1:
my_ip=`cat /proc/net/arp | grep eth0 | awk '{ print $1 }'`
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case `cat /proc/net/arp | grep eth0 | awk '{ print $1 }'` in 192.168.1.1) mount blah mount blub ;; 192.168.1.2) mount foo mount bar ;; *) echo "Unknown ip address!" exit 1 esac