http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/n
p1_c/1cbgp.htm
http://www.cisco.com/warp/customer/459/21.html
http://www.cisco.com/warp/customer/459/22.html
http://www.cisco.com/cpress/cc/td/doc/cisintwk/ics/icsbgp4.htm
http://www.cisco.com/warp/public/459/18.html