Re: largest OSPF core

2010-09-09 Thread Truman Boyes
On 2 Sep 2010, at 8:20 PM, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? I have seen (as a consultant, not operator) a production SP network that had over 800 routers in the backbone area. The LSDB was rather small as the

Re: largest OSPF core

2010-09-03 Thread Warren Kumari
On Sep 2, 2010, at 11:11 AM, Nick Hilliard wrote: On 02/09/2010 13:20, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? You don't expect anyone to actually admit to something like this? :-) Of course I do -- 'tis much for

Re: largest OSPF core

2010-09-02 Thread Nick Hilliard
On 02/09/2010 13:20, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? You don't expect anyone to actually admit to something like this? :-) Nick

RE: largest OSPF core

2010-09-02 Thread Deepak Jain
Subject: Re: largest OSPF core On 02/09/2010 13:20, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? You don't expect anyone to actually admit to something like this? :-) For giggles: http://books.google.com/books?id

Re: largest OSPF core

2010-09-02 Thread Valdis . Kletnieks
On Thu, 02 Sep 2010 14:12:38 EDT, Deepak Jain said: Dual routing is intended to be more of a long-term solution because there will be very few pure OSI or TCP/IP routing environments in the future. Well, they were half-right. ;) pgpjIdWlsKA38.pgp Description: PGP signature

Re: largest OSPF core

2010-09-02 Thread Leo Bicknell
In a message written on Thu, Sep 02, 2010 at 03:20:05PM +0300, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? I'll admit to having seen a network with over 400 devices in an OSPF area 0, didn't design it, and in the end didn't

Re: largest OSPF core

2010-09-02 Thread Alex Ryu
I think it is really depending on how your network topology looks like. If you have top-down design with star topology to limit the network connections to individual routers, it may scale well. But if you connect every routers to each other such as full-mesh, it will be a problem during interface

Re: largest OSPF core

2010-09-02 Thread Christian Martin
In a message written on Thu, Sep 02, 2010 at 03:20:05PM +0300, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? The stability of the topology plays a most prominent role, but it wouldn't surprise me if a OSPF network largely

Re: largest OSPF core

2010-09-02 Thread Owen DeLong
Sent from my iPad On Sep 3, 2010, at 3:42 AM, Deepak Jain dee...@ai.net wrote: Subject: Re: largest OSPF core On 02/09/2010 13:20, lorddoskias wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? You don't expect anyone to actually admit

RE: largest OSPF core

2010-09-02 Thread Deepak Jain
. With respect to these OSPF questions, how many people are running two OSPF processes on each router (v4 and v6) to support dual stack rather than migrating (or just enjoying their existing) ISIS (OSI) implementations? You left out the option of using ospf3 to do both v4 and v6. Works

Re: largest OSPF core

2010-09-02 Thread Chuck Anderson
On Thu, Sep 02, 2010 at 05:32:30PM -0400, Deepak Jain wrote: With respect to these OSPF questions, how many people are running two OSPF processes on each router (v4 and v6) to support dual stack rather than migrating (or just enjoying their existing) ISIS (OSI) implementations? You

Re: largest OSPF core

2010-09-02 Thread Mark Smith
On Thu, 02 Sep 2010 15:20:05 +0300 lorddoskias lorddosk...@gmail.com wrote: I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? Presuming OSPF and IS-IS SPF costs are fairly similar, the following page from The complete IS-IS routing protocol

Re: largest OSPF core

2010-09-02 Thread Randy Bush
The stability of the topology plays a most prominent role, but it wouldn't surprise me if a OSPF network largely comprised of router LSAs (no redistribution), using today's hardware, could easily scale to 1000 nodes in an area. i believe the original poster asked about actual operating

Re: largest OSPF core

2010-09-02 Thread Christian Martin
On Sep 2, 2010, at 7:35 PM, Randy Bush ra...@psg.com wrote: The stability of the topology plays a most prominent role, but it wouldn't surprise me if a OSPF network largely comprised of router LSAs (no redistribution), using today's hardware, could easily scale to 1000 nodes in an area.

Re: largest OSPF core

2010-09-02 Thread Christopher Morrow
On Thu, Sep 2, 2010 at 2:37 PM, Leo Bicknell bickn...@ufp.org wrote: In a message written on Thu, Sep 02, 2010 at 03:20:05PM +0300, lorddoskias wrote:  I'm just curious - what is the largest OSPF core (in terms of number of routers) out there? I'll admit to having seen a network with over

Re: largest OSPF core

2010-09-02 Thread Leo Bicknell
In a message written on Thu, Sep 02, 2010 at 09:40:39PM -0400, Christian Martin wrote: The most interesting point to make, however, is how much legacy thinking in this area continues to be stranded in a rut that emerged 15 years ago. It is not uncommon to hear network folks cringe at the