[c-nsp] configuration issue with "dial backup with object tracking"

[Rodney Dunn]

On Mon, Aug 06, 2007 at 04:12:31PM +0200, Gert Doering wrote:
> Hi,
> 
> I have a question regarding "reliable static routing backup using object
> tracking" - see this URL
> 
> http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps5413/products_feature_guide09186a00801d862d.html
> 
> basically this stuff ("ip sla" plus "track") does what we want.
> 
> What I can't seem to find a way to configure is:
> 
>   - only switch state in the track object if <x> consecutive pings fail
> 
> (like "ping every 5 seconds, fail over if 3 pings go unanswered").

#1 question with ip sla and track.

Go under the track option and adjust the up/down delay configuration.

> 
> We plan to do this on SDSL lines, and depending on line usage and 
> oversubscription in the carrier network, occasional packet loss isn't
> unheard-of - so we would really like to avoid initiating an ISDN dial-up
> every time a single ping gets lost...
> 
> Is this just not there, or am I overlooking something?

Not the best implementation IMO. I've got a requst in to change
it but haven't had much luck yet.

> 
> (We are currently using ipIcmpEcho probes, but could set up an responder
> on the other side and run other IP SLA protocols if that helps)
> 
> gert
> 
> -- 
> USENET is *not* the non-clickable part of WWW!
>                                                            //www.muc.de/~gert/
> Gert Doering - Munich, Germany                             gert at greenie.muc.de
> fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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