Date: Wed, 17 Dec 1997 19:17:13 -0500 From: dennis <dennis@etinc.com> To: Karl Denninger <karl@mcs.net> Cc: hackers@freebsd.org Subject: Re: ifconfig reports bogus netmask Message-ID: <3.0.32.19971217191713.00d44320@etinc.com>
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At 09:41 AM 12/17/97 -0600, you wrote: >On Wed, Dec 17, 1997 at 10:08:26AM -0500, dennis wrote: >> At 11:34 AM 12/17/97 +1030, Greg Lehey wrote: >> Your ISP, unfortunately, most likely uses Ciscos, which CANNOT route to >> hosts. Ciscos can only route to nets, so you must set the PTP interface >> to a subnet mask. This is a waste of a net and arguably wrong (since there >> is, in fact, no network), but we live in a world of ciscoheads. With unix >> you only need use 2 addresses per PTP interface..with ciscos you need to >> use an entire subnet. >> >> Dennis > >Balderdash. > >CISCOs can run un-numbered interfaces (the proper way to do a PTP link where >the terminal end is not a network) and further, can in fact handle and >advertise host routes. Ha, ha. "Unnumbered Interfaces" are a kludge created by Cisco to correct the fact that their interfaces must be on a net. Unnumbered interfaces break the rules of routing. Dennis
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