From: Mohmmad, Imran (Imran.Mohmmad@amd.com)
Date: Thu Apr 10 2008 - 16:34:01 ART
It will block the advertisement of all LSA from interface including the
default.
DS1/0--------S1/1RP
|
|
S1/0
A
|
|
/\
/ \
/ \
S1/0 S1/0
B C
Router D, RP and router A S1/0 is in area 0 and the router A se1/1 and
s1/2 in area 45 with two different point to point links.
Once we configured the area 45 as totally-stub the OIA SLA that we can
see on B and C is the default route and Router SLA for C link to router
A
A#sh run | sec router ospf
router ospf 10
log-adjacency-changes
area 45 stub no-summary
network 10.10.10.3 0.0.0.0 area 45 <Link to router C>
network 40.40.40.3 0.0.0.0 area 45<Link to router B>
network 192.168.30.3 0.0.0.0 area 0
B#sh ip os database
OSPF Router with ID (2.2.2.2) (Process ID 10)
Router Link States (Area 45)
Link ID ADV Router Age Seq# Checksum Link
count
2.2.2.2 2.2.2.2 569 0x80000001 0x007291 2
3.3.3.3 3.3.3.3 663 0x80000004 0x00E2C9 2
150.1.3.3 150.1.3.3 588 0x8000000B 0x00DD9C 4
Summary Net Link States (Area 45)
Link ID ADV Router Age Seq# Checksum
0.0.0.0 150.1.3.3 677 0x80000001 0x003769
B#sh ip route ospf
10.0.0.0/24 is subnetted, 1 subnets
O 10.10.10.0 [110/128] via 40.40.40.3, 00:02:59, Serial1/0
O*IA 0.0.0.0/0 [110/65] via 40.40.40.3, 00:02:59, Serial1/0
A#sh run int se1/1
Building configuration...
Current configuration : 198 bytes
!
interface Serial1/1
description ****Connected to B******
ip address 40.40.40.3 255.255.255.0
ip pim sparse-mode
encapsulation ppp
ip ospf database-filter all out
serial restart-delay 0
Once we filter-lsa advertisement on A, the B router is no longer have
any OSPF LSA including the default Summary.
B#sh ip os database
OSPF Router with ID (2.2.2.2) (Process ID 10)
Router Link States (Area 45)
Link ID ADV Router Age Seq# Checksum Link
count
2.2.2.2 2.2.2.2 3 0x80000001 0x007291 2
B#
B#
B#sh ip os database
OSPF Router with ID (2.2.2.2) (Process ID 10)
Router Link States (Area 45)
Link ID ADV Router Age Seq# Checksum Link
count
2.2.2.2 2.2.2.2 6 0x80000001 0x007291 2
B#sh ip route ospf
Imran
-----Original Message-----
From: Paul Cosgrove [mailto:paul.cosgrove@heanet.ie]
Sent: Thursday, April 10, 2008 3:14 AM
To: nagendra kumar
Cc: Mohmmad, Imran; atif raees; ccielab@groupstudy.com
Subject: Re: OSPF Inra Area route filtering
The command filters learned LSAs from being relayed on, so you should
still be able to send a default from the hub.
Paul.
nagendra kumar wrote:
> Hi,
>
> I guess this command will filter all LSAs and so itz our
responsibility to configure a default route in all spoke routers.
>
> Regards,
> Nagendra
>
> Paul Cosgrove <paul.cosgrove@heanet.ie> wrote: neighbor x.x.x.x
database-filter all out
>
> Paul.
>
> Mohmmad, Imran wrote:
>> Hi there,
>>
>> What you want to filter, route entering into the routing table from
OSPF
>> LSDB or the inter-area LSA itself?
>>
>> If you want to filter the route entering from OSPF LSDB to routing
table
>> you can use the distribute-list in on OSPF process,
>>
>> If you want to filter the Intra-Area LSA itself, then with in an area
it
>> is not possible.
>>
>> Imran
>>
>> -----Original Message-----
>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
>> atif raees
>> Sent: Wednesday, April 09, 2008 1:15 AM
>> To: ccielab@groupstudy.com
>> Subject: OSPF Inra Area route filtering
>>
>> Dear all
>>
>> i am experimenting a hub & spoke topology using FR.
>>
>> Each spoke has it on LAN
>>
>> Hub has area 0 & area 1 as totally stub are all FR spoke are in Area
1
>>
>> what i want to achieve is to filter (intra area ospf routes sent by
each
>> spoke) at hub site so that spoke can has just default route in it
>> routing
>> table which they already have as i have configured area 1 as totally
>> stub.
>>
>> is it possible.
>>
>> Atif Raees
>>
>>
>>
>> _________________________________________________________________
>> Pack up or back upuse SkyDrive to transfer files or keep extra
copies.
>> Learn
>> how.
>>
hthttp://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Re
>> fresh
>> _skydrive_packup_042008
>>
>>
This archive was generated by hypermail 2.1.4 : Thu May 01 2008 - 08:25:50 ART