Juniper E-Series

Abstract: An apparatus and method is provided for facilitating the seamless handoff of IP connections between access routers in an IP network. The mobile IP network includes two or more access routers each serving a different geographic service area. When a mobile terminal moves from the first service area to the second service area, the mobile terminal transmits to the second access router the IP address of the previous access router. The second access router uses this information to learn capabilities of the first access router (e.g., bandwidths supported, security schemes, and the like) for use in future handoff decisions, and exchanges capability information with the first access router. The assumption is made based on the exchanged information that the access routers are geographically proximate. When another mobile terminal transitions from one service area to another, the system selects an optimal target access router based on the previously learned information, including the inferred geographic proximity between access routers.

Abstract: An arrangement and a method is provided for discovering candidate access routers in a mobile IP (Internet Protocol) network to enable seamless IP handover of a mobile node between access routers. A server element (19), which is separate from the access routers (11, 12) and the mobile node (MN), is provided with access router information relating to one or more access routers and with information identifying the access router serving the mobile node and reachability information about one or more access routers other than the serving access router that are within reach to the mobile node. The address of at least one of said one or more access routers within reach to the mobile node is determined in the server element on the basis of the provided information.

Abstract: Software routers can lead us from a network of special-purpose hardware routers to one of general-purpose extensible infrastructure - if, that is, they can scale to high speeds. We identify the challenges in achieving this scalability and propose a solution: a cluster-based router architecture that uses an interconnect of commodity server platforms to build software routers that are both incrementally scalable and fully programmable.

Abstract: A system for determining a topology associated with a network such as an enterprise network (100). The system includes a data collection agent (204) configured to (a) identify a first set of routers (104c) from among a larger, second set of routers (104a-g) in an enterprise network (100), (b) contact each of the routers in the first set of routers (104c) but not each of the routers in the second set of routers (104a-g), and (c) load network information maintained by at least some of the contacted routers in the first set of routers (104c). The loaded network information can then be used to form a network or routing topology of the enterprise network (100).