Hi All, My question(s) mostly concern the type 3 (network summary) LSA's. The way I understand it, is that a type 3 could contain an LSA from three sources: (1) Default route - resulting from my coding area as STUB. (2) Summarized address range - resulting from my manual coding an AREA RANGE. (3) A singe, explicit LSA - resulting from me doing neither of the two above. This last one creates my question(s). If that is correct, then there are a couple of statements about OSPF workings that don't seem to fit. (1) Even though the type 1 or 2 LSA is not (in that format) flooded outside the area, it ESSCENTIALLY is by simply being re-sent as a type 3 (ie: same info and effect, different packaging)? (The statement is made that "type 1 and 2 are not flooded outside area"). (2) That also means that a change in that single link state WOULD cause a change to be propagated into the other area? Statement is made that "a change in one area is not reflected into another". (I'm assuming that all links in a summarized LSA would have to go down before THAT would cause change.) (3) How would this save any resources or be any different than if it were sent through as a type 1/2? Does that Inter-Area network/link appear to the other-area routers as being directly connected to the ABR and they therefore don't have to run SPF for it, just add cost to ABR? The realization I came to(with this in mind) was that OSPF is designed with summarization etc. in mind, but it's really up to you to manually design the ip addr space and code the summarization to make it work in it's documented fashion? Is this an accuarate statement? THanks for any feedback/opinions. ---------------------------------------------------------------------------- This communication (including all attachments) is intended solely for the use of the person or persons to whom it is addressed and should be treated as a confidential xwave communication. If you are not the intended recipient, any use, distribution, printing, or copying of this email is strictly prohibited. If you received this email in error, please immediately delete it from your system and notify the originator. Your cooperation is appreciated. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=5465&t=5465 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
