Cisco phone bootup baseline and tuning example
Baselining a Cisco 8832 Phone
The problem with baselining is that very few people do them. In some cases the analyst has ‘paralysis due to analysis”. In other words they over think what is involved in producing a baseline and never do one.
I will give you the best tip I know regarding baselining; “just capture and start something”. Don’t worry about ‘getting everything’ or expecting to ‘understand every packet you see’. Decide on a goal for your baseline and meet that goal.
One of my favorite baselines is a ‘boot-up’ baseline since it contains so much valuable information. Examples of what I like to generally record is;
Client mac address
Network captured from (i.e VLAN, subnet, etc)
Boot time
Total Bytes or packets transferred
Protocol used and not used
List of servers client converses with
Dhcp options and any relay ip helper address information
Commands not responded to
Of course every device or application will have additional items to document but the goal here is to document how the data was captured, tool used and the immediate goal you identified. The same trace file can be used for other future reviews or as a baseline
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