From: Claudine DEMAR (lkcnet00@xxxxxxxxxxx)
Date: Thu Jul 25 2002 - 11:43:10 GMT-3
Hello,
Question:
I've done a lab including OSPF and IGRP redistribution.
R1 ---- R2
R1 shares an interface with R2 in IGRP Routing domain. R1 has other
interfaces
in OSPF areas and therefore perform mutual redistribution.
R2 has 3 loopback interfaces which are IGRP's:
10.1.16.0/24, 10.1.17.0/24, 10.1.18.0/24
Redistribution works fine as the other routers in the OSPF areas have routes
for
the 3 loopback networks on R2
The problem is that in the OSPF DB, I have something in the OSPF DB that I
can't explain:
I have the 3 LSAtype5 for the redistributed loopback networks of R2 but
instead of having
10.1.16.0/24, 10.1.17.0/24 and 10.1.18.0/24 I have:
10.1.16.255/24, 10.1.17.0/24, 10.1.18.0/24.
For some reason, the 10.1.16.0/24 appears with host bits in the LSA LINK ID
whereas the others are
correct. Is it the effect of subnet0 ?? is it a bug ? Is it normal ?
Any explanation would be greatful. I enclosed the sh run on R1, show ip osp
da ex on R1
and show ver on R1.
R7#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-I-L), Version 12.1(15), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Mon 13-May-02 23:02 by kellythw
Image text-base: 0x03041DD4, data-base: 0x00001000
ROM: System Bootstrap, Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE
SOFTWARE
(fc1)
BOOTLDR: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c)XB1,
PLATFORM SP
ECIFIC RELEASE SOFTWARE (fc1)
R7 uptime is 20 minutes
System returned to ROM by power-on
System image file is "flash:/c2500-i-l.121-15.bin"
cisco AS2509-RJ (68030) processor (revision I) with 14336K/2048K bytes of
memory
.
Processor board ID 14830089, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
8 terminal line(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)
Configuration register is 0x2102
LS age: 493
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 10.1.16.255 (External Network Number )
Advertising Router: 192.168.255.7
LS Seq Number: 80000001
Checksum: 0x952F
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 100
Forward Address: 0.0.0.0
External Route Tag: 0
LS age: 494
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 10.1.17.0 (External Network Number )
Advertising Router: 192.168.255.7
LS Seq Number: 80000001
Checksum: 0x8A39
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 100
Forward Address: 0.0.0.0
External Route Tag: 0
R7#sh run
Building configuration...
Current configuration : 1491 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R7
!
enable secret 5 $1$KtTd$ZcfVmyfA/aU1D2fI0yRXp1
!
!
!
!
!
ip subnet-zero
no ip domain-lookup
!
!
!
!
interface Ethernet0
ip address 172.17.10.70 255.255.255.0 secondary
ip address 10.1.5.1 255.255.255.0
!
interface Serial0
no ip address
encapsulation frame-relay
!
interface Serial0.110 point-to-point
ip address 10.1.128.1 255.255.255.0
frame-relay interface-dlci 110
!
interface Serial0.120 point-to-point
ip address 10.1.129.2 255.255.255.0
frame-relay interface-dlci 120
!
interface Serial0.130 point-to-point
ip address 10.1.130.1 255.255.255.0
frame-relay interface-dlci 130
!
router ospf 2001
router-id 192.168.255.7
log-adjacency-changes
redistribute igrp 2001 metric 100 subnets
network 10.1.5.1 0.0.0.0 area 0
network 10.1.128.1 0.0.0.0 area 0
network 10.1.129.2 0.0.0.0 area 0
!
router igrp 2001
redistribute ospf 2001 metric 10000 100 254 1 1500
passive-interface Ethernet0
passive-interface Serial0.110
passive-interface Serial0.120
network 10.0.0.0
!
ip classless
no ip http server
!
!
line con 0
line 1 4
exec-timeout 0 0
transport input telnet
stopbits 1
flowcontrol hardware
line 5
exec-timeout 0 0
transport input telnet
stopbits 1
line 6 8
exec-timeout 0 0
transport input telnet
stopbits 1
flowcontrol hardware
line aux 0
line vty 0 4
exec-timeout 0 0
no login
!
end
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