From: yakout esmat (yesmat@xxxxxxxxxxxxxx)
Date: Mon Apr 22 2002 - 05:06:18 GMT-3
Ying,
I don't think I will need to 'clear ip ospf process' in this case.
I can't see any difference between your config and mine specially in first
scenario..
will try your configs and see the result. Could you try my config exactely
and see if it still works?
Will let you know the result
Cheers
Ya
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
ying chang
Sent: Monday, April 22, 2002 1:44 AM
To: yesmat@iprimus.com.au; ccielab@groupstudy.com
Subject: Re: OSPF Conditional Default Origination
Have you tried to clear the ip ospf process? The configuration looks OK to
me. I use my existing setup to simulate what you have, it works. See below
for what I did:
-------------------------------------------------------------
**** If subnet 133.10.17.0/24 exist, don't advertise default
****
router ospf 100
router-id 192.168.200.1
log-adjacency-changes
redistribute igrp 100 subnets tag 2 route-map igrp-routes
network 133.10.2.1 0.0.0.0 area 0
network 133.10.5.1 0.0.0.0 area 0
neighbor 133.10.2.4
neighbor 133.10.2.3
default-information originate always route-map default
distance 125 133.10.3.2 0.0.0.0
!
ip access-list standard sub17
deny 133.10.17.0 0.0.0.255
permit any
!
route-map default permit 10
match ip address sub17
!
r1#siod | beg -5 <<<--- no default route was generated
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
133.10.3.0 192.168.200.1 116 0x80000001 0x1BBD 2
133.10.17.0 192.168.200.1 116 0x80000001 0x804A 2
r1#
----------------------------------------------------
***** Break route-map to deny 10 and permit 20
*****
r1(config)#no route-map default
r1(config)#no ip access-list stand sub17
r1(config)#route-map default deny 10
r1(config-route-map)#match ip addr sub17
r1(config-route-map)#exit
r1(config)#route-map default permit 20
r1(config-route-map)#exit
r1(config)#ip access-list stand sub17
r1(config-std-nacl)#permit 133.10.17.0 0.0.0.255
r1(config-std-nacl)#exit
r1(config)#^Z
r1#ciop <<<--- clear ip process
Reset ALL OSPF processes? [no]: yes
r1#siod | beg -5 <<<--- no default route was generated
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
133.10.3.0 192.168.200.1 103 0x80000001 0x1BBD 2
133.10.17.0 192.168.200.1 103 0x80000001 0x804A 2
r1#
-----------------------------------------------------
***** If 133.10.17.0/24 exist, generate default route
*****
r1(config)#no ip access-list stand sub17
r1(config)#no route-map default
r1(config)#route-map default
r1(config-route-map)#match ip addr sub17
r1(config-route-map)#exit
r1(config)#ip access-list stand sub17
r1(config-std-nacl)#permit 133.10.17.0 0.0.0.255
r1(config-std-nacl)#exit
r1(config)#^Z
r1#ciop
00:56:58: %SYS-5-CONFIG_I: Configured from console by console
r1#ciop <<<--- clear ospf process
Reset ALL OSPF processes? [no]: yes
r1#siod | beg -5 <<<--- default route was generated
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 192.168.200.1 5 0x80000001 0xA873 100 <<<-
133.10.3.0 192.168.200.1 5 0x80000001 0x1BBD 2
133.10.17.0 192.168.200.1 5 0x80000001 0x804A 2
r1#
>From: "yakout esmat" <yesmat@iprimus.com.au>
>Reply-To: "yakout esmat" <yesmat@iprimus.com.au>
>To: "Groupstudy" <ccielab@groupstudy.com>
>Subject: OSPF Conditional Default Origination
>Date: Sun, 21 Apr 2002 20:43:55 +1000
>
>Hi all,
>
>I have a problem configuring OSPF Conditional Default Origination, my
>config
>as follows:
>
>!
>router ospf 100
> summary-address 198.168.0.0 255.255.0.0
> network 148.5.6.6 0.0.0.0 area 0
> network 148.5.16.6 0.0.0.0 area 0
> default-information originate route-map default
>!
>route-map default deny 10
> match ip address 3
>!
>route-map default permit 20
>!
>access-list 3 permit 148.5.5.0 0.0.0.255
>!
>end
>
>What I want to achieve is: If network 148.5.5.0/24 exists in the routing
>table DO NOT advertise the default route into OSPF Domain (which is
>represented by first instance of the route-map 10)
>
>Otherwise Advertise the default (which is covered by the second instance
>20)
>
>My observation is: it only works if the first instance permits the default
>based on the EXISTANCE of the network in the table, and denies the default
>if the network doesn't exist in the table.
>
>Do I have misunderstanding of the Conditional Default Origination or what??
>
>Any feed back is very much appreciated.
>
>Thanks in advance
>
>ya
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