I guess the correct netmask should be on the drawing... If so, I would fix the 
config accordingly... 


On 17 Jul 2011, at 01:29, marc abel wrote:

> I don't know the "right" answer to your question, but unless asked to,
> or implicitly asked, I would not change any IP's/subnet masks.
> 
> On Sat, Jul 16, 2011 at 3:42 PM, Bob McCouch <[email protected]> wrote:
>> Hi all,
>> 
>> Doing some reading on EIGRP today and came across a note about how two
>> EIGRP peers can (unlike OSPF) form a neighbor adjacency even with
>> mismatched IP subnet masks, on the condition that both peers agree
>> that the other is within their understanding of the subnet definition.
>> So the example was that two routers addressed with 10.1.1.1/24 and
>> 10.1.1.2/30, respectively, would neighbor up.
>> 
>> OK, fine, so this leads to my question: On the lab let's say I had a
>> task to enable EIGRP for network 10.1.1.0 (mask unspecified...) on the
>> two routers with the IP addresses in my example above. Simply
>> configuring:
>> 
>> router eigrp 1
>>  no auto
>>  network 10.1.1.x 0.0.0.0
>> 
>> Would work, and the neighbor adjacency should form. ASSUMING for the
>> moment that no subsequent task would require me to fix the mask
>> mismatch, should I fix it? I realize there could be other implicit
>> requirements in this case that could force me to fix the mask, but the
>> general question stands: should I fix something that is "wrong", but
>> works?
>> 
>> Thanks!
>> 
>> Sent from my iPad
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> _______________________________________________
> For more information regarding industry leading CCIE Lab training, please 
> visit www.ipexpert.com
> 
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