1. When a router starts, if it is on a LAN it will send hellos and all the routers will agree on the DR depending on the priority. This isn't strictly speaking true, as it wil be the first router to boot up on the LAN will be the DR as a higher priority router will not demote an existing DR. All communication from then on will be to the DR and the DR will pass on the information to other routers. A network LSA will be set for each attached network, and a router LSA will be sent per router.
2. All ethernet port default to broadcast. However, if you have a P2P ethernet interface it is best practice to manually set the type via "ip ospf network point-to-point". The default network type is set by interface type; ethernet, broadcast; Frame relay, non-broadcast; serial HDLC, point-to-point etc.
3. This is done with the OSPF database which is the collection of LSAs propgated throughout the area. As every router in the area has the same database each router has a full picture of the network topology.
Hi there, so when you say network LSA, is called a link LSA? so the DR sends learns all routers by router LSA's sent from each router sent to 184.108.40.206?, this then creates a link LSA and floods it out the routers on 220.127.116.11?
2. what will be the benefit of making it P2P, will this mean that it sends link LSA's directly to each other?
lastly I hear that OSPF has a SPFholddown timer, what is this for, I gather its not the same as used for distance vector to avoid loops, is it to stop the SPF running too soon after it has just finished ?
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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