A customer of mine uses "3DNS" servers (brand name) provided by Colt. These are intelligent DNS servers that do periodic TCP connections to ports you specify for each of the records you have for the same host. If one stops responding, it stops handing out that address.
Symon -----Original Message----- From: Troy Leliard [mailto:[EMAIL PROTECTED] Sent: 05 March 2003 16:10 To: [EMAIL PROTECTED] Subject: Re: Multiple WAN Connections to a Network [7:64469] If I follow, you have two wan conncetions providing access to you server farm. Some of the servers on this farm will have 2 public IP address, one from each of your providers? Presumably you aren't of a large enough size to warrant applying for you own AS, and using BGP,m which is the preferred solution. (as you will see why below). The next question is how do you invisage doing load balancing / fault tolerance. Presumably you will have two dns entries for your server, eg www.mywebserver.,com has two a records, on pointing to the Sprint IP, and one pointing to the Qwest IP. If either of your wan links go down, dns is not intelligent enough to stop routing to the "down" ip address and you will still have 50% traffic being dropped due to the round robin nature of DNS. Terry Oldham wrote: > > Hello, > > Our goal is to setup the two WAN connections for both fault tolerance > and load balancing via the router. > > We want some of the server machines to have direct access to the > internet and then the rest will go through our proxy server. The > computers that we > want to connect directly will be issued an IP address from the > block of IP > that we were given, in fact they will be given 2 ip addresses, > one from > Qwest and one from Sprint. > > I too am a lowly CCNA just looking for answers... > > Thanks > > ""Steven Aiello"" wrote in message > news:[EMAIL PROTECTED] > > Terry, > > > > I'm not totally sure what you are doing with your setup. > Are you web > > hosting and you have the 2 connections up for fault > tolerance? or some > > other reason. Unless I am mistaken is you are running > between to AS's > > on the net you need to use BGP. ( Please all correct me if > I'm wrong, > > I'm still a lowly CCNA ) But I know that when we had our > Qwest line > > installed they asked us if we had another service provider > for this > > reason. Also if you are a stub network why not use default > routes? > > Like I said it's hard to say for sure with out knowing what > your doing. > > That's just what occurred to me. Hope it helps. > > > > Again please to all in the group correct me if I am mistaken, > I'm more > > than happy to be corrected if it means I have a greater > understanding of > > the subject. > > > > Steve ============================================= This email has been content filtered and subject to spam filtering. If you consider this email is unsolicited please forward the email to [EMAIL PROTECTED] and request that the sender's domain be blocked from sending any further emails. ============================================= Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64534&t=64469 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
