Site-to-Site triangle

[ofir]

I have 2 sites connected with ASA 5520 Site-to-Site vpn. now I'm adding a 3rd location that will connect both original sites

the config should be the easy part (I assume it is the same concept going to each of them)

the question is more of a design\concept one: what are the hidden failure points, things i didn't think of etc - I must ensure this triangle function and avoid loops and other problems

[sean_evershed]

Have you seen this configuration guide? It outlines some of the design issues to consider:

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a00807f9a89.shtml

[ofir]

yes, I'm familiar to this article.

I was looking for more angles, personal expirience and points that doesn't show in this document