T3 or not to T3

Jim Van Baalen vansax at atmnet.net
Mon Jul 22 16:35:47 UTC 1996

> Yeah, definately.  But most backbones seem to have "customer routes" as
> an option, and if I trust them enough to get those routes correct then
> I will hopefully not have to bother with extreme amounts of filtering.
> It's pretty easy to enforce "no transit" at the packet filtering level
> -- only packets destined for my nets will be allowed in.  Is there some
> other aspect of filtering I'm forgetting about?  We have a dedicated
> and backup network engineer at any rate.  The border router would be a
> cisco 7200 or 7500 series with 128Mb.
> Dean

Is this really how people enforce "no transit"? I have been told that packet
filtering is quite cpu expensive. I would think that packet filtering on a 
router that is probably already overburdened is not an attractive solution.


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