Redundancy for Internet and LAN

Greetings,

Had an issue where my LAN connection to the Internet was disconnected due to the switch failing that connects the LAN to the sonic wall. This cut off all my VMs including the exchange server. I also had no way to remote in. Didn't realize until I went to the server room and saw the switch down. I actually had another switch fail simultaneously.

My question is how can I implement redudancy? The sonic wall is a NSA 240. It has one port labeled LAN which I use for the LAN. It also has four other ports labeled X0 through X4, I think from memory. I use X0 for the primary WAN and X2 for the backup. Can I use one of those X ports for alternative LAN to a second switch (still have the LAN port connected to a switch as the primary connection)?

Thanks a lot. This caused a huge problem during the recent hurricane and subsequent implementation of the DR plan.
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king daddyAsked:
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Exchange_GeekCommented:
Why not approach sonic wall folks for this sort of design?

If this is so critical, I'm sure they'll suggest to you a design that they expertise with (and of course persuade you to purchase fifteen of their products), but at least you'll be made cognizant of the design part.

Regards,
Exchange_Geek
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zarokCommented:
Not alot you can do when multiple switches fail at the same time for your main LAN, bad luck! However, with my setup, I have a different subnet on a different switch for all my servers, all connected to the iLO ports on HP Servers with this all powered by UPS. Most Rack servers have these simular ports. So regardless if the LAN network goes down, I can still remotely access each server.

There are ways of setting up switch redundancy, but this involves a great deal of configuration with each server needing 2 Lan IPs. I considered this myself, but the complexity outweighs the need.

Buy decent switch's lol. Do not spare any expense when buying a good switch which forms the centrepoint of LAN communications. Use the iLO ports, they will save you when the time comes!
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king daddyAuthor Commented:
Totally bad luck! Thanks for the info. I'll definitely check out the iLO option. So the server subnet has a LAN connection? My servers are VMware so adding an additional subnet would be easy. Though, not sure how that would help me keep a connection to the Internet for email and terminal servers, which is critical, when I still have a single point of failure - either the firewall, the cable, or the main LAN switch.

Thanks again
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Exchange_GeekCommented:
I'm afraid you're VMs won't have ILO. ILO is to access the server NOT VM's :(

I'd have to agree invest in a smarter switch.

Regards,
Exchange_Geek
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king daddyAuthor Commented:
I was a bit confused about iLO being used for this. I use iLO on my VMware HP do 360s but I figured that wouldn't do much for me in this situation. The main switch that failed was a procurve 2910, I think. Either way, it's a procurve that's about 3 years old and had no issues that entire time. The other was a trend net. Definitely on the cheaper side but it never had a problem either. I moved all the cables to a one-year-old procurve for now.

Still looking for a solution for Internet redundancy though. Not 2 ISPs, I have that. I mean essentially getting rid of the single point of failure (firewall, cable to LAN switch, and the main LAN switch itself). Not sure how feasible it is to have two sonic walls, with multiple switches interconnecting the servers and workstations. But I'm open to that if someone has a design that works for them.

Thanks
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king daddyAuthor Commented:
That is definitely one option.
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