Re: Split Horizon

Yeah - exactly - provide enough information to demonstrate your Core
Knowledge and you are all set!

Warmest Regards,

Anthony J. Sequeira, CCIE #15626
Senior CCIE Instructor
http://www.InternetworkExpert.com

Internetwork Expert, Inc.
Toll Free: 877-224-8987
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Test your Core Knowledge today!
Q: RIPng multicast packets have which destination address?
A: FF02::0009
More Info: http://www.faqs.org/rfcs/rfc2080.html

On Apr 23, 2009, at 10:15 AM, Ryan West wrote:

> Sounds accurate to me, I might include port numbers too, depending
> on how the question is worded.
>
> -ryan
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
> Of Ravi Singh
> Sent: Thursday, April 23, 2009 7:10 AM
> To: Anthony Sequeira
> Cc: Robin Betterley; ccielab_at_groupstudy.com
> Subject: Re: Split Horizon
>
> Hi Anthony,
>
> I like today's core knowledge question, however are we OK to say that
> BGPv4 packets are designated by IP protocol 6. TCP is designated by IP
> protocol number 6 and BGP uses TCP as its underlying transport
> protocol.So ideally it is a TCP packet that is designated by IP
> protocol 6 .
>
> I mean RIP uses UDP so if we say that RIP packets are designated by IP
> protocol 17 , will that be a correct statement ?
>
> Hope I am not asking something silly ;-)
>
> Thanks
> Ravi
>
> On Thu, Apr 23, 2009 at 2:12 PM, Anthony Sequeira
> <asequeira_at_internetworkexpert.com> wrote:
>> I would also be aware of the Poison Reverse exception to split
>> horizon. This
>> allows a critical exception when a route needs to be marked as
>> unreachable.
>>
>> Warmest Regards,
>>
>> Anthony J. Sequeira, CCIE #15626
>> Senior CCIE Instructor
>> http://www.InternetworkExpert.com
>>
>> Internetwork Expert, Inc.
>> Toll Free: 877-224-8987
>> Outside US: 775-826-4344
>>
>> Test your Core Knowledge today!
>> Q: BGPv4 packets are designated by which IP protocol number?
>> A: six
>> More Info: http://www.iana.org/assignments/protocol-numbers/
>>
>> On Apr 23, 2009, at 9:03 AM, Robin Betterley wrote:
>>
>>> Hi GS,
>>>
>>> The basic principle is simple: Information about the routing for a
>>> particular packet is never sent back in the direction from which it
>>> was received.
>>>
>>> Is there any other known principle of split horizon?
>>>
>>> Cheers,
>>> R.B
>>>
>>>
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Received on Thu Apr 23 2009 - 10:49:49 ART