Date: Tue, 07 Sep 1999 13:47:14 -0400 From: Mitch Collinsworth <mkc@Graphics.Cornell.EDU> To: "Mark Jones" <mjones@mco.net> Cc: freebsd-questions@freebsd.org Subject: Re: multi-homed Message-ID: <199909071747.AA232456435@broccoli.graphics.cornell.edu> In-Reply-To: Your message of "Tue, 07 Sep 1999 13:26:06 EDT." <01e701bef956$142c3de0$96baa7d1@zigzag.mco.net>
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Ok, but what about my 2nd question: about round-robin during a T1 outage? Have you thought about this? Unless the round-robin feature is smart enough to detect the T1 outage and only give out the good address while the other one is down, you will still lose 50% of your hits. Is this the elimination of downtime you were after? -Mitch >That would be great if they would take the fastest route. The main reason we >want this is to help eliminate downtime if one t1 goes down. >-----Original Message----- >From: Mitch Collinsworth <mkc@Graphics.Cornell.EDU> >To: Mark Jones <mjones@mco.net> >Cc: freebsd-questions@FreeBSD.ORG <freebsd-questions@FreeBSD.ORG> >Date: September 7, 1999 1:08 PM >Subject: Re: multi-homed > > >> >>This is not the answer to the question you asked, but why wouldn't you >>want your packets to take the best/fastest/shortest path, rather than the >>one that came up heads this time even if it's much farther/slower than >>the other? I don't know if you're aware but the difference can be orders >>of magnitude in some cases. >> >>Also if your dns is doing a 50/50 round-robin between addresses on >>different providers, does this mean that when one T1 goes down half of >>your web hits will arrive at the server ok while the other half fail >>(at the browser end) due to network unreachable? >> >>-Mitch >> >> >>> We have two T1's one sprint one uu-net. I have configured a webserver >>>machine with one ethernet card to have two ip addresses, one on the sprint >>>feed and one on the uu-net feed. The default route is set to the uu-net >>>feed. I have set our dns to round robin the hostname between the two ip >>>addresses. >>> >>>When some one trys to access the server the rodrobin 50/50 between the two >>>addresses no problem but the reply goes out the default route (the uu-net >>>feed). >>> >>>I am looking for two options here. >>>A) if the request comes in on one feed the reply goes out the same. >>>B) it uses the default route unless that feed is down then it switches to >>>the other feed. >>> >>>I think routed will do it but have no clue as to how. Going full >multihomed >>>with bgp etc is not an option. >>> >>>Any help would be appreciated. >>> >>>Mark Jones >>>Technical Services Manager >>> >>> >>> >>> >>> >>>To Unsubscribe: send mail to majordomo@FreeBSD.org >>>with "unsubscribe freebsd-questions" in the body of the message >> >> >> >> >> >>To Unsubscribe: send mail to majordomo@FreeBSD.org >>with "unsubscribe freebsd-questions" in the body of the message >> > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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