From: Paul Cosgrove (paul.cosgrove@heanet.ie)
Date: Fri Aug 29 2008 - 20:12:35 ART
Not sure I'm the best person to predict the future of thes_e (haven't
delved very deeply into _IS-IS), but I would agree with Keith that
neither will be disappearing anytime soon.
More people know OSPF, but IS-IS is not very difficult to understand. If
you have a little time to try it out you will find it quite similar to
OSPF in many respects._
_
Resource demands are likely to be more of a concern when you have large
routing tables, and ISPs often prefer to use a single process for both
v4 and v6.
IS-IS allows you to run single or multiple topology routing for IPv4 and
IPv6. With OSPF you currently have to run separate processes for IPv4
and IPv6 routing - but if you look at the IETF OSPF working group web
page you will find:-
"Mar 2009 Develop a single instance OSPFv3 Multiple Topology Routing
(MTR) specification and submit to IESG for consideration as a Proposed
Standard "
Paul.
keith tokash wrote:
> There's very little chance of IS-IS going away any time soon. If you're
> thinking of ignoring it and hoping it disappears before you have to deal with
> it (which is my ISDN strategy), it's not going to work. We're planning on
> moving our backbone to IS-IS in about 1-2 years also. No one wants to manage
> two separate OSPF processes, one for v4 and one for v6.
>
> If you plan on avoiding the SP arena, to specialize in corporate security for
> example, then you'll probably be ok.
>
>
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>> Date: Fri, 29 Aug 2008 10:15:51 -0800
>> From: darklordrouter@gmail.com
>> To: paul.cosgrove@heanet.ie
>> Subject: Re: IS-IS Vs OSPF, the fight!
>> CC: ccielab@groupstudy.com
>>
>> Paul,
>>
>> What do you think of the future of IS-IS as OSPF is the way more popular
>> protocol?
>>
>>
>>
>> On Thu, Aug 28, 2008 at 11:38 PM, paul cosgrove
>>
> <paul.cosgrove@heanet.ie>wrote:
>
>>> IS-IS is used a lot in SPs, one reasons is that you can exchange IPv4 and
>>> IPv6 routes using the same process.
>>> In the past I think some of the optimisation features (timer tweaks etc.)
>>> have been available in IS-IS before OSPF.
>>> People tend to me more familiar with OSPF though.
>>>
>>> Paul.
>>>
>>> darth router wrote:
>>>
>>>
>>>> in SP networks, which is better, and why?
>>>>
>>>> How prevalent is IS-IS in the real world?
>>>>
>>>> Is there a large chance that it will shrink and go away?
>>>>
>>>>
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