Non-stop routing

Alcatel’s new Carrier Environment Internet System – ACEIS – is claimed to be the first non-stop routing technology for three key Internet routing protocols.

Alcatel’s new Carrier Environment Internet System – ACEIS – is claimed to be the first non-stop routing technology for three key Internet routing protocols: Border Gateway Protocol (BGP), Intermediate System to Intermediate System (IS-IS) and Open Shortest Path First (OSPF).

The company claims that the technology eliminates core network downtime traditionally caused by corrupt routing information or routine software upgrades.

ACEIS itself is a combination of hardware and software that is integrated with Alcatel’s core networking products, initially including the Alcatel 7770 Routing Core Platform (RCP) and the Alcatel 7670 Routing Switch Platform (RSP).

BGP has proven to be the most difficult protocol to adapt to non-stop routing, due to the large amount of transmission control protocol (TCP) session information that must be maintained at all times. This is especially important during software upgrades and control-complex switchovers.

In the past, a number of partial solutions have been created to provide high availability routing and non-stop forwarding, but Alcatel says that it is the first to achieve ‘true’ non-stop routing for core networks.

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