For the IP redundancy (statefull failover services) feature, see:
http://www.cisco.com/warp/public/619/hsrpguide4.shtml#10
It discusses future feature integration with HSRP (including NAT).
-dre
"Bob Johnson" <[EMAIL PROTECTED]> wrote in message
E97B82F2C364D411935C009027FC3EBC70C175@VANMAIL1">news:E97B82F2C364D411935C009027FC3EBC70C175@VANMAIL1...
> Currently the IOS does not support NAT & HSRP operating together....
> It's not a bug as they do mention it somewhere on CCO (possibly in the NAT
> FAQ)
>
> There is both the problem with the standby router not knowing the NAT
> translation table of the active router and the fact that NAT won't use the
> virtual MAC address but uses the actual physical address....
>
> I've heard that they are working on a enhancement that should address both
> issues. Hopefully it will be out in 12.2x.
>
> Bob
>
>
> -----Original Message-----
> From: Jason Fletcher
> To: [EMAIL PROTECTED]
> Sent: 2/16/01 3:24 PM
> Subject: Re: NAT & HSRP Problem
>
> I don't think you can do this? The standby router doesn't have the
> translation table of the active router, so when the active router went
> down
> you will lose your connection.
>
> Jason Fletcher
>
> "Simon Watson" wrote in message ...
> ><html><DIV>Hi Guys</DIV>
> ><DIV> </DIV>
> ><DIV>I've got 2 dual ethernet Cisco 1605 routers connected to each
> other
> via 2 cascaded hubs.Both sets of interfaces are set up for HSRP.(eth0 of
> both routers are in one HSRP group & eth1 are in another HSRP
> group). Both routers have also been set up to staically NAT a
> device(which
> will be called Test PC) on the local network which is connected to
> eth
> 1 of the routers.Also tracking is set on both of the primary router's
> interfaces to monitor the other interface.</DIV>
> ><DIV> </DIV>
> ><DIV>Eth0 on both routers are connected to a Core router via a hub. In
> normal operation, if the test PC sent
> continous
> PING's to a device hanging on the Core router, it's local IP address is
> translated by the HSRP Primary router & routed towards the core
> router
> & all is well. On inspection of the Core routers ARP cache
> shows
> the translated IP address of test PC and the virtual MAC- address of the
> primary (int eth0) HSRP router as expected.</DIV>
> ><DIV> </DIV>
> ><DIV>However if the cable on eth1 of the Primary router is plugged out
> to
> invoke the Standby router to become active the PING's seemed to be
> not
> getting through. On inspection of the 2 1600 routers the changover of
> the
> Standby router from standby to active has taken place, with the Primary
> router now in a standby state.</DIV>
> ><DIV> </DIV>
> ><DIV>However on inspecting the ARP cache of the core router, instead of
> seeing the translated IP address of the test PC with the virtual MAC
> address, the translated IP address was seen with the REAL hardware
> address
> of the now standby interface on the primary router, thus causing the
> PING's
> not to work.</DIV>
> ><DIV> </DIV>
> ><DIV>I've tried this with another set of routers & the same thing
> happened. Has Cisco got a bug with HSRP being configured with a router
> when
> NAT is also configued. Plase let me know your thoughts on this
> matter.</DIV>
> ><DIV> </DIV>
> ><DIV>Thanks</DIV>
> ><DIV>Simon CCNP</DIV><br clear=all><hr>Get Your Private, Free E-mail
> from
> MSN Hotmail at <a
> href="http://www.hotmail.com">http://www.hotmail.com</a>.<br></p></html>
> >
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> >
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>
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