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  1. Hello Srinivasan

    The Dual homed method 2 involves two separate ISP routers from the SAME ISP. This would most likely increase the cost of the solution compared to method 1 because of the fact that you require your ISP to provide you with two pieces of equipment on their end.

    Method 3 would most likely be even more expensive, because you are purchasing connectivity to two DIFFERENT ISPs, so you can’t take advantage of any discounts the single ISP may give you for multiple links.

    What I’m describing is the most probable case concerning cost. Ultimately it depen

    ... Continue reading in our forum

  2. Hey,
    is it possible to run also VRRP/HSRP with 2 BGP customer Edge Routers to 1 ISP-Router and be like Dual Homed then? Is there a documentation for that?
    I mean 1 public IP shared with Failover by 2 Routers.
    In Detail i would give a loopback the public IP and do OSPF between ISP and Customer(HSRP)

    Best regards

  3. Hello Alexander

    In order to run a redundancy gateway protocol on two edge routers with a single ISP router, you’d need some infrastructure between the edge routers and the ISP routers like a switch. It is possible, but this would introduce a new single point of failure and this is not desired especially on the edge of the network.


    That would also mean that if your edge routers are performing NAT, you would require three public IP addresses, one for each ro... Continue reading in our forum

  4. Hello Jason

    If I understood the configuration correctly, then the 4500 VSS devices are customer devices which connect to each individual ISP, correct? If this is the case, then the configuration that you are looking at is Single Multihomed:


    Even though you are using two devices, they are still viewed as one. The limitation here is that the VSS as a whole cannot belong to two ASs. Each router can only be assigned to a single AS. So if these VSS configure... Continue reading in our forum

  5. Thank you Laz, i will go through these concepts and come back to you if i have any queries

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