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  • Cisco 2801 router and WIC-1AM-V2 for outgoing internettraffic reduandacy

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    Hello guys,
    I have a customer will the following requirements. He is presently
    using a Cisco 2801 router and internet connection is using a V.35
    interface connected to a DSU.
    He intends to have a outgoing internet traffic reduandcy such that
    when the leased line fails, it will dial on demand the 56k line using
    the WIC-1AM-V2.
    Is this possible? I know this can be done if it is for dialing and
    routing to remote sites whereby no NAT is required.
    But as this uses NAT, how does the NAT failsover? How does the router
    probe the leased line such that when it is done, it dials on demand
    the 56k?
    Anyone?
    Cheers!
    cisco-nsp mailing list cisco-nsp (AT) puck (DOT) nether.net
    archive at
  • No.1 | | 545 bytes | |

    7/6/06, Dave Lim <dave.daturax (AT) gmail (DOT) comwrote:

    But as this uses NAT, how does the NAT failsover?

    Don't. Have a second NAT setup for the Dialer and let routing take
    care of whether or not its used.

    How does the router probe the leased line such that when it is down

    Floating statics, maybe even controlled w/ object tracking (search
    archives, Rodney Dunn has posted plenty of information on it).

    cisco-nsp mailing list cisco-nsp (AT) puck (DOT) nether.net

    archive at
  • No.2 | | 629 bytes | |

    Hi,

    Thu, Jul 06, 2006 at 06:57:06PM -0700, Kevin Graham wrote:
    7/6/06, Dave Lim <dave.daturax (AT) gmail (DOT) comwrote:

    But as this uses NAT, how does the NAT failsover?

    Don't. Have a second NAT setup for the Dialer and let routing take
    care of whether or not its used.

    Hmmm, if the dialer interface and the leased line interface are on
    the same router, both tagged as "ip nat outside", and will use the same
    IP addresses (read: no "dynamic IP addresses" on the ISP side), NAT
    shouldn't really care - and the failover should leave NAT table entries
    intact.

    gert

Re: Cisco 2801 router and WIC-1AM-V2 for outgoing internettraffic reduandacy


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