Static Routing

Static Routing

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Subject Author Date
Static Routing MC 08-26-2004
---> Re: Static Routing Anthony Louis S ..08-26-2004
Posted by MC on August 26, 2004, 12:44 am
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I have a location that has three routers, One is primary and one is backup
back to another location, The third is default gateway to corporate.

They are not using HSRP on the redundant routers and do not want to use
dynamic routing protocol between them and the third router.

I have static routes point to the redundnat routers from the third router to
get to the remote subnet, higher cost to the backup router. However if the
WAN circuit goes down on the primary router but the LAN interface is still
up the routes never switch of course.

Can a Cisco router do a verification to a remote IP gateway IP beyond the
LAN interface to verify the WAN is up or not. Thought could be done using
policy routing but not sure.


Thanks,
MC




Posted by Hansang Bae on August 26, 2004, 6:13 am
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@yahoo.com says...
> I have a location that has three routers, One is primary and one is backup
> back to another location, The third is default gateway to corporate.
>
> They are not using HSRP on the redundant routers and do not want to use
> dynamic routing protocol between them and the third router.
>
> I have static routes point to the redundnat routers from the third router to
> get to the remote subnet, higher cost to the backup router. However if the
> WAN circuit goes down on the primary router but the LAN interface is still
> up the routes never switch of course.
>
> Can a Cisco router do a verification to a remote IP gateway IP beyond the
> LAN interface to verify the WAN is up or not. Thought could be done using
> policy routing but not sure.


You're looking for ping based routing (using SAA). But you *really*
should run a routing protocol.

--

hsb

"Somehow I imagined this experience would be more rewarding" Calvin
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Posted by Anthony Louis Swanson on August 26, 2004, 10:22 am
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If you did HSRP you could set it up interface tracking and decrement the
routers priority. This would allow the standby router to preempt the
current active router when it noticed inactivity on the WAN link.

MC wrote:
> I have a location that has three routers, One is primary and one is backup
> back to another location, The third is default gateway to corporate.
>
> They are not using HSRP on the redundant routers and do not want to use
> dynamic routing protocol between them and the third router.
>
> I have static routes point to the redundnat routers from the third router to
> get to the remote subnet, higher cost to the backup router. However if the
> WAN circuit goes down on the primary router but the LAN interface is still
> up the routes never switch of course.
>
> Can a Cisco router do a verification to a remote IP gateway IP beyond the
> LAN interface to verify the WAN is up or not. Thought could be done using
> policy routing but not sure.
>
>
> Thanks,
> MC
>
>



Posted by MC on August 28, 2004, 11:09 pm
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I do not have control over the routers I have to route traffic to in this
case and the other end is not willing to make any changes (I don't think
they know how and do not want to admit it)

Anyway the SAA feature is what I was trying to remember, Read about it
before but forgot. I will check it out and maybe will do the job for now
until I can convince the other end to configure their routers with HSRP.

Unfortunatly due to security reasons we can not run dynamic routing.

Thanks,
MC


> If you did HSRP you could set it up interface tracking and decrement the
> routers priority. This would allow the standby router to preempt the
> current active router when it noticed inactivity on the WAN link.
>
> MC wrote:
> > I have a location that has three routers, One is primary and one is
backup
> > back to another location, The third is default gateway to corporate.
> >
> > They are not using HSRP on the redundant routers and do not want to use
> > dynamic routing protocol between them and the third router.
> >
> > I have static routes point to the redundnat routers from the third
router to
> > get to the remote subnet, higher cost to the backup router. However if
the
> > WAN circuit goes down on the primary router but the LAN interface is
still
> > up the routes never switch of course.
> >
> > Can a Cisco router do a verification to a remote IP gateway IP beyond
the
> > LAN interface to verify the WAN is up or not. Thought could be done
using
> > policy routing but not sure.
> >
> >
> > Thanks,
> > MC
> >
> >
>




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