i want to know how to find the terminal or lst which is having the a particular mac id
my system cannot be connected from remote area in syslog it gives the mac add which is having a clash with my server ip , in my network there are more than 200 pc's and lts so i cant able to check physicaly . tell me how to trace the terminal with a particular macid

Well, If I've understood, what you want to know is the MAC of each PC connecting to your server, am I right? In that case, you will be able to know yor client IP giving:

who -u

netstat -an

arp -a

It mucheasier to do this from the network equipment level, since you should be able to identify the port on a switch the mac address is connected to.

First, temporarily, disconnect your server from the network.

Log into another machine on the same network.

If it's a unix client that is clashing:
telnet/ssh or whatever you use to connect to <ip of your server>. This should connect you to the rogue client.

If it's a windows machine and you logged into a different Solaris box
/usr/sfw/bin/nmblookup -A <ip of your server>
This should give you the netbios name and username of the person logged in.

Of course it is, but it's not very common that sysadmins have accesss to switches/routers/firewalls/etc... At least in my company

Yes, you right there, many have access to the network administrators who can get this information, but that is not always the case, that is why I offered a different way of finding the machine.