Would Moving one of the AREA 1 Routers into (a new area) Area2 Fix this?
-Original Message-
From: Michael L. Williams [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 30, 2001 6:54 PM
To: [EMAIL PROTECTED]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Good call I was going
around with the costs to do asymmetrical routing.
-Original Message-
From: Hire, Ejay [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 31, 2001 2:02 PM
To:
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Would Moving one of the AREA 1 Routers into (a new area) Area2 Fix this?
-
o:[EMAIL PROTECTED]]
Sent: Thursday, May 31, 2001 2:02 PM
To:
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Would Moving one of the AREA 1 Routers into (a new area) Area2 Fix this?
-Original Message-
From: Michael L. Williams [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 30, 2001
I am not very sure but I believe OSPF will prefer
Intra-Area routes despite having an alternate path
that seemingly has a lower cost. Please correct me if I am
wrong. Could this be an administrative distance thing?
Kevin, just for clarification, what you are describing has nothing to
do with
]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
As you are likely aware, running TE over area borders isn't an available
option these days due to the loss of traffic engineering info at those
borders. Hence, migrating to a single area might enhance your ability to
engineer traffic in your
Van Oene
To:
Sent: Tuesday, May 29, 2001 3:03 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
As Alan correctly points out, path cost is irrelevant in this case as
intra
area routers will be preferred over inter.
We
tend to think that a small network could not be better served
nterarea traffic must traverse the backbone
rule,
because R2 *is* a backbone router.
This is not theory... It is fact.
Alan
- Original Message -
From: Andrew Larkins
To:
Sent: Monday, May 28, 2001 10:13 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
agr
OR you could switch the 1 and the 0 in your diagram and have a properly
designed network!
-peter slow, CCNBlah
- Original Message -
From: Michael L. Williams
To:
Sent: Tuesday, May 29, 2001 10:59 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Hey Chuck.. I just thought
Read carefully - routerA and routerB both have interfaces in Area0 and
Area1, which makes them both ABRs
-e-
- Original Message -
From: Michael L. Williams
To:
Sent: Wednesday, May 30, 2001 9:01 AM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Wait a second.. where
ichael L. Williams
To:
Sent: Wednesday, May 30, 2001 9:01 AM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Wait a second.. where are the ABRs?How can a router that
communicates routes from one OSPF area to another not be an ABR? Am I
missing something?
Mike W.
Kevin
by
R2. This satisfies the Interarea traffic must traverse the backbone
rule,
because R2 *is* a backbone router.
This is not theory... It is fact.
Alan
- Original Message -
From: Andrew Larkins
To:
Sent: Monday, May 28, 2001 10:13 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
PROTECTED]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
routerArouterB
AREA0AREA0
||
routerC routerD
AREA1-AREA1
Since we are on the topic of OSPF, could
Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Kevin Schwantz
Sent: Tuesday, May 29, 2001 7:03 AM
To: [EMAIL PROTECTED]
Subject:Re: Wanna Be a CCIE? Try This One [7:6076]
routerArouterB
AREA0AREA0
ject: RE: Wanna Be a CCIE? Try This One [7:6076]
agreedto area 0 then on to the intended area
-Original Message-
From: Circusnuts [mailto:[EMAIL PROTECTED]]
Sent: 28 May 2001 15:50
To: [EMAIL PROTECTED]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
C
... or route-map the router D network(s) to go through Router B at Router A
- Original Message -
From: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Place a summary route to null 0 for the networks on Router D on your OSPF
next time you recomend using bgp to fix an IGP problem, im going to.., well,
uh, just dont do it again.
- Original Message -
From: Chuck Larrieu
To:
Sent: Tuesday, May 29, 2001 10:38 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Run BGP on all routers and manipulate
>news:[EMAIL PROTECTED]...
... or route-map the router D network(s) to go through Router B at Router
A
- Original Message -
From: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Place a summary route to null 0 for the
: Andrew Larkins
To:
Sent: Monday, May 28, 2001 10:13 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
agreedto area 0 then on to the intended area
-Original Message-
From: Circusnuts [mailto:[EMAIL PROTECTED]]
Sent: 28 May 2001 15:50
To: [EMAIL PROTEC
etwork(s) to go through Router B at Router
A
- Original Message -
From: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Place a summary route to null 0 for the networks on Router D on your
OSPF
routers and set the
[EMAIL PROTECTED]...
... or route-map the router D network(s) to go through Router B at
Router
A
- Original Message -
From: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Place a summary route to null 0
ough Router B at
Router
A
- Original Message -
From: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Place a summary route to null 0 for the networks on Router D on
your
OSPF
routers and set t
: Wanna Be a CCIE? Try This One [7:6076]
Thanks for the recommendations. Firstly, let me explain why I need the
routing to behave in such a way. The reasons are purely geographical and I
want to reduce latency. Routers A and B are in London and connected back to
back via FastEth. Routers C and D
. In the absence of
more information, the use of BGP sounds like a pretty good solution to
the given problem.
Alan
- Original Message -
From: Peter I. Slow, CCNP Voice Specialist
To:
Sent: Tuesday, May 29, 2001 11:29 AM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
next time you
, and BGP int routes are 200
(right?)
- Original Message -
From: W. Alan Robertson
To: Peter I. Slow, CCNP Voice Specialist ;
Sent: Tuesday, May 29, 2001 12:42 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Peter,
With all due respect, he doesn't have an IGP problem... He
:(646) 792.2396
- Original Message -
From: David Chandler
To:
Sent: Tuesday, May 29, 2001 12:00 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Have you tried an inboud distribution list on Router A's area 1
interfaces. If router A doesn't learn the Router D routes thru those
- Original Message -
From: W. Alan Robertson
To: Peter I. Slow, CCNP Voice Specialist ;
Sent: Tuesday, May 29, 2001 12:42 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Peter,
With all due respect, he doesn't have an IGP problem... He has a
routing problem, and would like
- Original Message -
From: Kevin Schwantz
To:
Sent: Tuesday, May 29, 2001 11:50 AM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Peter,
Thanks for your input. I hope my description of the geographical topology
in
another post should point out why I want my traffic to route in the manner
I
Planetary Networks
535 West 34th Street
New York, NY
10001
Cell:(516) 782.1535
Desk: (646) 792.2395
Mail: [EMAIL PROTECTED]
Fax:(646) 792.2396
- Original Message -
From: Kevin Schwantz
To:
Sent: Tuesday, May 29, 2001 11:38 AM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Thanks
solution.
Alan
- Original Message -
From: Peter I. Slow, CCNP Voice Specialist
To: W. Alan Robertson ;
Sent: Tuesday, May 29, 2001 1:02 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Absolutely, but he has traffic going from one router to another,
it's not
ever exiting
What about the fact that OSPF will install an Intra-area route over
and Inter-area route regardless of cost?
:)
- Original Message -
From: Hire, Ejay
To:
Sent: Tuesday, May 29, 2001 12:46 PM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Okay, based on all of the information
]">news:[EMAIL PROTECTED]...
... or route-map the router D network(s) to go through Router B at
Router
A
- Original Message -
From: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
, May 29, 2001 1:17 PM
To: [EMAIL PROTECTED]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Absolutely, but he has traffic going from one router to another, it's not
ever exiting the system.
...why would you want to break up an AS that small into two seperate private
ASes?
besides... the OSPF
going to get
around this ...
steve
From: Kevin Schwantz
Reply-To: Kevin Schwantz
To: [EMAIL PROTECTED]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Date: Tue, 29 May 2001 12:18:33 -0400
Thats a good point James. Distribution lists are too restrictive and not
very scalable
;
Sent: Tuesday, May 29, 2001 1:39 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Peter,
OSPF has a distance of 110, and yes, iBGP has a distance of 200. By
having seperate routing domains for North America and Europe, he could
use eBGP (Distance - 20) between his two networks
: Wanna Be a CCIE? Try This One [7:6076]
Peter,
OSPF has a distance of 110, and yes, iBGP has a distance of 200. By
having seperate routing domains for North America and Europe, he could
use eBGP (Distance - 20) between his two networks.
Distance wouldn't really do anything in this case
I have not yet begun to tizzy! ;)
- Original Message -
From: Peter I. Slow, CCNP Voice Specialist
To: W. Alan Robertson ;
Sent: Tuesday, May 29, 2001 2:16 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
...don't get all in a tizzy, i recognize that you have a good idea.
I
m: Chris Larson
To:
Sent: Tuesday, May 29, 2001 7:24 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076]
Place a summary route to null 0 for the networks on Router D on your
OSPF
routers and set the metrics appropriately for the summary route
-Original Message-
From
, not that
the admin
dist. cant be changed, but ospf is 120, and BGP int routes are
200
(right?)
- Original Message -
From: W. Alan Robertson
To: Peter I. Slow, CCNP Voice Specialist ;
Sent: Tuesday, May 29, 2001 12:42 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Peter
ALL RIGHT, LOOK! The OSPF domain probably isn't big enough to demand
multiple areas anyway, so just put ALL 4 of the routers in AREA 0, make the
matching costs of the common interfaces on RTR A and RTR B lower, and be
done with it!
Please! Nothing wrong with having a single-area OSPF network,
matching costs of the common interfaces on RTR A and RTR B lower, and be
done with it!
;-)
To:
Sent: Tuesday, May 29, 2001 10:52 AM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Peter,
OSPF has a distance of 110, and yes, iBGP has a distance of 200. By
having seperate routing
s a good solution.
Alan
- Original Message -
From: Peter I. Slow, CCNP Voice Specialist
To: W. Alan Robertson ;
Sent: Tuesday, May 29, 2001 1:02 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Absolutely, but he has traffic going from one router to another,
it's not
ever
/me swallows his pride and seconds the motion.
-Peter Slow, CCNBlah
- Original Message -
From: Michael L. Williams
To:
Sent: Tuesday, May 29, 2001 7:52 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
I would have to agree...Given that there are 2 European sites and
2
Message -
From: Peter I. Slow, CCNP Voice Specialist
To: W. Alan Robertson ;
Sent: Tuesday, May 29, 2001 1:02 PM
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Absolutely, but he has traffic going from one router to another,
it's not
ever exiting the system.
...why w
Hey Chuck.. I just thought of something. you only need 2
routers to have 3 OSPF Areas in your diagram you show a router inside
each OSPF area, however, OSPF routers (at least in my understanding and most
Cisco Press book diagrams) are either totally inside an area (all interfaces
? Try This One [7:6076]
Ever wonder what the CCIE candidates talk about on the CCIE list?
The following message came through today. I thought the bright folks on
this
list might be curious, and might want to venture an answer.
Begin original question:
Guys,
I wonder if there is anybody who
agreedto area 0 then on to the intended area
-Original Message-
From: Circusnuts [mailto:[EMAIL PROTECTED]]
Sent: 28 May 2001 15:50
To: [EMAIL PROTECTED]
Subject: Re: Wanna Be a CCIE? Try This One [7:6076]
Chuck- my answer is Yes. The traffic from the Virtual Linked psuedo-ABR
by
R2. This satisfies the Interarea traffic must traverse the backbone rule,
because R2 *is* a backbone router.
This is not theory... It is fact.
Alan
- Original Message -
From: Andrew Larkins
To:
Sent: Monday, May 28, 2001 10:13 AM
Subject: RE: Wanna Be a CCIE? Try This One [7:6076
Ever wonder what the CCIE candidates talk about on the CCIE list?
The following message came through today. I thought the bright folks on this
list might be curious, and might want to venture an answer.
Begin original question:
Guys,
I wonder if there is anybody who remembers the discussion
- Original Message -
From: Chuck Larrieu
To:
Sent: Sunday, May 27, 2001 8:59 PM
Subject: Wanna Be a CCIE? Try This One [7:6076]
Ever wonder what the CCIE candidates talk about on the CCIE list?
The following message came through today. I thought the bright folks on
this
list might
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