*** I work for Stonesoft ***
Hi,
A comment related to serial clustering technology in our product.
Typically, inline serial cluster deployment is considered when the IPS inspection capacity becomes a bottleneck but when the link has not been saturated yet. E.g. inline IPS deployment for 10Gbit link when traffic volume or packet size distribution may become a problem for a single IPS, but which a cluster of IPSs can still handle.
The StoneGate IPS serial clustering is a built-in active-active clustering solution that provides throughput scaling and high-availability for the network traffic inspection. In serial cluster, traffic passes through all the IPS nodes, but on a per-connection basis, only one node controls access and inspects the connection at the time. The other nodes simply bypass the traffic.
From network perspective, high availability can be provided the same way as it would be done for a network cable; with a redundant network topology. As an alternative solution for serial cluster throughput scaling, link aggregation solutions can be used with IPS systems too.
Tomi
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