Re: OSPF LSA type 3 filtering

Read this gr8 article:
http://routingfreak.wordpress.com/2011/03/05/why-providers-still-prefer-is-is-over-ospf-when-designing-large-flat-topologies/

On Fri, Jan 4, 2013 at 12:07 PM, rakesh madupu <raaki.88_at_gmail.com> wrote:

> For me, I love isis in our customer deployments because it shows
> neighboring devices names which is peers with, specially with RR's names ,
> life get so much simpler instead of reading an Ip address and associating
> it again :)
>
>
> On Sat, Jan 5, 2013 at 12:34 AM, Marko Milivojevic <markom_at_ipexpert.com>wrote:
>
>> IS-IS supports multiple routed protocols, i.e. IPv4 and IPv6, whereas
>> OSPF doesn't.
>>
>> Also, in the time when MPLS-TE was emerging as a technology, IS-IS
>> behavior to flood unknown TLVs instead of resetting adjacencies when
>> it receives them (OSPF does that when it receives an unknown LSA).
>> meant a very controlled deployment of new technologies. The fact it's
>> not IP, also has some security benefits (cannot be remotely attacked).
>> Etc.
>>
>> What Joseph said is... not quite the reason, since IS-IS also has a
>> requirement for a contiguous L2 area.
>>
>> --
>> Marko Milivojevic - CCIE #18427 (SP R&S)
>> Senior CCIE Instructor - IPexpert
>>
>> On Fri, Jan 4, 2013 at 10:34 AM, Imran Ali <immrccie_at_gmail.com> wrote:
>> > marko i need to know why they use is-is over ospf
>> >
>> > On Fri, Jan 4, 2013 at 8:53 PM, Marko Milivojevic <markom_at_ipexpert.com>
>> > wrote:
>> >>
>> >> In reality, for this purpose, IS-IS and OSPF are pretty much the same
>> >> (Type 2 vs Pseudonode LSP). They both use a very similar approach to
>> >> solve the same calculation problem.
>> >>
>> >> Carriers tend to use IS-IS for one other reason (to some extent
>> >> remedied by OSPFv3). This is a separate discussion though.
>> >>
>> >> --
>> >> Marko Milivojevic - CCIE #18427 (SP R&S)
>> >> Senior CCIE Instructor - IPexpert
>> >>
>> >>
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>>
>
>
> --
> Any Fool can Know The Point is to Understand - Einstein
>
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-- 
*Narbik Kocharians
*CCSI#30832, CCIE# 12410 (R&S, SP, Security)
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