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Forum Replies

  1. Probably I’ve understood it, since I haven’t watched your video before asking the question. Let me try: There is no permanent problem between Router 1 and his neighbors, since this was just an example from you. Moreover there still could be a problem with a query between Router 3 and Router 2 (theres none in your example but it could happen). Nevertheless I barely unterstand the “congestion” part?!

  2. Hi Paul,
    You generally have it right. The short answer is after 90 seconds, an SIA-Query is sent.

    The longer answer:

    Each router manages its own SIA Query and SIA Query Response management. This means that as soon as each router has put a route in Active (regardless of whether the router in question was the actual first router to start the process) and has sent a Query to its neighbors, that router also starts a timer. At 90 seconds, for each neighbor from which it has not received a reply, it will send an SIA Query to check on the status of the original que

    ... Continue reading in our forum

  3. Hello Pradeep.

    These are very good questions. In the first question, the answer is yes, even if hello packets are being recieved from a router, the SIA state will still kill the neighbour adjacency. You can think of the Stuck in Active condition as an additional condition for which neighbour adjacencies are killed.

    As for your second question, yes you’re right, the SIA reply may also fail to reach Router 1 due to congestion. Only one SIA Query is sent at 90 seconds. However, the purpose of the SIA Query and Reply feature is not only to resolve eigrp failure

    ... Continue reading in our forum

  4. Hi Ananth Maruti,

    If there is more than one feasible successor, then surely it will be listed in the topology table of EIGRP. Please remember the forumla: to have a feasible successor then the Advertised distance of feasible successor should be less than the Feasible distance of successor.

    For the 2nd part of your question, if the network in converged than the calculation of successor & feasible successor(s) is already done. In this case, if a successor route goes down, then the feasible successor takes over. In case the topology table had another feasible succ

    ... Continue reading in our forum

  5. Thanks for such a good brief .Can we have a lab where we can test it.

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