completely missed the point and broken every rule of ospf
YOU DECIDE
steve
From: Chuck Larrieu
Reply-To: Chuck Larrieu
To: [EMAIL PROTECTED]
Subject: RE: OSPF Hub and Spoke [7:9268]
Date: Fri, 22 Jun 2001 01:15:31 -0400
John, this one's got me to thinking a little bit. Your kinda right
Neiberger
Sent: Thursday, June 21, 2001 6:55 AM
To: [EMAIL PROTECTED]
Subject:Re: OSPF Hub and Spoke [7:9268]
Yes, I'm replying to myself.
While doing some reading it occurred to me why *not* extending area 0
across
the WAN links should not work. In OSPF, unlike IS-IS, an area
completely missed the point and broken every rule of ospf
YOU DECIDE
steve
From: Chuck Larrieu
Reply-To: Chuck Larrieu
To: [EMAIL PROTECTED]
Subject: RE: OSPF Hub and Spoke [7:9268]
Date: Fri, 22 Jun 2001 01:15:31 -0400
John, this one's got me to thinking a little bit. Your kinda right
:[EMAIL PROTECTED]] On Behalf Of John
Neiberger
Sent: Friday, June 22, 2001 7:32 AM
To: [EMAIL PROTECTED]
Subject:RE: OSPF Hub and Spoke [7:9268]
Yep, you are correct. I see now that as long as non-zero areas receive
LSAs from a router configured as area zero, then the routing tables
thank you ,my learn-ed friends.
it seems asif i am finally getting it
From: John Neiberger
Reply-To: John Neiberger
To: [EMAIL PROTECTED]
Subject: RE: OSPF Hub and Spoke [7:9268]
Date: Fri, 22 Jun 2001 10:46:15 -0400
I don't know about the genius part. :-) But, you've described
I don't know about the genius part. :-) But, you've described the
initial scenario I was asking about. In my original post I wasn't
suggesting that this would be a good design by any means. I simply was
wondering if it was possible and how you'd configure it.
In this particular case, the
ROTECTED]
Subject: RE: OSPF Hub and Spoke [7:9268]
Yep, you are correct. I see now that as long as non-zero areas receive
LSAs from a router configured as area zero, then the routing tables will
be built and all should be well. This makes more sense to me, anyway,
but some of what I've r
Yes, I'm replying to myself.
While doing some reading it occurred to me why *not* extending area 0 across
the WAN links should not work. In OSPF, unlike IS-IS, an area is defined by
links, not routers. The rule states that interarea traffic must go through
area 0. Well, if areas are
John,
I just tried this out, and the newer IOS versions (after 11.2) *will* let
you use a loopback interface as area 0 with different non-zero areas
defined on the spokes.
There is no reason for the traffic actually to travel over the area 0 link,
but area 0 must be in the hub router for the
As far as I can see, both scenarios would work, as long as you have an area
0 defined somewhere. If you put the links into individual area, then you
would at least have to have area 0 on the ethernet or a loopback on the hub
router.
A router does not implicitly assume the role of backbone router
Thank you for clarifying that. I was having some difficulty reconciling
this and I was curious about how it might behave in a production
environment. I doubt I'd ever configure a network like this, I just
wondered if it was even possible to configure. The way our network is
designed, if we
, June 21, 2001 9:09 AM
To: [EMAIL PROTECTED]
Subject:Re: OSPF Hub and Spoke [7:9268]
John,
I just tried this out, and the newer IOS versions (after 11.2) *will* let
you use a loopback interface as area 0 with different non-zero areas
defined on the spokes.
There is no reason
: OSPF Hub and Spoke [7:9268]
John,
I just tried this out, and the newer IOS versions (after 11.2) *will*
let
you use a loopback interface as area 0 with different non-zero areas
defined on the spokes.
There is no reason for the traffic actually to travel over the area 0
link,
but area 0 must
:Re: OSPF Hub and Spoke [7:9268]
John,
I just tried this out, and the newer IOS versions (after 11.2) *will*
let
you use a loopback interface as area 0 with different non-zero areas
defined on the spokes.
There is no reason for the traffic actually to travel over the area 0
link,
but area
ROTECTED]
Subject: Re: OSPF Hub and Spoke [7:9268]
John,
I just tried this out, and the newer IOS versions (after 11.2) *will*
let
you use a loopback interface as area 0 with different non-zero areas
defined on the spokes.
There is no reason for the traffic actually to travel over the area
--
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf
Of
Pamela Forsyth
Sent: Thursday, June 21, 2001 9:09 AM
To: [EMAIL PROTECTED]
Subject: Re: OSPF Hub and Spoke [7:9268]
John,
I just tried this out, and the newer IOS versions (after 11.2)
*will*
let
you use a loopback i
forward the packet to the backbone
router first :-
How's stuff, Pamela?
Chuck
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf
Of
Pamela Forsyth
Sent: Thursday, June 21, 2001 9:09 AM
To: [EMAIL PROTECTED]
Subject: Re: OSPF Hub and Spoke
A technique I like to use in hub-and-spoke networks is to declare a
LAN interface as area 0.0.0.0. If I subsequently add a backup
router, I'll also connect that to the same LAN. It's reasonable to
connect TFTP, DHCP, etc., there as well, but not any application
servers.
If I do have
)
Chuck
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of John
Neiberger
Sent: Thursday, June 21, 2001 6:55 AM
To: [EMAIL PROTECTED]
Subject:Re: OSPF Hub and Spoke [7:9268]
Yes, I'm replying to myself.
While doing some reading it occurred to me
If you have a number of routers on the end of each WAN
link then you might want to extend area 0 to include
those links and terminate on the remote routers. You
might also be able to get away with not really having
an area 0 on an actual network by creating a loopback
interface and placing it by
think about conguring virtual link(s) on your backbone router with an area
border router that has an interface in area zero.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=9272t=9268
--
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