Since those blocks are allocatable, and since the new RFC does not include them, I would imagine you do not need to know them or include them in any ACL, HOWEVER, and yes its a big HOWEVER, how Cisco grades on this topic is unknown. So, in the end its really a personal call.
Regards, Brandon Carroll - CCIE #23837 Senior Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service Provider) Certification Training with locations throughout the United States, Europe and Australia. Be sure to check out our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com. On Sun, Jan 31, 2010 at 2:05 AM, Michael Davis <[email protected]>wrote: > Hi everyone – I have been reading rfc 3330 and have a question. There > are a few subnets: > > 39.0.0.0/8 > > 128.0.0.0/16 > > 191.255.0.0/16 > > 192.0.0.0/24 > > The RFC states the following regarding these subnets: > > “the basis for the reservation no longer applies and addresses in this > block are subject to future allocation to a Regional Internet Registry for > assignment in the normal manner.” > > Does this mean that we should not block these subnets??? Both Lab 7 and 8 > solutions in the DSG do block these ranges. > > My thinking for the real world (and possibly the exam) is that we only > block the following: > > 0.0.0.0/8, 10.0.0.0/8, 14.0.0.0/8, 24.0.0.0/8, 127.0.0.0/8, 169.254.0.0/16, > 172.16.0.0/12, 192.0.2.0/24, 192.88.99.0/24, 192.168.0.0/16, 192.18.0.0/15, > 223.255.255.0/24, 224.0.0.0/4, 240.0.0.0/4 > > Do we need to memorize these ranges for the exam? > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > >
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