Hello Irfan,
is the switch acting as L2 switch or as L3 switch?
in first case you should find the server's MAC address in CAM table but not in the ARP table as there is no direct IP communication between L2 switch TCP/IP stack and the server.
In second case, if the switch is acting as L3 switch you should be able to see the ARP entry. However, if the L3 switch is configured with VRF lite a per VRF ARP table exists and the correct show to use should be:
show ip arp vrf
Hope to help
Giuseppe
