RE: OSPF Adv Tech Labs, problem:strange area range command

From: subodh.rawat@wipro.com
Date: Thu Aug 23 2007 - 09:14:16 ART

Cheers

________________________________

From: sirus MOGHADASIAN [mailto:cyrus.mgh@gmail.com]
Sent: Thursday, August 23, 2007 5:34 PM
To: Subodh Singh Rawat (WT01 - TELECOM SERVICE PROVIDER)
Cc: ccielab@groupstudy.com
Subject: Re: OSPF Adv Tech Labs, problem:strange area range command
issue

I've just figured it out what happened. I prohibited advertising 6.6.6.6
on R4 by "area 1 range 6.6.6.6 <http://6.6.6.6/> 255.255.255.255
<http://255.255.255.255/> not-advertise" and "forward address" of LSA
of 120.0.0.1 on R5 is 6.6.6.6.

so router has not a path to 6.6.6.6 so it's not gonna install 120.0.0.1
in it's routing table !!! even though it has 120.0.0.1 LSA.

So solution: area 1 nssa translate type7 suppress-fa on R4.

this solved the problem.

Sirus

area 1

On 8/23/07, sirus MOGHADASIAN <cyrus.mgh@gmail.com> wrote:

        By th way ,I see LSA for network 120.0.0.1 in r Database!!! but
no route in routing table.

        On 8/23/07, subodh.rawat@wipro.com <subodh.rawat@wipro.com>
wrote:

                Please paste ur configuration of R4, R1 and R6.

                Subodh

                -----Original Message-----
                From: nobody@groupstudy.com [mailto:
nobody@groupstudy.com <mailto:nobody@groupstudy.com> ] On Behalf Of
                sirus MOGHADASIAN
                Sent: Thursday, August 23, 2007 3:52 PM
                To: Cisco certification
                Subject: OSPF Adv Tech Labs, problem:strange area range
command issue

                I have a simple scenario. (it's diagram is as same as
advance
                technologies lab of IE ,OSPF,NSSA area ABR External
prefix Filtering)

                           |-----R4
                R6 -----| ----frame-Relay ---R5
                           |-----R1

                R6 connects to R4 and R1 through ethernet segment
(area 1)
                ,and R4 ,R1 ,R5 are connected by frame-relay cloud (R5
hub and R4 ,R1
                spoke) (area 0)

                R6 configuration:
                int loopback ip 6.6.6.6/32 .
                ip route 120.0.0.1 255.255.255.255 null0

                router ospf 1
                redistribute static
                area 1 nssa

                when I configure "area 1 range 6.6.6.6 255.255.255.255
not-advertised"
                on
                R4 something very strange happens.

                6.6.6.6 removed from R5 as expected, but I 120.0.0.1
removed as well
                !!!
                and no longer I cannot see 120.0.0.1 as my external
route.

                I configured area 1 as nssa (R1 R4 R6).

                why my external route disappears????

                by the way if i do not configure area 1 as nssa every
thing works fine

                thanks

This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:12 ART