Classful and classless

From: Kash (kash2331@yahoo.com)
Date: Fri Apr 25 2003 - 08:00:41 GMT-3


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#



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