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Forum Replies

  1. Hi Sergio,

    Good to hear you figured it out. RIP and EIGRP require a seed metric, if you don’t specify it then the metric will be infinite and it can’t be installed in the routing table.

    Rene

  2. hi rene ive done the redistribution but I can’t seem to get router 1 to see the 192.168.23.0/24 network I can see the 1.1.1.0/24 network from router 3 and I can make it work if I put in the static route on router 1 so if router 3 pings router 1 from a source ip in the ospf area it can get back but i can’t get the network in it’s route table I’ve debugged routing on router 4 and its being told about the ospf network from router 3 but router 2 is not telling router 1 about the ospf network

  3. Hi Shaun,

    First of all, let’s forget about the static routes :slight_smile: With static routes we can make anything work but in this example, we are using routing protocols only.

    The problem with R1 and 192.168.23.0/24 is that R2 will never install a route from R4 about 192.168.23.0/24.

    Why? For R2, it’s a directly connected network so whatever R4 advertises…the directly connected link is always preferred.

    If you want reachability to it from R1 then it’s best to do a “redistribute connected” on R2, make sure you use a route-map so that only the FastEthernet0/0 interface is selected.

    Rene

  4. Hello Ray,

    You could add that route-map to R2 and R4 so that R2 sets the tag and R3 doesn’t redistribute it back into OSPF because of the tag.

    That works, but it also means that the OSPF domain won’t know about the 1.1.1.0/24 network. If you have another router (let’s say R5) in the OSPF domain that needs that route, then you have a problem.

    Of course, it’s unlikely to see stuff like this on a production network but be very careful when reading the requirement(s) on an exam.

    Here is an example where you should use tags:

    //cdn-forum.networklessons.com/uploads/de

    ... Continue reading in our forum

  5. Hi Rene and staff,

    i want to add another comment for the final solution. Perhaps it could help someone
    "
    R4 will use the EIGRP external entry (AD 170) for 1.1.1.0 /24. R2 and R3 both redistribute 1.1.1.0 /24 into EIGRP, the route that R4 installs depends on the seed metric
    "
    In the lesson R2 redistribute RIP into EIGRP with BW=1000
    And R3 redistribute OSPF into EIGRP with BW=1500
    So in my opinion R4 will install the route via R3
    I don’t know why so low values are used in the lesson with FastEthernet (?)

    But in my GNS3 lab, i set R2 and R3 both to redistribute 1

    ... Continue reading in our forum

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