From: Khurram Khani (kkhani@xxxxxxxxxxxxxxxxxx)
Date: Tue May 14 2002 - 20:52:37 GMT-3
Folks,
I have a Router in Area 100. Original OSPF Router-ID was 1.160.240.99
I created a new loopback10 on this router assigned ip 160.160.160.1 to the
loopback interface 10 on this Router. Removed "router ospf 1" command from
the
Router and pasted it back so that Router can select new Loopback ID.
It came up fine with new OSPF Router-ID 160.160.160.1. When it established
the adjacency with its neighbour and state went to FULL. I can see the old
Router-ID
still in OSPF LSDB (Database)
Router Link States (Area 100)
Link ID ADV Router Age Seq# Checksum Link count
1.160.240.99 1.160.240.99 988 0x80000117 0x9F31 3 ---->
invalid entry !!!!
10.160.240.10 10.160.240.10 609 0x800000B9 0x4C5 1
160.160.160.1 160.160.160.1 609 0x80000003 0xDE2D 3 ----->
changed Router ID from 1.160.240.99 to 160.160.160.1
Putting the protocol analyzer on the link, I found that actually the
neighbour sends during DDs
Exchange neighbour is sending that LSA as part of DDB update, and then my
Router sends out a
LSR to get full update.
My question is , how to cleanup OSPF Database and when these entries will
age out in database???
Below is my LSDB dump
Cisco2500-1#sh ip os da
OSPF Router with ID (160.160.160.1) (Process ID 1)
Router Link States (Area 100)
Link ID ADV Router Age Seq# Checksum Link count
1.160.240.99 1.160.240.99 988 0x80000117 0x9F31 3 ---->
invalid entry !!!!
10.160.240.10 10.160.240.10 609 0x800000B9 0x4C5 1
160.160.160.1 160.160.160.1 609 0x80000003 0xDE2D 3 ----->
changed Router ID from 1.160.240.99 to 160.160.160.1
Net Link States (Area 100)
Link ID ADV Router Age Seq# Checksum
48.0.0.1 10.160.240.10 610 0x80000038 0x4F54
Summary Net Link States (Area 100)
Link ID ADV Router Age Seq# Checksum
90.90.2.0 10.160.240.10 572 0x800000AE 0x1D15
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
25.0.0.0 160.160.160.1 648 0x80000001 0xCDE9 0
25.0.1.0 160.160.160.1 648 0x80000001 0xC2F3 0
25.0.2.0 160.160.160.1 648 0x80000001 0xB7FD 0
134.0.0.0 10.160.240.10 573 0x800000AC 0x25AD 0
Sonic2500-1#
config dump
Sonic2500-1#sh run
Building configuration...
Current configuration:
!
version 11.2
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname Sonic2500-1
!
enable secret 5 $1$ZyJJ$Iz6rBgFfa2bHITTJHHTAK1
!
ip subnet-zero
!
interface Loopback0
ip address 1.160.240.99 255.255.255.255
!
interface Loopback1
ip address 160.160.160.1 255.255.255.0
!
interface Loopback10
ip address 78.78.78.1 255.255.255.0
!
interface Ethernet0
ip address 48.0.0.2 255.255.255.0
!
interface Ethernet1
ip address 10.160.240.99 255.255.255.0
ip ospf priority 255
!
interface Serial0
no ip address
shutdown
!
interface Serial1
no ip address
shutdown
!
router ospf 1
redistribute static metric 1 subnets route-map range
network 48.0.0.0 0.0.0.255 area 100
network 160.0.0.0 0.255.255.255 area 100
network 78.0.0.0 0.255.255.255 area 100
!
no ip classless
ip route 0.0.0.0 0.0.0.0 10.160.240.1
ip route 25.0.0.0 255.255.255.0 Loopback10
ip route 25.0.1.0 255.255.255.0 Loopback10
ip route 25.0.2.0 255.255.255.0 Loopback10
ip route 134.177.211.0 255.255.255.0 10.160.240.1
access-list 1 permit 25.0.0.0 0.255.255.255
access-list 101 permit ip 25.0.0.0 0.255.255.255 any log
route-map range permit 10
match ip address 1
!
bridge 1 protocol ieee
!
line con 0
line aux 0
line vty 0 4
password rwa
login
!
end
Sonic2500-1#
Sonic2500-1#
Sonic2500-1#sh ip os ne
Neighbor ID Pri State Dead Time Address Interface
10.160.240.10 1 FULL/DR 00:00:34 48.0.0.1 Ethernet0
Sonic2500-1#
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