One unique quality of the extcommunity cost is it will not be advertised to eBGP neighbors even if you have the send community option on an eBGP session. It only works within an Autonomous system including confederations.
So if a question said to apply community values and use a value that will not be sent to any eBGP peers even if you have the send-community configured on the peer. Beyond that it is just another way to apply communities. I hope this helps you. Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Technical Instructor - IPexpert, Inc. Mailto: [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com <http://www.ipexpert.com/> From: [email protected] [mailto:[email protected]] On Behalf Of Mustafa Yadav Sent: Wednesday, May 12, 2010 3:42 AM To: ccie_rs Subject: [OSL | CCIE_RS] set extcommunity cost hi , How can a quaeiton come for asking set extcommunity cost?and can you please give a good example for this usage?
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