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
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118.118.118.0/24
in area 0 _____________________________
| |
| | 3.3.3.0/24
| | network in area 0
____|___ ____|____ ________ | _______
| | | | | | | | |
| | | | Virtual | |____|__| |
|Myrouter| | 215 |__Link___| 214 | | 213 |
|________| |_________| |________| |_______|
| | |
| | |
| | |
|____________ 2.2.2.0/24 __________|
network in area 1
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