Re: EIGRP SIA

Just to add to what Paul said... What he said was VERY important! Take for example you have 2 directly connected neighbors and they will not form an adjacency because they are SIA. You will be banging your head against the wall trying to figure out why but the reason is some router 5,6-10 hops away that is causing the issue. Just something to think about when it comes to TS!

Sent from my iPad

On Jun 20, 2010, at 8:17 PM, Paul Negron <negron.paul_at_gmail.com> wrote:

> This is why we deploy features like EIGRP Stub and Summarization. They would
> help to stabilize the network by suppressing certain routes so that little
> changes would not be seen.
>
> Paul
> --
> Paul Negron
> CCIE# 14846 CCSI# 22752
> Senior Technical Instructor
> Www.micronicstraining.com
>
> On 6/20/10 5:35 PM, "masroor ali" <masror.ali_at_gmail.com> wrote:
>
>> thanks for the comments, and for the link.
>>
>> actually i had a little confusion in this, if a router send a query mesg to
>> all its neighbor routers to find the other path, and neighbor dont reply to
>> that router, then the router would clear its neighbor adjacency. it means
>> that if there is a big network of many routers and for instance SIA is
>> happening again and again , it means there is inconsistency in network???
>> how would we overcome this situation???
>>
>> On Mon, Jun 21, 2010 at 3:55 AM, Muzammil Malick <malickmuz_at_gmail.com>wrote:
>>
>>> Sorry, I sent the incorrect link
>>>
>>>
>>> http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008010f016.
>>> shtml
>>> <http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008010f016
>>> .shtml>
>>>
>>> On 20 June 2010 23:44, Muzammil Malick <malickmuz_at_gmail.com> wrote:
>>>
>>>> Hi Masroor
>>>>
>>>> If a router running EIGRP loses the route through its successor and does
>>>> not have any feasible successor it will query all of its EIGRP neighbors
>>>> for an alternative route i.e. the route is now active (rather than
>>>> passive) and the router is actively querying its neighbors for an
>>>> alternative
>>>>
>>>> If all of its neighbors reply then there is no problem.
>>>> However if for some reason, the router does not receive a reply to its
>>>> query from a particular neighbor, it will go into SIA for the queried route
>>>> and will clear the neighbor adjacency for the router
>>>> it did not receive a response from.
>>>>
>>>> Have a read of this link, it should clear things up:
>>>>
>>>>
>>>> http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008010f016
>>>> .shtml#whydisappear
>>>>
>>>> HTH
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 20 June 2010 22:56, masroor ali <masror.ali_at_gmail.com> wrote:
>>>>
>>>>> hi,
>>>>>
>>>>> could anyone would like to make me understand EIGRP SIA in easy
>>>>> wordings??
>>>>>
>>>>> thanks
>>>>>
>>>>> Regards,
>>>>> Masroor Ali
>>>>>
>>>>>
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>>
>
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Received on Sun Jun 20 2010 - 20:31:54 ART