The User Agent field of the Inktomi crawler will have the Slurp identification labled clearly. You will need to view the raw server logs to see this.
Some older log analyzers still feed off of the IP designation which Yahoo has not updated yet (that is according to Tim Mayer of Yahoo). This is the correct way of doing analysis for the User Agent field can be spoofed. The software "should" be updated to properly identify the crawler as Slurp (think of Inktomi as an alias).
If you run the IP of the spider thru a reverse DNS check, you will see Yahoo all over it and the email for abuse, queries, and admin are all Slurp[at]Yahoo.com. In the Answer Section of these crawlers, the DNS information has not been changed -- it will say something like
lj1163.inktomisearch.com, but the UA field says
Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp).