Searching for data from a particular IP range using Splunk

I use Splunk 6 (free) for some basic keyword searching.  Generally I just add a specific IP address and a keyword, and I get a hit if it has been indexed.  My IP ranges are usually Class C, and I just used something like 10.10.10.* when wanting to search for that particular keyword in the subnet.

Recently I needed to do searches found in much larger IP ranges.  For example 101.2.176.0 to 101.2.191.255.
How would I define that range with Splunk?  I have looked at some articles, and there they used 101.2.176.0/20 format, but for the life of me I am unable to get it to work in my Splunk searches.

So, if my keyword was "error", and my range was 101.2.176.0 to 101.2.191.255, how would I add that to a Splunk search?
hbcitAsked:
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btanExec ConsultantCommented:
Probably tab on the answers.splunk forum for such queries, I input the "ip range" to search in the forum as below.
http://answers.splunk.com/search.html?f=&redirect=search%2Fsearch&sort=relevance&q=ip+range&type=question

Some may be useful below.

Search for multiple IP ranges - using where and cidrmatch or octet range rule
http://answers.splunk.com/answers/13251/search-for-multiple-ip-ranges.html

Using CIDR in a lookup table - Create a CSV lookup table with your subnets
http://answers.splunk.com/answers/5916/using-cidr-in-a-lookup-table.html

Conditional search for multiple IP ranges e.g. IP regex such as regex clientaddress="10\.([1-9]|[1-9][0-9]|1[0-9][0-9]|200)\.([8-9][0-9]|1[0-9][0-9])\.(2(3[1-9]|4[0-9]|5[0-4]))"
http://answers.splunk.com/answers/13251/search-for-multiple-ip-ranges.html
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