From: Scott Morris (swm@emanon.com)
Date: Wed Mar 07 2007 - 22:47:24 ART
Stub areas don't get type 5 (External) LSAs. Type 4 LSAs are
ASBR-Summary-LSAs. If you don't have external LSA's, and therefore don't
need to know about an ASBR, why would you need ASBR Summaries (Type4)???
The Practical Studies book appears to be incorrect in this fashion.
I would direct your attention more to either "show ip ospf database" and any
functional differences when the area is non-stub versus stub versus stub
no-summaries. Or, take a look at RFC 2328 (OSPFv2), particularly starting
at section 12.4.3 for information about things like that (I think 12.4.3.1
explicitly says this).
"As specified in Section 12.4.3, Type 4 summary-LSAs
(ASBR-summary-LSAs) are never originated into stub areas."
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Robert Cuello
Sent: Wednesday, March 07, 2007 7:11 PM
To: ccielab@groupstudy.com
Subject: IPExpert R&S Workbook v9 section 5.9
Guys,
In the section 5 step 9 of the R&S Workbook v9, It ask that area 1 does
not receive LSA type 4 or 5.
IPexpert configure this area as "stub" to accomplish this task, but
according to the "CCIE practical studies Vol 1" pag 755, Stub areas allow
LSa types 1,2,3 and 4.
Totally stup area in the other hand only allow LSA types 1, 2 and 3 to
advertise a default route.
Why is "Stub" the answer and not "Totally stub" ???
Thanks
Robert
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