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From: News Reader on 6 May 2008 19:28
Max wrote:
> Hi everyone.
>
> I have a problem concerning 'IP CLASSLESS' on cisco routers
> I have quite a lot of vpn tunnels with IP CLASSLESS enabled on the
> router and some that it is not enabled.
> i have noticed that there are some application that i'm using that are
> not working fine when it's not enabled.
> i've tried to enable it on those routers but it doesn't seem to change
> anything.
> i typed 'IP CLASSLESS' and when i look in the running config it's
> nowhere
>
> for example:
> cisco 871w with IOS Version 12.4 = no IP CLASSLESS = not working ( but
> i don't seem to be able to enable it)
> cisco 851 with IOS Version 12.3 = IP CLASSLESS enabled = works fine
>
> any explanation?

There are numerous commands that do not show up in the configuration
file when set to their default state. Furthermore, the default may
change from one IOS release to another, as well as whether they show up
when configured to their default state.

The behavior of "Default Routing" is very much dependent on the setting
of "IP Classless", and is likely the functional issue you have observed.

Best Regards,
News Reader
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