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Forum Replies

  1. The configuration is 99% the same. Just make sure you have two equal default routes, in this example the second static route has an AD of 2. Remove that so they both have an AD of 1.

    Secondly create an IP SLA instance for each default route so that you can ping IP addresses of each ISP.

  2. Hi Rene,
    I was testing a similar scenario and the below logs started to appear:

    *Mar  1 02:04:33.427: %TRACKING-5-STATE: 1 rtr 5 state Up->Down
    *Mar  1 02:04:39.427: %TRACKING-5-STATE: 1 rtr 5 state Down->Up
    *Mar  1 02:07:43.427: %TRACKING-5-STATE: 1 rtr 5 state Up->Down
    *Mar  1 02:08:19.427: %TRACKING-5-STATE: 1 rtr 5 state Down->Up
    *Mar  1 02:10:03.427: %TRACKING-5-STATE: 1 rtr 5 state Up->Down
    

    I have configured a static route towards the router which I need to monitor and also have enabled object tracking. Could you please let me know, what could be cause of these logs…

  3. Hi Ian,

    Static routes will send ALL traffic for a certain prefix in a certain direction. It doesn’t care what kind of traffic it is…PBR (Policy Based Routing) lets you change the next hop IP address for specific traffic, for example something that matches an access-list.

    The “backup” time depends on the timers that you configured for IP SLA.

    For your internal networks, OSPF is a good solution because it will automatically deal with failed links and such. IP SLA + Static routes however can be useful for the edge of your network. Imagine you have two ISPs and you want to check if ISP1 is reachable and if not, you can switch to ISP2.

    Rene

  4. Question:
    How will it work the example above plus having OSPF configured on R1, SP1 and SP2?.
    The question is because the OSPF AD is 110 and static routes are AD 1 and AD 2.
    Please advise

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