I cleaned this up a lot from version 1.0
- I was able to assign the /26 to the LAN interface
- /30 subnets are replaced with /27 subnets throughout the network
Solution that uses no static routes or ip default networks:
LAN --- R1 -(serial)- R2 -(serial)- R3
r1#sh run
Building configuration...
Current configuration:
!
! Last configuration change at 17:16:23 EST Mon Sep 24 2001 by sfeldberg
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname r1
!
no logging console
!
ip subnet-zero
ip tcp synwait-time 5
no ip domain-lookup
ip host r2 2001 1.1.1.1
ip name-server 216.248.176.20
ip name-server 216.248.176.21
clock timezone EST -5
!
!
!
interface Loopback0
ip address 192.116.1.193 255.255.255.224
no ip directed-broadcast
ip ospf network point-to-point
!
interface Loopback99
ip address 1.1.1.1 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0
ip address 192.116.1.33 255.255.255.224 secondary
ip address 192.116.1.2 255.255.255.224 secondary
ip address 192.116.1.1 255.255.255.192
no ip directed-broadcast
!
interface Ethernet1
ip address A.B.C.D 255.255.255.0 (Internet)
no ip directed-broadcast
!
interface Serial0
ip address 192.116.1.161 255.255.255.224
no ip redirects
no ip directed-broadcast
no ip mroute-cache
ntp broadcast destination 192.116.1.162
no fair-queue
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
router ospf 1
network 192.116.1.0 0.0.0.63 area 2
network 192.116.1.160 0.0.0.31 area 0
network 192.116.1.192 0.0.0.31 area 2
area 2 range 192.116.1.0 255.255.255.224
area 2 range 192.116.1.32 255.255.255.224
!
ip classless
ip route 0.0.0.0 0.0.0.0 A.B.C.D (Internet)
!
alias exec cl clear line 1
!
line con 0
privilege level 15
logging synchronous
transport input none
escape-character 1
line aux 0
session-timeout 15
no exec
transport input all
line vty 0 4
privilege level 15
logging synchronous
login local
escape-character 1
!
ntp master
end
r1#
r1#sh ip route
Gateway of last resort is A.B.C.D to network 0.0.0.0 (Internet - does not
affect lab outcome)
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback99
A.B.0.0/24 is subnetted, 1 subnets
C A.B.C.D is directly connected, Ethernet1
192.116.1.0/24 is variably subnetted, 7 subnets, 2 masks
C 192.116.1.160/27 is directly connected, Serial0
C 192.116.1.192/27 is directly connected, Loopback0
C 192.116.1.32/27 is directly connected, Ethernet0
C 192.116.1.0/27 is directly connected, Ethernet0
C 192.116.1.0/26 is directly connected, Ethernet0
O E1 192.116.1.96/27 [110/74] via 192.116.1.162, 00:31:42, Serial0
O IA 192.116.1.64/27 [110/128] via 192.116.1.162, 00:31:42, Serial0
S* 0.0.0.0/0 [1/0] via 168.28.179.1
r2#sh run
Building configuration...
Current configuration:
!
! Last configuration change at 17:14:21 EST Mon Sep 24 2001
! NVRAM config last updated at 17:14:32 EST Mon Sep 24 2001
!
version 11.2
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname r2
!
!
ip subnet-zero
no ip domain-lookup
ip host R3 2001 2.2.2.2
clns routing
!
clock timezone EST -5
!
interface Loopback0
ip address 192.116.1.129 255.255.255.224
!
interface Loopback99
ip address 2.2.2.2 255.255.255.255
no ip directed-broadcast
!
interface Ethernet0
no ip address
shutdown
!
interface Serial0
ip address 192.116.1.162 255.255.255.224
ntp broadcast client
no fair-queue
clockrate 64000
!
interface Serial1
ip address 192.116.1.65 255.255.255.224
clockrate 64000
!
router ospf 1
redistribute igrp 1 metric 10 metric-type 1 subnets route-map IGRP2OSPF
network 192.116.1.64 0.0.0.31 area 1
network 192.116.1.160 0.0.0.31 area 0
!
router igrp 1
redistribute ospf 1 metric 1 1 1 1 1 route-map OSPF2IGRP
passive-interface Serial0
network 192.116.1.0
!
ip classless
access-list 1 permit 192.116.1.192
access-list 1 permit 192.116.1.32
access-list 1 permit 192.116.1.0
access-list 2 permit 192.116.1.96
route-map IGRP2OSPF permit 10
match ip address 2
!
route-map OSPF2IGRP permit 10
match ip address 1
!
!
tftp-server flash c2500-js56-l.112-26a.bin
alias exec cl clear line 1
!
line con 0
privilege level 15
logging synchronous
transport input none
escape-character 2
line aux 0
session-timeout 15
no exec
transport input all
line vty 0 4
privilege level 15
no login
escape-character 2
!
ntp server 192.116.1.161
end
r2#sh ip route
Gateway of last resort is not set
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback99
192.116.1.0/27 is subnetted, 7 subnets
C 192.116.1.160 is directly connected, Serial0
C 192.116.1.128 is directly connected, Loopback0
O IA 192.116.1.192 [110/65] via 192.116.1.161, 00:32:29, Serial0
O IA 192.116.1.32 [110/74] via 192.116.1.161, 00:31:59, Serial0
O IA 192.116.1.0 [110/74] via 192.116.1.161, 00:32:29, Serial0
I 192.116.1.96 [100/8976] via 192.116.1.66, 00:00:35, Serial1
C 192.116.1.64 is directly connected, Serial1
r2#
r3#sh run
Building configuration...
Current configuration:
!
! Last configuration change at 17:13:34 EST Mon Sep 24 2001
! NVRAM config last updated at 17:13:51 EST Mon Sep 24 2001
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname r3
!
!
clock timezone EST -5
ip subnet-zero
no ip domain-lookup
ip host R4 2001 3.3.3.3
!
!
!
!
interface Loopback0
ip address 192.116.1.97 255.255.255.224
no ip directed-broadcast
!
interface Loopback99
ip address 3.3.3.3 255.255.255.255
no ip directed-broadcast
!
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
ip address 192.116.1.66 255.255.255.224
no ip directed-broadcast
no ip mroute-cache
ntp broadcast client
no fair-queue
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
router igrp 1
network 192.116.1.0
!
no ip http server
ip classless
!
alias exec cl clear line 1
!
line con 0
privilege level 15
logging synchronous
transport input none
escape-character 3
line aux 0
session-timeout 15
no exec
transport input all
line vty 0 4
privilege level 15
no login
escape-character 3
!
ntp server 192.116.1.161
end
r3#sh ip route
Gateway of last resort is not set
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback99
192.116.1.0/27 is subnetted, 7 subnets
I 192.116.1.160 [100/10476] via 192.116.1.65, Serial0
I 192.116.1.128 [100/8976] via 192.116.1.65, Serial0
I 192.116.1.192 [100/10002001] via 192.116.1.65, Serial0
I 192.116.1.32 [100/10002001] via 192.116.1.65, Serial0
I 192.116.1.0 [100/10002001] via 192.116.1.65, Serial0
C 192.116.1.96 is directly connected, Loopback0
C 192.116.1.64 is directly connected, Serial0
r3#ping 192.116.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/60/64 ms
r3#ping 192.116.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/58/60 ms
r3#ping 192.116.1.33
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.33, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/58/60 ms
r3#
Steve
Stephen
Feldberg To: "Ben-Shalom, Omer" <omer.ben-shalom@xxxxxxxxx>
cc: ccielab@xxxxxxxxxxxxxx, nobody@xxxxxxxxxxxxxx
09/24/2001 Subject: Re: Question on redistribution between VLSM and non VLSM
12:01 PM enabled rout e protocols(Document link: Stephen Feldberg)
Solution that uses no static routes or ip default networks:
This is an ugly hack, but you made the rules... the only requirement I
could not follow "to the letter" was to implement a /26 without further
subnetting it. My solution includes the equivalent address range of a /26,
but with only 16 usable host addresses. I am working on other
alternatives...
r1#sh run
Building configuration...
Current configuration:
!
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname r1
!
no logging console
!
ip subnet-zero
ip tcp synwait-time 5
no ip domain-lookup
ip host r2 2001 1.1.1.1
ip name-server 216.248.176.20
ip name-server 216.248.176.21
clock timezone EST -5
!
!
!
interface Loopback0
ip address 192.116.1.233 255.255.255.252
no ip directed-broadcast
ip ospf network point-to-point
!
interface Loopback99
ip address 1.1.1.1 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0
ip address 192.116.1.5 255.255.255.252 secondary
ip address 192.116.1.9 255.255.255.252 secondary
ip address 192.116.1.13 255.255.255.252 secondary
ip address 192.116.1.17 255.255.255.252 secondary
ip address 192.116.1.21 255.255.255.252 secondary
ip address 192.116.1.25 255.255.255.252 secondary
ip address 192.116.1.29 255.255.255.252 secondary
ip address 192.116.1.33 255.255.255.252 secondary
ip address 192.116.1.37 255.255.255.252 secondary
ip address 192.116.1.41 255.255.255.252 secondary
ip address 192.116.1.45 255.255.255.252 secondary
ip address 192.116.1.49 255.255.255.252 secondary
ip address 192.116.1.53 255.255.255.252 secondary
ip address 192.116.1.57 255.255.255.252 secondary
ip address 192.116.1.61 255.255.255.252 secondary
ip address 192.116.1.1 255.255.255.252
no ip directed-broadcast
!
interface Serial0
ip address 192.116.1.237 255.255.255.252
no ip redirects
no ip directed-broadcast
no ip mroute-cache
no fair-queue
!
router ospf 1
network 192.116.1.0 0.0.0.63 area 2
network 192.116.1.232 0.0.0.3 area 3
network 192.116.1.236 0.0.0.3 area 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 168.28.179.1
!
alias exec cl clear line 1
!
line con 0
privilege level 15
logging synchronous
transport input none
escape-character 1
line aux 0
session-timeout 15
no exec
transport input all
line vty 0 4
privilege level 15
logging synchronous
login local
escape-character 1
!
end
r1#sh ip route
Gateway of last resort is A.B.C.D to network 0.0.0.0 (Internet connection,
does not affect outcome of lab)
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback99
192.116.1.0/24 is variably subnetted, 21 subnets, 2 masks
O IA 192.116.1.241/32 [110/65] via 192.116.1.238, 00:03:16,
Serial0
O E1 192.116.1.252/30 [110/74] via 192.116.1.238, 00:03:16,
Serial0
O IA 192.116.1.248/30 [110/128] via 192.116.1.238, 00:03:16,
Serial0
C 192.116.1.236/30 is directly connected, Serial0
C 192.116.1.232/30 is directly connected, Loopback0
C 192.116.1.52/30 is directly connected, Ethernet0
C 192.116.1.48/30 is directly connected, Ethernet0
C 192.116.1.60/30 is directly connected, Ethernet0
C 192.116.1.56/30 is directly connected, Ethernet0
C 192.116.1.36/30 is directly connected, Ethernet0
C 192.116.1.32/30 is directly connected, Ethernet0
C 192.116.1.44/30 is directly connected, Ethernet0
C 192.116.1.40/30 is directly connected, Ethernet0
C 192.116.1.20/30 is directly connected, Ethernet0
C 192.116.1.16/30 is directly connected, Ethernet0
C 192.116.1.28/30 is directly connected, Ethernet0
C 192.116.1.24/30 is directly connected, Ethernet0
C 192.116.1.4/30 is directly connected, Ethernet0
C 192.116.1.0/30 is directly connected, Ethernet0
C 192.116.1.12/30 is directly connected, Ethernet0
C 192.116.1.8/30 is directly connected, Ethernet0
S* 0.0.0.0/0 [1/0] via A.B.C.D (Internet connection, does not affect
outcome of lab)
r2#sh run
Building configuration...
Current configuration:
!
version 11.2
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname r2
!
!
ip subnet-zero
no ip domain-lookup
ip host R3 2001 2.2.2.2
!
clock timezone EST -5
!
interface Loopback0
ip address 192.116.1.241 255.255.255.252
!
interface Loopback99
ip address 2.2.2.2 255.255.255.255
no ip directed-broadcast
!
interface Ethernet0
no ip address
shutdown
!
interface Serial0
ip address 192.116.1.238 255.255.255.252
no fair-queue
clockrate 64000
!
interface Serial1
ip address 192.116.1.249 255.255.255.252
clockrate 64000
!
router ospf 1
redistribute igrp 1 metric 10 metric-type 1 subnets route-map
IGRP2OSPF
network 192.116.1.236 0.0.0.3 area 0
network 192.116.1.240 0.0.0.3 area 1
network 192.116.1.248 0.0.0.3 area 1
!
router igrp 1
redistribute ospf 1 metric 1 1 1 1 1 route-map OSPF2IGRP
passive-interface Serial0
network 192.116.1.0
!
ip classless
access-list 1 permit 192.116.1.240
access-list 1 permit 192.116.1.236
access-list 1 permit 192.116.1.232
access-list 1 permit 192.116.1.52
access-list 1 permit 192.116.1.48
access-list 1 permit 192.116.1.60
access-list 1 permit 192.116.1.56
access-list 1 permit 192.116.1.36
access-list 1 permit 192.116.1.32
access-list 1 permit 192.116.1.44
access-list 1 permit 192.116.1.40
access-list 1 permit 192.116.1.20
access-list 1 permit 192.116.1.16
access-list 1 permit 192.116.1.28
access-list 1 permit 192.116.1.24
access-list 1 permit 192.116.1.4
access-list 1 permit 192.116.1.0
access-list 1 permit 192.116.1.12
access-list 1 permit 192.116.1.8
access-list 2 permit 192.116.1.252
route-map IGRP2OSPF permit 10
match ip address 2
!
route-map OSPF2IGRP permit 10
match ip address 1
!
alias exec cl clear line 1
!
line con 0
privilege level 15
logging synchronous
transport input none
escape-character 2
line aux 0
session-timeout 15
no exec
transport input all
line vty 0 4
privilege level 15
no login
escape-character 2
!
end
r2#sh ip route
Gateway of last resort is not set
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback99
192.116.1.0/30 is subnetted, 21 subnets
C 192.116.1.240 is directly connected, Loopback0
I 192.116.1.252 [100/8976] via 192.116.1.250, 00:00:00, Serial1
C 192.116.1.248 is directly connected, Serial1
C 192.116.1.236 is directly connected, Serial0
O IA 192.116.1.232 [110/65] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.52 [110/74] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.48 [110/74] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.60 [110/74] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.56 [110/74] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.36 [110/74] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.32 [110/74] via 192.116.1.237, 00:04:04, Serial0
O IA 192.116.1.44 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.40 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.20 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.16 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.28 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.24 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.4 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.0 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.12 [110/74] via 192.116.1.237, 00:04:05, Serial0
O IA 192.116.1.8 [110/74] via 192.116.1.237, 00:04:05, Serial0
r3#sh run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname r3
!
!
clock timezone EST -5
ip subnet-zero
no ip domain-lookup
ip host R4 2001 3.3.3.3
!
!
!
!
interface Loopback0
ip address 192.116.1.253 255.255.255.252
no ip directed-broadcast
!
interface Loopback99
ip address 3.3.3.3 255.255.255.255
no ip directed-broadcast
!
interface Serial0
ip address 192.116.1.250 255.255.255.252
no ip directed-broadcast
no ip mroute-cache
no fair-queue
!
router igrp 1
network 192.116.1.0
!
ip classless
!
alias exec cl clear line 1
!
line con 0
privilege level 15
logging synchronous
transport input none
escape-character 3
line aux 0
session-timeout 15
no exec
transport input all
line vty 0 4
privilege level 15
no login
escape-character 3
!
end
r3#sh ip route
Gateway of last resort is not set
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback99
192.116.1.0/30 is subnetted, 21 subnets
I 192.116.1.240 [100/8976] via 192.116.1.249, Serial0
C 192.116.1.252 is directly connected, Loopback0
C 192.116.1.248 is directly connected, Serial0
I 192.116.1.236 [100/10476] via 192.116.1.249, Serial0
I 192.116.1.232 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.52 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.48 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.60 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.56 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.36 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.32 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.44 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.40 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.20 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.16 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.28 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.24 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.4 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.0 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.12 [100/10002001] via 192.116.1.249, Serial0
I 192.116.1.8 [100/10002001] via 192.116.1.249, Serial0
r3#ping 192.116.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/61/64
ms
r3#ping 192.116.1.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/60/64
ms
r3#ping 192.116.1.9
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.9, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/60/60
ms
r3#ping 192.116.1.57
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.57, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/59/60
ms
r3#ping 192.116.1.61
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.61, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/60/60
ms
r3#ping 192.116.1.65
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.116.1.65, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Steve
"Ben-Shalom,
Omer" To: ccielab@xxxxxxxxxxxxxx
<omer.ben-shalom@ cc:
intel.com> Subject: Question on redistribution between VLSM and non VLSM
Sent by: enabled rout e protocols
nobody@xxxxxxxxxx
.com
09/24/2001 03:52
AM
Please respond to
"Ben-Shalom,
Omer"
As it seems from previous posting the IP ranges may be dictated in the new
lab the following question becomes even more important:
Assume you have a class C address (say 192.116.1.0/24) that you are curving
between 3 routers
LAN --- R1 -(serial)- R2 -(serial)- R3
R1 and R2 should be part of an OSPF area 0 (example)
R2 and R3 should be part of an IGRP AS, OSPF is not allowed on R3.
suppose R1 must implement a /26 for a LAN , all routers must implement a
loopback address and we need connectivity between all 3 routers with:
Assume the following two extra requirements:
A. No static routes.
(OR)
B. No default networks or other last resort routes
(OR)
C. no static or default networks
R2 needs to pass the route information for the LAN on R1 somehow to R3,
because of address limitations not all networks can use /26 of course,
especially due to the use of loopback addresses.
Problem is all are using the same classfull net and IGRP cannot support
VLSM
so for all R3 knows all the
network is using /30 (if that is the mask on the serial and that is likely
to be the case).
Any ideas on how to best solve this in case A (simple) , B (I can see one
very ugly answer but don't like it) and C (I am lost here) will be most
welcome, I think that dictating IP addressing will see a lot of
redistribution problems.
Thanks
Omer.
**Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
_______________________________________________________
To unsubscribe from the CCIELAB list, send a message to
majordomo@xxxxxxxxxxxxxx with the body containing:
unsubscribe ccielab
