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Forum Replies

  1. Hey rene.
    Could you explain, why would you use offset-list in a working network?

  2. Hi Don,

    The main reason to use it is for path control of distance vector routing protocols (RIP or EIGRP). If you have two links between routers then you could use an offset-list to increase the metric of 1 prefix, making it prefer the other link.

    For outbound traffic I wouldn’t use the offset-list, you can use policy based routing for this (it has more options). An offset-list might be useful for inbound traffic perhaps…for example, let’s say that you have a router with two links connected to another router that is out of your control. You could use an offset-

    ... Continue reading in our forum

  3. You applied off-set list to 1.1.1.1 and 11.11.11.11. The result – R2 show ip route rip – 1.1.1.1 has a new hop count of 6 and 11.11.11.11 has new hop count of 11. What if we had a R3 connected to R2… would it show 1.1.1.1 [120/7] and 11.11.11.11 [120/12]. Does R3 take into account the off-set list between R1 and R-2? Does that off-set promulgate throughout the network?

  4. Hi Jason,

    That’s correct. R1 is advertising these networks with a certain hop count to R2 so that’s what R2 is installing in its routing table.

    When it’s advertising these prefixes to R3, it will advertise the metric that it has stored for these networks.

    Rene

  5. How would the offset work for eigrp since it doesnt use hopcount.

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