Michael, You cannot announce a route with a Null0 for the next hop in a routing protocol. So you need the static route on the edge routers for the next hop of the route you are announcing. Thus when the routers recieve the RTBH route from the trigger router they will look at the next hop and see it is set to the route they are pointing to their Null0.
On Fri, Jan 29, 2010 at 7:08 AM, Michael Davis <[email protected]> wrote: > Thanks Kingsley – The DSG is correct. This guide also configures a static > Null0 on all the edge routers. I suppose I could ask the question then – Is > there any way to get the trigger router to advertise the null0 route via > bgp, rather than put it in statically on all the edge routers? Is my > thinking not logical? > > > > From: Kingsley Charles [mailto:[email protected]] > Sent: Friday, January 29, 2010 10:50 PM > To: Michael Davis > Cc: [email protected] > Subject: Re: [OSL | CCIE_Security] Lab 7a task 7.20 Source based RTBH > > > > Hi Michael > > > > I have attached a RTBH doc. > > > > With regards > > Kings > > On Fri, Jan 29, 2010 at 5:05 PM, Michael Davis <[email protected]> > wrote: > > Hi Everyone – I don’t understand the solution for task 7.20. I just > advertised the discard address route of 86.86.86.86 to null0 on the trigger > router (R6) using IBGP. The solution guide created static routes to this > address on all 3 routers. Is what I have done o.k? I would have thought it > easier to just advertise the dummy network via IBGP than to create static > routes to it on the individual routers. > > Does anyone know where to look in the documentation for RTBH? I have only > been able to find documentation using a google search. > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > -- Tyson Scott - CCIE #13513 R&S and Security Technical Instructor - IPexpert, Inc. Telephone: +1.810.326.1444 Fax: +1.810.454.0130 Mailto: [email protected] Join our free online support and peer group communities: http://www.IPexpert.com/communities IPexpert - The Global Leader in Self-Study, Classroom-Based, Video On Demand and Audio Certification Training Tools for the Cisco CCIE R&S Lab, CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab and CCIE Storage Lab Certifications. _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
