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I currently have two Sonicwall Network Appliances: A primary NSA 3600 and a secondary HA unit, also NSA 3600. They are configured in a non-stateful HA. My question is about the length of failover between the two setups. Can anyone give me a rough idea of how long a system will be down in a non-stateful HA setup? From what I understand a stateful setup is basically seamless and instantaneous. If a non-stateful HA setup is only a couple of minutes that's not that big a deal. Does stateful HA bring any other benefits to the table to justify the $800 license cost?<br />
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Also, am I right in understanding that the separate Active/Active feature just shares some of the work between the primary and secondary so the primary isn't doing all of the heavy lifting? Does anyone know if the benefits in throughput are noticeable?<br />
<br />
Thanks
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I currently have two Sonicwall Network Appliances: A primary NSA 3600 and a secondary HA unit, also NSA 3600. They are configured in a non-stateful HA. My question is about the length of failover between the two setups. Can anyone give me a rough idea of how long a system will be down in a non-stateful HA setup? From what I understand a stateful setup is basically seamless and instantaneous. If a non-stateful HA setup is only a couple of minutes that's not that big a deal. Does stateful HA bring any other benefits to the table to justify the $800 license cost?

Also, am I right in understanding that the separate Active/Active feature just shares some of the work between the primary and secondary so the primary isn't doing all of the heavy lifting? Does anyone know if the benefits in throughput are noticeable?

Thanks

Stateful vs Non-stateful HA on Sonicwalls

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.