router is not an SP-facing router, then storing, at the first router of the subscriber network, identification data that identifies the first router as a non-SP-facing router in the subscriber network;
wherein the method is performed by one or more computers.

2 more elements

Dependencies are inferred from the claim text.

Automatically identifying an edge-facing router

Life of this patent

Automatically identifying an edge-facing router

Life of this patent

Abstract

Claims25