I don't have a Cat 4006 to confirm this command is available, but here's what you can do with a Cat 6500.
I hope it helps. Let me know if the Cat 4000 is different.
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M1_6500_C01 (enable) sho cam ?
agingtime Show cam aging time
count Showing cam total entries
dynamic Show dynamic cam entries
msfc Show cam Multilayer Switching Router info
permanent Show permanent cam entries
static Show static cam entries
system Show system cam entries
MAC address
M1_6500_C01 (enable) sho cam 08-00-20-c4-1c-a2
* = Static Entry. + = Permanent Entry. # = System Entry. R = Router Entry.
X = Port Security Entry $ = Dot1x Security Entry
VLAN Dest MAC/Route Des [CoS] Destination Ports or VCs / [Protocol Type]
---- ------------------ ----- -------------------------------------------
38 08-00-20-c4-1c-a2 3/1 [ALL]
Total Matching CAM Entries Displayed =1
M1_6500_C01 (enable)
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