Re: Classful and classless

From: Tim Fletcher (tim@fletchmail.net)
Date: Fri Apr 25 2003 - 12:12:07 GMT-3


Kashif,

RIP v2 is classless, so there are no classful/classless boundaries here.
The problem with your config is that your OSPF process is 100, but you're
redistributing ospf 1 in your RIP config. Fix that and everything should
work fine.

-Tim Fletcher #11406

At 04:00 AM 4/25/2003 -0700, Kash wrote:
>Hi All,
>
>One of my friends has come up with this
>problem/question. What is the best way(s) for
>redistribution between classful and classless?
>
>I am also a bit confused on this, I have checked the
>books and one of the way that they say is using static
>routes, I am quite sure we cant use that one as static
>routes till allowed cant be used(in the lab).
>
>Particularly its the problem below. router r1 is able
>to ping the other routes, and r2 being having rip is
>not.
>
>Kashif
>
>r1#sr
>interface Loopback0
> ip address 10.7.7.7 255.255.255.0
>!
>interface Ethernet0
> ip address 172.31.200.7 255.255.255.128
> ip ospf authentication-key cisco
>!
>interface Serial0
> ip address 172.31.78.7 255.255.255.240
> no fair-queue
>!
>!
>router ospf 100
> log-adjacency-changes
> area 567 authentication
> redistribute connected subnets
> redistribute rip subnets
> network 172.31.200.0 0.0.0.127 area 567
>!
>router rip
> version 2
> redistribute connected metric 1
> redistribute ospf 1
> passive-interface Ethernet0
> network 172.31.0.0
> default-metric 2
> no auto-summary
>!
>router bgp 700
> no synchronization
> bgp log-neighbor-changes
> redistribute ospf 1 match external 2
> neighbor 172.31.78.8 remote-as 800
> neighbor 172.31.200.5 remote-as 96
>!
>end
>
>r1#sir
>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, 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
>
> 172.31.0.0/16 is variably subnetted, 5 subnets, 4
>masks
>C 172.31.200.0/25 is directly connected,
>Ethernet0
>O IA 172.31.12.0/24 [110/84] via 172.31.200.5,
>05:56:50, Ethernet0
> [110/84] via 172.31.200.6,
>05:56:50, Ethernet0
>O IA 172.31.100.0/29 [110/74] via 172.31.200.5,
>05:56:50, Ethernet0
> [110/74] via 172.31.200.6,
>05:56:50, Ethernet0
>O E2 172.31.69.0/24 [110/20] via 172.31.200.6,
>05:56:50, Ethernet0
>C 172.31.78.0/28 is directly connected, Serial0
> 10.0.0.0/8 is variably subnetted, 7 subnets, 3
>masks
>O IA 10.2.2.2/32 [110/75] via 172.31.200.5,
>05:56:52, Ethernet0
> [110/75] via 172.31.200.6,
>05:56:52, Ethernet0
>O E2 10.9.9.0/24 [110/20] via 172.31.200.6,
>05:37:59, Ethernet0
>O E2 10.5.5.0/24 [110/20] via 172.31.200.5,
>05:56:46, Ethernet0
>O E2 10.1.1.0/24 [110/20] via 172.31.200.5,
>05:56:52, Ethernet0
> [110/20] via 172.31.200.6,
>05:56:52, Ethernet0
>O E2 10.6.6.0/24 [110/20] via 172.31.200.6,
>05:56:52, Ethernet0
>R 10.0.0.0/8 [120/1] via 172.31.78.8, 00:00:03,
>Serial0
>C 10.7.7.0/24 is directly connected, Loopback0
>R 150.50.0.0/16 [120/1] via 172.31.78.8, 00:00:03,
>Serial0
>
>r1#ping 10.1.1.1
>
>Type escape sequence to abort.
>Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is
>2 seconds:
>!!!!!
>Success rate is 100 percent (5/5), round-trip
>min/avg/max = 68/72/81 ms
>r1#
>
>
>__________________________________________________________________
>r2#sr
>interface Loopback0
> ip address 10.8.8.8 255.255.255.0
>!
>interface Serial0
> ip address 172.31.78.8 255.255.255.240
> no fair-queue
> clockrate 64000
>!
>router rip
> version 2
> network 10.0.0.0
> network 172.31.0.0
>!
>router bgp 800
> bgp log-neighbor-changes
> neighbor 172.31.78.7 remote-as 700
>!
>r2#sir
>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, 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
>
> 172.31.0.0/16 is variably subnetted, 2 subnets, 2
>masks
>R 172.31.200.0/25 [120/1] via 172.31.78.7,
>00:00:20, Serial0
>C 172.31.78.0/28 is directly connected, Serial0
> 10.0.0.0/24 is subnetted, 2 subnets
>R 10.7.7.0 [120/1] via 172.31.78.7, 00:00:20,
>Serial0
>C 10.8.8.0 is directly connected, Loopback0
> 150.50.0.0/24 is subnetted, 1 subnets
>C 150.50.4.0 is directly connected, Ethernet0
>r2#ping 10.1.1.1
>
>Type escape sequence to abort.
>Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is
>2 seconds:
>.....
>Success rate is 0 percent (0/5)
>r2#
>
>
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This archive was generated by hypermail 2.1.4 : Thu May 01 2003 - 13:36:06 GMT-3