Thanks for the explanation! I really need to work on my theory in
these kinds of things.
-- Rick Mur CCIE2 #21946 (R&S, Service provider) Sr. Support Engineer -- IPexpert, Inc. Sent from my iPhone On 6 sep 2009, at 20:18, Narbik Kocharians <narbikk_at_gmail.com> wrote: > Rick > > Always look at it from the perspective of the router that originated > LSA type 5s, in a NSSA the ASBR originates type 7, but the ABR > receives type 7s and originates type 5s, therefore, area 0 will NOT > see LSA type 4s, but if area 0 was connected to another area, that > third area will receive type 4s. I think of the ABR (The one that > connects the NSSA to area 0) as a pseudo-ASBR. BTW i did not say > that this will be explained in the same manner in the RFC, just the > way i think of that ABR. > On Sun, Sep 6, 2009 at 11:13 AM, Rick Mur <rmur_at_ipexpert.com> wrote: > Wow I think this is the first time I detect an error in text from > Jeff Doyle, damn! he is human after all :-P > > > -- > > Rick Mur > CCIE2 #21946 (R&S, Service provider) > Sr. Support Engineer -- IPexpert, Inc. > > Sent from my iPhone > > On 6 sep 2009, at 18:26, Narbik Kocharians <narbikk_at_gmail.com> wrote: > >> LSA type 4 WILL NOT be permitted in any stub areas, as a matter of >> fact it won't even be in the area 0, if you have area 0 and a NSSA >> area, the only time you will see LSA type 4s is if you have another >> area (Non-zero area ) connected to area 0. >> >> >> Therefore, i agree with Scott. >> >> On Sun, Sep 6, 2009 at 8:46 AM, Rick Mur <rmur_at_ipexpert.com> wrote: >> 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 >> >> >> Blogs and organic groups at http://www.ccie.net >> >> _______________________________________________________________________ >> >> >> Subscription information may be found at: >> http://www.groupstudy.com/list/CCIELab.html >> >> >> Blogs and organic groups at http://www.ccie.net >> >> _______________________________________________________________________ >> >> >> Subscription information may be found at: >> http://www.groupstudy.com/list/CCIELab.html >> >> >> Blogs and organic groups at http://www.ccie.net >> >> _______________________________________________________________________ >> Subscription information may be found at:http://www.groupstudy.com/ >> list/CCIELab.html >> >> >> >> >> >> >> >> >> >> >> -- >> Narbik Kocharians >> CCSI#30832, CCIE# 12410 (R&S, SP, Security) >> www.MicronicsTraining.com >> Sr. Technical Instructor > > > > -- > Narbik Kocharians > CCSI#30832, CCIE# 12410 (R&S, SP, Security) > www.MicronicsTraining.com > Sr. Technical Instructor Blogs and organic groups at http://www.ccie.netReceived on Sun Sep 06 2009 - 20:44:03 ART
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