Re: LSA Type 4 again

From: Rick Mur <rmur_at_ipexpert.com>
Date: Sun, 6 Sep 2009 17:46:49 +0200

That's a pretty clear explanation :-)

--
Rick Mur
CCIE2 #21946 (R&S, Service provider)
Sr. Support Engineer -- IPexpert, Inc.
Sent from my iPhone
On 6 sep 2009, at 17:20, Scott Morris <swm_at_emanon.com> wrote:
> "Allowed" and "will exist" are two different things.   I'll let Jeff  
> run
> with the idea that they're permitted in NSSA areas 'cause I like Jeff.
> However, I will guarantee that they will not exist  in NSSA areas.  :)
>
> So call it whatever you want!
>
>
>
>
> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider)  
> #4713,
>
> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>
> CCSI #21903, JNCI-M, JNCI-ER
>
> swm_at_emanon.com
>
>
> Knowledge is power.
>
> Power corrupts.
>
> Study hard and be Eeeeviiiil......
>
>
>
> Molomo wrote:
>> Experts,
>>
>> Jeff Doyle says LSA type 4 is allowed in nssa area ( see table  
>> below). I
>> would have thought that since LSA 5 is not permitted then no need to
>> generate LSA 4.
>>
>> My understanding is , ABR generates LSA 4 based on the type 5, to  
>> describe
>> the position of the ASBR.
>>
>>
>> Or am I missing something here?
>>
>>
>> I have also seen this in Quick Reference Sheet by Anthony Sequeira.
>>
>>
>>
>>
>>  Table 8-5. LSA types allowed per area type.
>>
>> Area Type
>>
>> 1&2
>>
>> 3
>>
>> 4
>>
>> 5
>>
>> 7
>>
>> Backbone (area 0)
>>
>> Yes
>>
>> Yes
>>
>> Yes
>>
>> Yes
>>
>> No
>>
>> Non-backbone, non-stub
>>
>> Yes
>>
>> Yes
>>
>> Yes
>>
>> Yes
>>
>> No
>>
>> Stub
>>
>> Yes
>>
>> Yes
>>
>> No
>>
>> No
>>
>> No
>>
>> Totally stubby
>>
>> Yes
>>
>> No[*]<mk:@MSITStore:C:\Documents%20and%20Settings\user\Desktop\R&S 
>> %20CCIE\Recommended%20Reading\Books\Cisco%20press\Jeff%20Doyle 
>> \CCIE_Professional_Development_Routing_TCPIP, 
>> _Volume_I,_Second_Edition.chm::/1587052024/ 
>> ch08lev1sec1.html#ch08tn01>
>>
>> No
>>
>> No
>>
>> No
>>
>> Not-so-stubby
>>
>> Yes
>>
>> Yes
>>
>> Yes
>>
>> No
>>
>> Yes
>>
>> [*] Except for a single type 3 LSA per ABR, advertising the default  
>> route
>>
>>
>>
>> Regards,
>>
>> Molomo
>>
>>
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>>
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Received on Sun Sep 06 2009 - 17:46:49 ART

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