From: Jay Chandradas (jachandr@xxxxxxxxx)
Date: Sun Feb 04 2001 - 16:33:46 GMT-3
Thanks frank !!
i was making that mistake.. of putting 192.168.X.Y address. I tried with
172.16.x.y addresses and it worked.. I also did a ip classless on R2.
Thank
Jay.
At 12:26 PM 2/4/2001 +0000, you wrote:
>Hi Jay,
>
>be aware that 192.168.10.8/29 is not in part of the same major net as your
>IGRP interface (which is 192.168.1.0/24) at R1. So IGRP will advertise it
>as 192.168.10.0/24, using the same mask as its IGRP interface.
>
>Frank
>
>>From: Jay Chandradas <jachandr@cisco.com>
>>Reply-To: Jay Chandradas <jachandr@cisco.com>
>>To: <ccielab@groupstudy.com>
>>Subject: VLSM question
>>Date: Sun, 04 Feb 2001 02:22:33 -0800
>>
>>Hi all,
>>
>>I am trying a VLSM and classful routing prot. issue. I am little confused
>>when I tried in my set up. Can u help me?
>>
>>set up :
>>
>>
>>
>>R2 -------------------------------------------------------------
>>R1------------------------------------------------------R3 networks
>>included : 192.168.10.0/20
>> ( IGRP 192.168.1.0/24 IGRP ) (
>>ospf 192.168.5.0/24 ospf)
>>192.168.2.0/27
>>
>>
>>my aim is to ping the vlsm networks from R2, which is running only IGRP. I
>>thought R2 will not be able to ping 192.168.10.9 ( with a mask /29) . I was
>>trying to put a defalut network statement in R1 , thinking it will
>>propagate the default route to the down stream router R2. and it did. Then
>>I removed the default network statement from R1. But still I am able to
>>ping the vlsm networks from R2. Am I missing something here?.. I will show
>>the routing table for all the three routers for clarity.
>>
>>i know that for IGRP, if the route is a part of same major net as the
>>interface but has a different mask , IGRP does not advertise the route out
>>the interface- why is R1 advertizing the vlsm routes to R2?
>>
>>
>>router2#sh ip route
>>Codes: C - connected, S - static, I - IGRP, 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, E - EGP
>> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
>>default
>> U - per-user static route, o - ODR
>>
>>Gateway of last resort is not set
>>
>>I 192.168.10.0/24 [100/8576] via 192.168.1.1, 00:00:33, Serial0
>>I 192.168.5.0/24 [100/10476] via 192.168.1.1, 00:00:33, Serial0
>>I 10.0.0.0/8 [100/8576] via 192.168.1.1, 00:00:33, Serial0
>>C 193.168.1.0/24 is directly connected, Ethernet0
>>C 192.168.1.0/24 is directly connected, Serial0
>>I 192.168.2.0/24 [100/8576] via 192.168.1.1, 00:00:33, Serial0
>>router2#ping 192.168.10.9
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 192.168.10.9, timeout is 2
>>seconds: <------------------------------------ PINGS !!! I thought
>>wthout a default route it will not ping.
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 68/68/68 ms
>>router2#
>>
>>router1#sh ip r
>>09:50:52: %SYS-5-CONFIG_I: Configured from console by consoleoute
>>Codes: C - connected, S - static, I - IGRP, 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, E - EGP
>> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
>>default
>> U - per-user static route, o - ODR
>>
>>Gateway of last resort is not set
>>
>> 192.168.10.0/29 is subnetted, 1 subnets
>>O 192.168.10.8 [110/65] via 192.168.5.3, 00:14:04,
>>Serial0 <-----------------------------192.168.10.0 is
>>having 1 /29 bit mask.
>>C 192.168.5.0/24 is directly connected, Serial0
>>O E2 10.0.0.0/8 [110/100] via 192.168.5.3, 00:14:04, Serial0
>>I 193.168.1.0/24 [100/8576] via 192.168.1.2, 00:00:20, Serial1
>>C 192.168.1.0/24 is directly connected, Serial1
>> 192.168.2.0/27 is subnetted, 1 subnets
>>O 192.168.2.32 [110/74] via 192.168.5.3, 00:14:04, Serial0
>>router1#
>>router3#
>>09:51:19: %SYS-5-CONFIG_I: Configured from console by consolesh ip route
>>Codes: C - connected, S - static, I - IGRP, 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, E - EGP
>> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
>>default
>> U - per-user static route, o - ODR
>>
>>Gateway of last resort is not set
>>
>> 192.168.10.0/29 is subnetted, 1 subnets
>>C 192.168.10.8 is directly connected, Loopback10
>>C 192.168.5.0/24 is directly connected, Serial1
>>C 10.0.0.0/8 is directly connected, Loopback1
>>O E2 193.168.1.0/24 [110/100] via 192.168.5.1, 00:14:38, Serial1
>>O E2 192.168.1.0/24 [110/100] via 192.168.5.1, 00:14:38, Serial1
>> 192.168.2.0/27 is subnetted, 1 subnets
>>C 192.168.2.32 is directly connected, Ethernet0
>>router3#
>>
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