[OSPF] Doubt and clarification on RFC 2328 sec 16.2
sengottuvelan srirangan <sengottuvelan_s@yahoo.com> Fri, 13 October 2006 04:22 UTC
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Date: Thu, 12 Oct 2006 21:22:22 -0700
From: sengottuvelan srirangan <sengottuvelan_s@yahoo.com>
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Subject: [OSPF] Doubt and clarification on RFC 2328 sec 16.2
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Hi, I have a query in RFC 2328 sec 16.2. I have topology like in the attachment. I am referring to RFC 2328 section 16.2.. "If an ABR is attached to a transit area(an area with one or more virtual links in it), the router should also examine the summary-LSAs from that area for routing inter-area traffic in addition to the summary-LSAs in the backbone. Therefore, transit areas are the only non-backbone areas that may carry data traffic that neither originates nor terminates in the area itself. Transit area summary-LSAs are examined after the best inter-area route through the backbone is chosen. If any of the transit area summaries provide bet ter routers to a network than a backbone route, the transit area path is used. If the router does not already have a route to the network described by the transit area summary, it should not install a route. In other worksd, a transit area summary may only be used if the network is reachable through the backbone as well." At this point 215 and 214 are ABRs and have a virtual link. So, according to RFC the route 3.3.3.0/24 should not be there on MyRouter. Is this right? Please explain. My argument is that 3.3.3.0/24 route should be there in MyRouter as IA route (summary) via 215 and 215. Is this correct?. Since we can reduce the topology to : area 1 area0 area 0------(MY ROUTER)------------------215-------------------213 so in Myrouter IA route (3.3.3.0/24) will be seen which is advertiesed by 215 (or 214) to area1. Is this correct?. Please anyone clarify the points listed. Please correct me if i am wrong. Thanks and regards, Sengottuvelan --------------------------------- Get your own web address for just $1.99/1st yr. We'll help. Yahoo! Small Business.
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- [OSPF] Doubt and clarification on RFC 2328 sec 16… sengottuvelan srirangan
- Re: [OSPF] Doubt and clarification on RFC 2328 se… Acee Lindem