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: <mailto:[email protected]> [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: <http://www.ipexpert.com/chat> 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 <http://www.ipexpert.com/communities> www.ipexpert.com/communities and our public website at <http://www.ipexpert.com/> 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
