Ok Here it is, this is how we tackled the OSPF Aggregation problem.
To properly aggregate addresses within an internal type OSPF advertisement
you must use the Area x range statement, this would not work because of the
multi area setup and non-contiguous addresses.
Stabilization of area 0
7500's can handle it...I would want RSP4's at a minimum. 200 routers
can be in a full mesh and a single IGP area if you wanted. You probably
only want to mesh your core and depending on the pysical configuration
use RRs for the access layer...Unless all your access routers are on
the same
All,
I have a question that may have several answers, I have tried a few with
varying results and would just like to see if anyone else has any
suggestions. We run a Large Telco Data Backbone, most of which has been run
on OSPF and BGP. Our distribution and access layers contain layer three
Good old-fashioned re-addressing. Once you re-address, summarize at the
abr's.
Mark Paterson wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
All,
I have a question that may have several answers, I have tried a few with
varying results and would just like to see if anyone
Can't re-address, these a public routable addresses, remember this is a
Telco Service provider, If it where that easy we would have done it that
way, this network also makes an enterprise look small by comparison. You
need to really think about this one.
Message Posted at:
You have to readdress. ATT does it, so can you. I never said it was going
to be fun.
Mark Paterson wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Can't re-address, these a public routable addresses, remember this is a
Telco Service provider, If it where that easy we would
Use IBGP for customer routes and OSPF only for reachability (loopbacks
and links between routers).
Your primary concern with OSPF at that point will be the
number of routers in a given area and link instability. If
you have enough routers that summarization is still reqired.
it is much easier
Why go away from EIGRP? Are you putting in No'tell or something? (WARNING! 2
cents: If aint broke.)
It seems that you may be able to place some those discontiguous nets into
some stub or NSSA's. My gut thought is to limit the core router and one
interface hop as part of Area 0 and then
In a message dated 11/13/01 4:57:36 PM Central Standard Time,
[EMAIL PROTECTED] writes:
Subj: Re: OSPF aggreation question [7:26091]
Date: 11/13/01 4:57:36 PM Central Standard Time
From: [EMAIL PROTECTED] (Mark Paterson)
Sender:[EMAIL PROTECTED]
Reply-to: [EMAIL PROTECTED] (Mark
Excellent suggestion, That is our end goal. And considering we are running a
number of 12012's that can handle lots of peering sessions, BPG would be an
excellent solution. However if you had smaller routers at the core, say
7500's could this still work. The network has 200 access routers, that
Your a funny guy :-) come on are you not going for your CCIE, There is a way
of doing this with out BGP or Re numbering.
Mark
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=26183t=26091
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