Date: Sat, 19 Jan 2002 11:29:59 -0800 (PST) From: Tom Samplonius <tom@sdf.com> To: John Brooks <john@day-light.com> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: OT Gateway IP is Broadcast IP Message-ID: <Pine.BSF.4.05.10201191124200.9032-100000@misery.sdf.com> In-Reply-To: <000b01c1a11f$defc0140$1505010a@daylight.net>
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On Sat, 19 Jan 2002, John Brooks wrote: > The other day I came across a Win2k network that has assigned their gateway > IP to their broadcast IP. Seemed strange to me. Is this normal in a windows > environment? > > network: x.x.x.96/29 > gateway: x.x.x.103 > broadcast: x.x.x.103 Usually Windows systems with messed up gateways default to using proxy arp. For instance many sites deliberately set the hosts own IP and the gateway IP to be the same. This means they send ARP requests for every non local IP. Hopefully, the border router is set to handle proxy arp. Proxy arp generates a lot of broadcast traffic. On a DSL network, broadcasts may be flooded to lots of other areas, so you don't necessarily know which router is responding. Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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