Date: Wed, 9 Oct 2002 09:46:44 -0600 (MDT) From: Nick Rogness <nick@rogness.net> To: TheGlenMann <cumquott@suscom.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Ping to broadcast ok from subnet, not ok otherwise Message-ID: <20021009094535.E1340-100000@skywalker.rogness.net> In-Reply-To: <3493.12.151.4.177.1034175499.squirrel@webmail.suscom.net>
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On Wed, 9 Oct 2002, TheGlenMann wrote: > Hi all- > > (Is this list working right? - I'm getting lots of wierd stuff in the > digests...but anyway...) > > Other attempts to find the answer to this have failed, hopefully this > isn't too off-topic. > > We have several subnets connected via Frame Relay. Call them 10.10.1, > 10.10.2, 10.10.3, etc. On each, the gateway is the 254 address, e.g., > 10.10.1.254. > > Sitting at a 10.10.1.n machine, I can ping the gateway 10.10.x.254 on > every subnet. However, a ping to the broadcast address as > ping -c1 10.10.x.255 > fails on some of the subnets (from outside that subnet). From within the > subnet, the ping to the broadcast succeeds everywhere. Pings to known > hosts (and 10.10.x.254) succeed always from everywhere. > > So, my question is, why would I be able to successfully ping to the > broadcast address from within a subnet but not from outside the subnet, > but only in certain cases? We have a mix of windows, FreeBSD, router, > and other machines on each subnet. (I'm led to ask all this since where > the broadcast doesn't work from outside the subnet, neither does DHCP, > which is proving to be a real problem!) Do you have Cisco routers connecting your frame's together? Nick Rogness <nick@rogness.net> - WARNING TO ALL PERSONNEL: Firings will continue until morale improves. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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