In this chapter, we started with a look at NetScaler High Availability, which is key to ensuring that key services continue to be available despite a system-level issue on NetScaler. We looked at how the functionality works, which ports it uses, situations where High Availability can pose problems due to nodes not being able to see each other, and how to detect and remedy such situations.

In the second half of the chapter, we discussed how NetScaler handles packets it sees on the network, before focusing on layer 2 issues, which form the bulk of the network issues seen with NetScaler. We then concluded the chapter by touching on a couple of source IP-related areas and how to resolve them.

I hope this chapter has been useful to you. Please join me in the next as we look at troubleshooting the Application Firewall feature on NetScaler.