Hi Tyson I agree with you.
10.0.0.0/24 subnetted means that the last 8 host bits are taken for subnetting. 10.20.30.0/24 can't be part of 10.0.0.0/24 subnet rather it can be part of 10.0.0.0/16 or 10.0.0.0/8 subnet When we have configured the router interfaces from IP addresses from 10.60.0.0/16 and 10.20.30.0/24, the routing table informs that 10.0.0.0/8 is variably subnetted which seems to be correct. Even, if the router has a single subnet mask as in the example that I have mentioned earlier, "10.0.0.0/8 is variably subnetted" would have been better statement. Just want to share my thoughts :-) With regards Kings On Sat, Jun 25, 2011 at 11:24 AM, Tyson Scott <[email protected]> wrote: > What Tolulope said is correct.**** > > ** ** > > First it will tell you the major network boundary and mask that has been > applied to that boundary. Then it will list all /24 networks under that > address range with the given mask. That is how it will always show in the > routing table.**** > > ** ** > > Regards,**** > > **** > > Tyson Scott - CCIE #13513 R&S, Security, and SP > Managing Partner / Sr. 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*** > * > > ** ** > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Kingsley Charles > *Sent:* Friday, June 24, 2011 5:38 AM > *To:* Tolulope Ogunsina > > *Cc:* [email protected] > *Subject:* Re: [OSL | CCIE_Security] show ip route with subnets**** > > ** ** > > Hi Tolulope > > > I agree with you. But the interpretation of 10.0.0.0/24 is subnetted, 1 > subnets with the actual meaning of subnet, gives an incorrect meaning :-) > > With regards > Kings**** > > On Fri, Jun 24, 2011 at 2:42 PM, Tolulope Ogunsina <[email protected]> > wrote:**** > > Hi Kings, > > This is the normal behaviour of the output of the routing table. > > This is because 10.0.0.0 is a Class A address so when you configure any > mask other than /8, it reports as 'subnetted' > > The true meaning of that output is "10.0.0.0 is subnetted with a /24 mask" > > HTH,**** > > On Fri, Jun 24, 2011 at 8:10 AM, Kingsley Charles < > [email protected]> wrote:**** > > Hi all > > I have configured an interface with IP address of 10.20.30.41/24. The > "show ip route", claims that 10.0.0.0/24 is subnetted. I feel this is > incorrect. The IP address 10.20.30.41 is configured with subnet mask of 24 > bits and hence 10.20.30.41 is not in the subnets of 10.0.0.0/24. > 10.0.0.0/24 subnets can be like 10.0.0.16/28, 10.0.0.32/27, 10.0.0.64/26. > > Please let me know your thoughts. > > router#sh run int g0/1 > Building configuration... > > Current configuration : 99 bytes > ! > interface GigabitEthernet0/1 > ip address 10.20.30.41 255.255.255.0 > duplex auto > speed auto > end > > router1#sh ip route > Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 > E1 - OSPF external type 1, E2 - OSPF external type 2 > i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS > level-2 > ia - IS-IS inter area, * - candidate default, U - per-user static > route > o - ODR, P - periodic downloaded static route > > Gateway of last resort is not set > > 10.0.0.0/24 is subnetted, 1 subnets > C 10.20.30.0 is directly connected, GigabitEthernet0/1**** > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com**** > > > > > -- > Best Regards, > > Tolulope.**** > > ** ** >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
