Comment Re:Don't mix the vendor networking gear? (Score 1) 54
I agree - it would be really odd to see an F5 and a Netscaler paired in an HA configuration in our experience and to do so would seem like a recipe for disaster. By network device we mean core and border routers, distribution and access switches, etc - the explanation is laid out much more clearly within the rule. The lowest rate of network failures and total calculated contribution to non-availability within our companies happened when the non-load balancing and non-fire-walling network devices were homogeneous. The companies we examined are mostly "hyper growth" and pushing the limits of scale with their size and speed of growth. It's entirely possible that if a company is in a low to no-growth situation such problems would never happen. After all, if one pushes the same level and type of traffic everyday it seems likely that the probability of a new problem happening without some other change is low. Speaking of Firewalls - we address them in an entirely different rule :)