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not output on the show arp command

From my layer 3 Cisco switch, I could ping but when I did show arp, I could see a lot IP addresses, except my Why is that? Thanks
4 Solutions
AntzsInfrastructure ServicesCommented:
Is it on a different network segment separated by ACL or a Firewall?
leblancAccountingAuthor Commented:
Even though it is on a different segment, I should still see it in the ARP table, shouldn't I?
AntzsInfrastructure ServicesCommented:
Craig BeckCommented:
ARP is a layer-2 protocol.  If you ping an address that's on a different subnet you won't see the MAC address of the device.  You'll only see MAC addresses of devices on your layer-2 segment.
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