VICIdial: how to upgrade Asterisk, from 1.8 to Asterisk 11?

[f_rojas]

Hello everybody,

I've a VICIdial server deployed as follow:

1. Dell PowerEdge T430 Server
2. 16 GB of RAM
3. Intel(R) Xeon(R) CPU E5-2603 v3 @ 1.60GHz with 6 cores
4. HDD PERC H330 Adp with 1 TB of capacity
5. VICIdial version: 2.10-451a
6. Asterisk version: 1.8.23.0-vici1

My questions are:

1. ¿How i do to update Asterisk from 1.8 23.0-vici1 to asterisk-11.22.0-vici?
2. ¿If action above requires VICIdial's update too, how I do to do that?
3. ¿What recommendations should I keep in mind to update Asterisk in a production server?

Thanks in advance for your help.

Greetings.