Sh arp does not show mac address of IP --- ASA

Hi Everyone,
I can ping the IP from the ASA but when i do sh arp it does not show me mac address od that IP.
Need to know the reason behind this.
Regards
MAhesh

So your ASA should have a route on the inside interface to internal networks. The address of that next hop in the routing table is the one you should have in your arp table allowing you to reach non-directly-connected (subnet-wise) hosts within the scope of that route statement.
Think through the logic - ASA pings a host. It needs to determine proper egress interface. It checks and asks "Is it reachable via a directly connected interface (most preferred route)?" Answer no. "Do I have a route statement telling me how to get to it?" Answer yes (otherwise use default). OK - so ASA sends packet out egress interface defined in that route statement to the next hop as defined in route statement and waits for reply.

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Hi,
We have a network in the company where visitors\customers can connect their PCs to pick up a IP address & access the internet via our cluster of Checkpoint firewalls. The problem we are having is that whenever somebody with a Mac tries to use this network they cannot access the internet although it works fine for all Windows based PCs. So to investigate I got hold of a IBook & made the following observations.
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On a Mac after obataining a DHCP address & running "netstat -r" you get the following:
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.48.203 UGSc 5 5 en1
127 localhost UCS 0 0 lo0
localhost localhost UH 9 2477 lo0
169.254 link#5 UCS 0 0 en1
192.168.48/22 link#5 UCS 1 0 en1
192.168.48.203 link#5 UHRLW 4 30 en1
192.168.51.1 localhost UHS 0 1 lo0
Then after adding the mac address manualy it looks as follows & works fine:
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.48.203 UGSc 26 6 en1
127 localhost UCS 0 0 lo0
localhost localhost UH 9 12353 lo0
169.254 link#5 UCS 0 0 en1
192.168.48/22 link#5 UCS 0 0 en1
192.168.48.203 1:0:5e:7c:0:48 UHLS 26 28 en1
192.168.51.1 localhost UHS
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Sh arp does not show mac address of IP --- ASA

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