SuSe Linux: Determine DHCP Server.

# cat /var/lib/dhcp/dhclient.leases
lease {
  interface "eth0";
  fixed-address 17.15.140.103;
  option subnet-mask 255.255.255.0;
  option routers 17.15.140.1;
  option dhcp-lease-time 3600;
  option dhcp-message-type 5;
  option domain-name-servers 17.15.24.5,17.15.75.48;
  option dhcp-server-identifier 17.15.24.5;
  option interface-mtu 576;
  option broadcast-address 255.255.255.255;
  option netbios-name-servers 17.15.24.2,17.15.8.7;
  option netbios-node-type 8;
  option domain-name "toronto.ca";
  renew 4 2013/02/07 15:24:35;
  rebind 4 2013/02/07 15:52:19;
  expire 4 2013/02/07 15:59:49;
}