Re: [nsp] BGP Multihoming -how to announce backup route???

From: sthaug@nethelp.no
Date: Wed Nov 21 2001 - 12:51:41 EST

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> > Bzzzt. Still wrong. There's nothing to stop anyone with an ARIN /20
> > announcing smaller blocks.
>
> No. But there is nothing either that is going to force *me* to ever
> increase my router's CPU and memory. If those people want to be reached,
> they can announce the /20. If they do not want, they can announce it
> as /32s (which would be ridiculous, but then, where is the border to
> "ridiculous"?).

I think this is pretty ridiculous, actually:

*>i24.154.32.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.33.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.34.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.35.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.36.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.37.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.38.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.39.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.40.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.41.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.42.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.43.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.44.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.45.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.46.0/24 213.239.22.241 200 0 8918 701 7046 ?
*>i24.154.47.0/24 213.239.22.241 200 0 8918 701 7046 ?

Or this:

*>i24.214.32.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.33.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.34.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.35.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.36.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.37.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.38.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.39.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.40.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.41.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.42.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.43.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.44.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.45.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.46.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.47.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.48.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.49.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.50.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.51.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.52.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.53.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.54.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.55.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.56.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.57.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.58.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.59.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.60.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.61.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.62.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?
*>i24.214.63.0/24 213.239.22.241 200 0 8918 1239 4006 12083 ?

Plenty more among the current 105k routes...

Steinar Haug, Nethelp consulting, sthaug@nethelp.no

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