References

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a008013565f.shtml

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00802b7c35.html

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00803a9a88.html

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a00804357b1.html

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00803a9a24.html

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00803a9a23.html

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a0080435872.html

http://www.cisco.com/en/US/products/ps6642/products_white_paper0900aecd804fa16a.shtml