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Hi,Can someone explain me, why in OSPF, Why every area must be connected to area 0 and why those routes in areas which are not connected to area 0 are not being redistributed across the OSPF domain. ( which led virtual link concept i suppose )Why any...
Hi,Assuming i have three routers R1,R2 and R3 sharing a LAN. If i give "ip ospf priority 0" in two of these routers ( say R2 and R3 ) and the router R1 which is the DR for the segment now, fails, what will happen. Since there is no BDR, no router wil...
Hi,I have a doubt in ospf metric calculation. I will atatch a topology with this thread.In that topology i expected the routers R1 and R4 to reach R5's networks via two routes. one through R2 and other through R3. i.e I expected they should choose tw...
Hi,I have some basic doubts in basic OSPF adjacency formation.Assume a topology where in 5 routers R1..R5 are connected by a switch and R3 is the DR and R2 is the BDR. All these routers are fully adjacent. Now another router R6 is connected to LAN.Ca...
Hi,I established a point-point adjacency between routers. When I checked the ospf database i found something new,R1(config-if)#do sho ip os int brInterface PID Area IP Address/Mask Cost State Nbrs F/CFa1/0 10 5 ...
Thanks Peter,I got most of the points u said, except the "type 3 being advertised into/from Area 0". here it goes, Note that only intra-area routes are advertised into
the backbone, while both intra-area and inter-area ...
Thanks once again Peter. Before my questions, i apologize for having thrown vague questions. I ll make it crisp this time.Can you clarify me this, because its routing table will be built using only LSA-3 from the backbone, ignoring LSA-3 received fr...
Hi Giuseppe,First up, Thank you very much for giving an indepth explanation. Also thanking Peter for pointing out the correct link. I went through the entire link. I am now getting the picture. but not entirely Here are my concerns, 1.1.1.0/24=...
Thanks Richard,Just in case, i use this config for hub and spoke topology wont it cause a problem? When OSPF runs on frame relay, I may want routers to never become DR or BDR except one router. This only initially led to the doubt.ThanksChidambaram
Thank you very much Guiseppe. Never expected a big concept to be involved behind this . I was thinking i had made a mistake somewhere. Thanks again. (hats off).Chidambaram
