Re: ospf question

From: Daniel Free (danrose111@earthlink.net)
Date: Thu Apr 24 2003 - 15:26:05 GMT-3


RE: ospf question Hi Dan,
I just tested this scenario in my home lab and yet again
discovered why this CCIE trek of ours is maddening!!!!!!!
You can have AREA 0 authentication defined and not add
the password to the virtual-link. As long as you do not add it
on both sides of the virtual-link. My initial response was for
if you had one side configured with a password and the other
not. I took off the passwords on both sides of the link and it
came up fine. I strongly suggest however you should practice using the
password on the virtual-link commands.
That would be the so called Cisco way I beleive :)
        Danny
  ----- Original Message -----
  From: Danny.Andaluz@triaton-na.com
  To: danrose111@earthlink.net ; phreakinphunk@hotmail.com ;
ccielab@groupstudy.com
  Sent: Thursday, April 24, 2003 9:32 AM
  Subject: RE: ospf question

  Here's my config. Another person posted here that it worked for him the
same.

  sh run
  Building configuration...

  Current configuration : 925 bytes
  !
  version 12.1
  no service single-slot-reload-enable
  service timestamps debug uptime
  service timestamps log uptime
  no service password-encryption
  !

  hostname r567

  interface Loopback0
   ip address 1.1.1.1 255.255.255.0
  !
  interface Serial0
   no ip address
   shutdown

  !
  interface Serial1
   ip address 2.2.2.2 255.255.255.0
  !
  interface FastEthernet0
   ip address 3.3.3.3 255.255.255.0
   speed auto
  !
  router ospf 1
   log-adjacency-changes
   area 0 authentication message-digest
   area 89 virtual-link 99.99.99.99
   network 2.2.2.0 0.0.0.255 area 89
   network 3.3.3.0 0.0.0.255 area 45
  !
  ip classless
  no ip http server
  !
  !
  line con 0
  line aux 0
  line vty 0 4
   login
  !
  end

  -----Original Message-----
  From: Daniel Free [mailto:danrose111@earthlink.net]
  Sent: Thursday, April 24, 2003 3:38 AM
  To: Teck PhrEAk!!; Andaluz, Danilo, Triaton/NA; ccielab@groupstudy.com
  Subject: Re: ospf question

      Hi,
  Sorry to have to disagree but you need to configure the password on the
virtual link in your sample scenario. Check ip ospf virtual and see if the
adjacency is full. Probably not. Check the below link. Thanks. Best of luck.

      Danny
  http://www.cisco.com/warp/public/104/27.html

  ----- Original Message -----
  From: "Teck PhrEAk!!" <phreakinphunk@hotmail.com>
  To: <Danny.Andaluz@triaton-na.com>; <ccielab@groupstudy.com>
  Sent: Thursday, April 24, 2003 2:24 AM
  Subject: Re: ospf question

> Hi Danny,
>
> Yes, creating a virtual-link is like extending the boundary of area
> 0.....the implementation of a virtual-link requires area 0
> authentication
  on
> the other side of the virtual-link , the one which does not have any
> interfaces in area 0.
>
> also b'coz you are creating a virtual-link......and no actual
> interfaces
  are
> involved in creating a virtual-link you dont require interface
> authentication.
>
> cheers,
>
> sumit.
>
>
>
>
> >From: Danny.Andaluz@triaton-na.com
> >Reply-To: Danny.Andaluz@triaton-na.com
> >To: ccielab@groupstudy.com
> >Subject: ospf question
> >Date: Thu, 24 Apr 2003 00:44:13 -0400
> >
> >router ospf 1000
> > log-adjacency-changes
> > area 0 authentication message-digest
> > area 6 virtual-link x.x.x.x
> > network x.x.x.x 0.0.0.255 area 6
> > network x.x.x.x 0.0.0.255 area 10
> >
> >Hello,
> >
> >This router has a virtual link to area 0 through area 6. Area 0 is
> >doing authentication. I could not get the routes on the this router
> >into the rest of the ospf network unless I added the "area 0
> >authentication message-digest" on this router. This is very strange
> >since this router does
> >not have any interfaces in area 0. Unless the virtual link is like an
> >interface in Area 0. Also, I did not have to add the password anywhere
  on
> >the router. Strange. It's almost like half authentication. Can
> >someone explain this?
> >
> >TIA,
> >Danny
>
>
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