How to configure two routers with two ISPs and PIX 515 with failover with BGP?

Discussion in 'Cisco' started by ashaffer, Sep 28, 2005.

  1. ashaffer

    ashaffer Guest

    How to configure two routers with two ISPs and PIX 515 with failover
    with BGP?

    This is what we have
    2 Cisco 2801
    1 PIX 515e
    1 PIX 515e FO

    ISPs
    Megapath
    Qwest

    There is public addresses between the 2801s and pixes.


    Any help on this would greatly be appreciated.

    Andrew
     
    ashaffer, Sep 28, 2005
    #1
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  2. ashaffer

    ashaffer Guest

    Hope this helps


    Qwest ---------- Router 2 ------- PIX FO -------
    |

    | failover
    |
    Megapath----- Router 1 -------- PIX ----------
     
    ashaffer, Sep 28, 2005
    #2
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  3. No, it does not.
    What kind is your IP space. PI or PA?

    Christian
     
    Christian Lox, Sep 28, 2005
    #3
  4. this really doesnt do you any good.
    If Megapath breaks on the WAN side of the router, your PIX will not
    failover.

    you need a segment inbetween, a switch, that holds both routers and both
    PIX's
    and then OSPF and HSRP between the two routers.

    then you need to address the public IP range side of this.
    you need a Provider Indepeendant Range - a PI range aasigned to you.
    next you need to arrange the BGP with the two providers.
    and keep in mind the slow convergence times of BGP.

    HTH
    Martin Bilgrav
     
    Martin Bilgrav, Sep 28, 2005
    #4
  5. IP space is almost immaterial, as long as both ISPs agree to
    advertise it and you have an ASN. Basic design is to have one
    router peer (EBGP) with Qwest, the other peer (EBGP) with Megapath,
    run IBGP between them, run HSRP between them for the PIX to use for
    default GW, configure PIX to be default GW for interior users. That
    eliminates PIX, routers, lines, and ISPs as single points of
    failures. Does not eliminate switches or configuration errors as a
    single point of failure. From the viewpoint of the design, the PIX
    and the failover PIX are a single box with a higher availability
    (and some weird failure modes, but that is a different can of worms).

    Set up details for BGP will depend upon relative importance of
    fail over versus load balancing versus budget. Other approaches
    are possible, depending upon your specific requirements.

    Good luck and have fun!
     
    Vincent C Jones, Sep 29, 2005
    #5
  6. ashaffer

    anilkarthik

    Joined:
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    hi Andrew

    send me u r network diagram i will tell u how to configure your requirement


    karthik

     
    anilkarthik, Jul 28, 2008
    #6
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